Academic Qualification

Indian Institute of Technology Kanpur (2012)

Ph.D. (Electrical Engineering)

Indian Institute of Technology Kanpur (2003)

M.Tech. (Electrical Engineering)

Indian Institute of Technology Roorkee (2001)

B.Tech. (Electronics & Communication Engineering)

Professional Experience

Associate Professor, Department of Electronics and Electrical Engineering, IIT Guwahati

August 2021 – till date

Assistant Professor, Department of Electronics and Electrical Engineering, IIT Guwahati

September 2011 - August 2021

Visiting Faculty, IIIT Guwahati

July 2013- December 2013

Tutor Teaching, IIT Rajasthan

July 2008 to May 2009

Tutor Teaching, IIT Kanpur

July 2009 to December 2009

Senior Research Assistant, IIT Kanpur

July 2009- February 2011-April 2011

Area of Specialization

Modeling, characterization, design, analysis, and fabrication of silicon photonics and optoelectronics devices

Area of Interests

Optoelectronics, III-V compound semiconductors, Microelectronics and Device Characterisation, Photonics Integrated Circuits, Integrated Optics, Silicon Photonics, Fiber Lasers, Photonic Sensors, Distributed Acoustic Sensing, Antennas, Vacuum Electron Devices

Microelectronics Fabrication Skills

Mask Designing, Photolithography, Wet etching, Thermal Evaporator, E-Beam Evaporator, Plasmalab 80plus RIE, Rapid Thermal Anneal System, Photoluminescence Spectroscopy, Optical Profiler, Secondary Electron Microscopy, Atomic Force Microscopy (AFM), Focused Ion Beam (FIB)

Research Areas

Optical Modulators

♦ SiGe PN phase shifter in Silicon Photonics platform
♦ Mach-Zehnder modulator
♦ Micro-ring modulator
♦ Traveling wave electrode design
♦ Optical signal processing

Optical Multiplexer

♦ Mode-Division Multiplexer (MDM)
♦ Polarization Beam Splitter (PBS)
♦ Polarization Division Multiplexer (PDM)
♦ Wavelength Division Multiplexer (WDM)
♦ MDM + PDM Hybrid Multiplexer
♦ MDM + PDM + WDM Hybrid Multiplexer

Fiber Amplifier

♦ Investigation on Thulium Doped Fiber Amplifiers for Optical Communication in S and C Bands

Vacuum Electron Devices

♦ Investigation on Advanced Interaction Structures for mm Wave and Sub THz Vacuum Electron Devices

Journals

2022

1. Manoranjan Minz and Ramesh Kumar Sonkar, "Design of a Grating Assisted Silicon Hybrid Mode-,Polarization-, and Wavelength-Division (De)multiplexer for On-chip Optical Interconnects," Applied Optics. (accepted)

2. Gaurav Kumar Bharti and Ramesh Kumar Sonkar, "Design and performance analysis of all-optical D and T flip-flop in a polarization rotation based micro-ring resonator," Optical and Quantum Electronics, vol. 54, no. 3, pp. 1-13, March 2022.




2021

3. Darpan Mishra and Ramesh Kumar Sonkar, "Effect of Wafer Tilt During Ion Implantation on the Performance of a Silicon Traveling-Wave Mach-Zehnder Modulator," IEEE Access, vol. 9, pp. 149993-150003, November 2021.

4. Narugopal Nayek, Mohit Kumar Joshi, Ramesh Kumar Sonkar, Tapeshwar Tiwari, and Ratnajit Bhattacharjee, "Design and Analysis of Width-Modulated Two-Section Sine Waveguide for G-band Travelling-Wave Tube," IEEE Transactions on Electron Devices, vol. 68, no. 12, pp. 6458-6464, October 2021.

5. Gaurav Kumar Bharti and Ramesh Kumar Sonkar, "Implementation of polarization-rotation using micro-ring resonator and its application to design all-optical switch" Optical Engineering, vol. 60, no. 8, pp. 085109, August 2021.

6. Manoranjan Minz and Ramesh Kumar Sonkar, "Design of a hybrid mode and wavelength division (de)multiplexer based on contra-directional grating assisted couplers on the SOI platform," Applied Optics, vol. 60, no. 9, pp. 2640-2646, March 2021.

7. Darpan Mishra and Ramesh Kumar Sonkar, "Analysis of a SiGe Mach-Zehnder modulator for 400G data communication," Applied Optics, vol. 60, no. 7, pp. 2083-2092, March 2021. (Editor's Pick)

8. Dhiman Kakati, Manoranjan Minz, Ramesh Kumar Sonkar, "Performance analysis of grating-assisted passive mode-division multiplexing device using silicon photonics for high-speed RoF/RoFSO communication," Optical Engineering, vol. 60, no. 1, pp. 016102, January 2021.




2020

9. Darpan Mishra and Ramesh Kumar Sonkar, "Performance assessment of a silicon traveling-wave Mach–Zehnder modulator employing quasi-TM mode propagation" Optical Engineering, vol. 59, no. 12, pp. 125104, December 2020.

10. Sumantra Chaudhuri, Rakhesh Singh Kshetrimayum, and Ramesh Kumar Sonkar, "High port-to-port isolation dual circularly polarised microstrip patch antenna with multifunction DGS," IET Microwaves, Antennas & Propagation, vol. 14, no. 15, pp. 2035 - 2044, December 2020.

11. Nayek, Narugopal; Joshi, Mohit; Sonkar, Ramesh; Tiwari, Tapeshwar; Bhattacharjee, Ratnajit, "Design and Efficiency Enhancement of a Ka-band Industrial Gyrotron," IEEE Transactions on Plasma Science, vol. 48, no. 11, pp. 3807 - 3814, November 2020.

12. Manoranjan Minz and Ramesh Kumar Sonkar, "Numerical Modeling and Analysis of a TM Mode-Division (De)multiplexer Based on Grating Assisted Couplers," Optical and Quantum Electronics, vol. 52, no. 9, pp. 1-19, September 2020.

13. Sumantra Chaudhuri, Mohit Mishra, Rakhesh Singh Kshetrimayum, Ramesh Kumar Sonkar, Haradhan Chel, and Vivek Kumar Singh, "Rectangular DRA Array for 24 GHz ISM-Band Applications," IEEE Antennas and Wireless Propagation Letters, vol. 19, no. 9, pp. 1501-1505, July 2020.

14. Mohd. Mansoor Khan and Ramesh Kumar Sonkar, "Modulation instability in lossy and nonlinear thulium-doped fiber amplifiers in S and near-C bands: analytical and numerical approach", Optical Engineering, vol. 59, no. 4, pp. 046105, April 2020.

15. Darpan Mishra and Ramesh Kumar Sonkar, "2D Modeling of Silicon Optical PN Phase Shifter," Applied Optics, vol. 59, no. 4, pp. 998-1007, February 2020.

16. Manoranjan Minz and Ramesh Kumar Sonkar. "Design and Analysis of a Grating Assisted Hybrid Mode and Polarization (De)multiplexer," Applied Optics, vol. 59, no. 3, pp. 785-794, January 2020.

17. Darpan Mishra and Ramesh Kumar Sonkar, "Mode, Dispersion, and Loss Analysis of a Graded-Index Germanium-Doped Silicon Buried Strip Waveguide" Optical Engineering, vol. 59, no. 1, pp. 016118, January 2020.




2019

18. Sumantra Chaudhuri, Rakhesh Singh Kshetrimayum, Ramesh Kumar Sonkar, and Mohit Mishra "Dual circularly polarised travelling wave slot antenna array," Electronics Letters, vol. 55, no. 20, pp 1071-1073, October 2019.

19. Sumantra Chaudhuri, Rakhesh Singh Kshetrimayum, Ramesh Sonkar, "High inter-port isolation dual circularly polarized slot antenna with interdigital capacitor," International Journal of RF and Microwave Computer-Aided Engineering, vol. 29, no. 10, pp. e21903, October 2019.

20. Rakhesh Singh Kshetrimayum, Ramesh Sonkar, Sumantra Chaudhuri, "High inter-port isolation dual circularly polarized slot antenna with split-ring resonator based novel metasurface," AEU International Journal of Electronics and Communications, vol. 107, pp 146-156, July 2019.

21. Manoranjan Minz and Ramesh Kumar Sonkar, "Numerical Design and Analysis of a 3-channel Grating Assisted Mode-Division (De)multiplexer," Optik - International Journal for Light and Electron Optics, vol. 187, pp. 272-277, June 2019.

22. Darpan Mishra and Ramesh Kumar Sonkar, "Analysis of Germanium Doped Silicon Vertical PN Junction Optical Phase Shifter," Journal of the Optical Society of America B, vol. 36, no. 5, pp. 1348-1354, May 2019.

23. Darpan Mishra and Ramesh Kumar Sonkar, "Analysis of a Process Simulated Graded-Index Strained Silicon-Germanium Optical Phase Shifter," Optical Materials, vol. 89, pp. 604-608, March 2019.

24. Mohd. Mansoor Khan and Ramesh Kumar Sonkar, "Analytical Model for Signal and Gain Modulation on Thulium Doped Fiber Amplifiers in S and near-C Bands including Amplified Spontaneous Emission: Signal Power Analysis," Optical Engineering, vol. 58, no. 2, pp. 026103, February 2019.

25. Vaibhav Shukla, Ramesh Kumar Sonkar, Rajiv Srivastava, "Performance comparison between recirculating loop buffer-based optical packet switch architectures," Indian Journal of Physics, vol. 94, no. 7, pp. 1085-1096, July 2019.




2018 and Earlier

26. Mohd Mansoor Khan and Ramesh Kumar Sonkar, "Signal wavelength effect on overmodulation in thulium doped fiber amplifiers with amplified spontaneous emission: A simulink pedestal," Journal of Optical Communications, vol. 43, no. 1, pp. 1-8, November 2018.

27. Darpan Mishra, R. K. Sonkar, "Design and Analysis of a Graded-Index Strained SiGe Optical PN Phase Shifter", IEEE Photonics Journal, vol. 10, no. 6, pp. 1-14, November 2018.

28. Ramesh K Sonkar and Utpal Das, "F-ion implanted quantum well intermixed waveguide grating," Optical and Quantum Electronics, vol. 48, no. 1, pp. 1-7, January 2016.

29. Ramesh Kumar Sonkar and Utpal Das, "Waveguide Grating Using Quantum well Intermixing", International Journal of Research and Reviews in Applied Sciences, vol. 5, no.1, pp 43-51, October 2010.

30. Ramesh K. Sonkar and Utpal Das, "Quantum well intermixed waveguide grating", Optical and Quantum Electronics, vol. 42, no. 9, pp. 631-643, September 2011.

Conferences

2022

1. Soibam Aruna Chanu and Ramesh Kumar Sonkar, "Band Structure Analysis of Silica Clad Silicon-based 2D Photonic Crystal for C-band Applications," 5th IEEE Workshop on Recent Advances in Photonics (WRAP 2022), Mumbai, India, 4-6 March 2022.




2021

2. Gaurav Kumar Bharti and Ramesh Kumar Sonkar, "Modeling of Polarization Rotation Based All Optical Logic Switch Using Ring Resonator," Accepted for inclusion in 10th IEEE CPMT Symposium Japan (ICSJ 2021), November 10-12, 2021

3. Darpan Mishra, Manoranjan Minz, and Ramesh Kumar Sonkar, "Performance of a Pre-amorphized Traveling-wave Silicon Optical Modulator," Asia Communications and Photonics Conference, October 24-127, 2021.

4. Manoranjan Minz, Darpan Mishra, and Ramesh Kumar Sonkar, " SWG-based compact broadband two-mode multiplexer on SOI platform," Accepted for inclusion in 2021 IEEE Region 10 Symposium (TENSYMP 2021) to be held at Grand Hyatt Jeju, Republic of Korea, 23-25, August, 2021

5. Gaurav Kumar Bharti and Ramesh Kumar Sonkar "Modeling of polarization-rotation based photonic D flip-flop using a compact micro-ring resonator," Accepted for inclusion in 21st International Conference on Numerical Simulation of Optoelectronic Devices, 13-17 September 2021

6. Nayek, Narugopal; Joshi, Mohit; Sonkar, Ramesh; Tiwari, Tapeshwar; Bhattacharjee, Ratnajit, "Design of Truncated Sine-waveguide Structure for THz TWT," 22nd International Vacuum Electronics Conference, IVEC 2021, 27-30 April 2021.




2020

7. Darpan Mishra, Manoranjan Minz, and Ramesh Sonkar, "Effect of Pre-amorphization and Annealing on the Performance of a Silicon Optical Phase Shifter," OSA Frontiers in Optics + Laser Science APS/DLS, 14-17 September 2020, Virtual Web Conference.

8. Dhiman Kakati and Ramesh Kumar Sonkar, "A 2x320 Gbps Hybrid PDM-MDM-OFDM System for High-Speed Terrestrial FSO Communication," 14th Pacific Rim Conference on Lasers and Electro-Optics 2020, 3-5 August 2020, Australia.

9. Manoranjan Minz, Darpan Mishra, and Ramesh Kumar Sonkar, "Compact Polarization Beam Splitter Using Contra-Directional Gratings on SOI platform," 14th Pacific Rim Conference on Lasers and Electro-Optics 2020, 3-5 August 2020, Australia.

10. Darpan Mishra, Manoranjan Minz, and Ramesh Kumar Sonkar, "Performance Evaluation of a Quasi-TM Mode Silicon Optical Modulator," IEEE Region 10 Symposium (TENSYMP) 2020, Dhaka, Bangladesh. (Best Paper Award)

11. Sumantra Chaudhuri, Mohit Mishra, Rakhesh Singh Kshetrimayum, Ramesh Kumar Sonkar, Somen Bhattacharjee, Bhaskar Saha, “High port-to-port isolation dual circularly polarised microstrip patch antenna with multifunction DGS,” IEEE Region 10 Symposium (TENSYMP) 2020, Dhaka, Bangladesh.

12. Veerapuram Sumanth, Manish Yadav, Soibam Aruna Chanu, and Ramesh Kumar Sonkar, "Silicon Waveguides for Mid-infrared Integrated Photonics, " 8th IEEE International Conference on Photonics 2020, 16-18 March 2020, Malaysia.

13. Darpan Mishra, Manoranjan Minz, and Ramesh Kumar Sonkar, "A 2D Optimization Model for Silicon Optical PN Phase Shifter Simulation, " 8th IEEE International Conference on Photonics 2020, 16-18 March 2020, Malaysia.

14. Mohd Mansoor Khan, Ramesh Kumar Sonkar, "Propagation Loss and Non-linear Effects on Modulation Instability in Thulium Doped Fiber Amplifiers Operating in S and near-C Bands," 8th IEEE International Conference on Photonics 2020, 16-18 March 2020, Malaysia.




2019

15. Chaitanya Chauhan, Asutosh Behera, Navneet Dhar, Bidisha Das, Shweta Modak, Ramesh Kumar Sonkar, "Real Time Portable and Cost Effective Vein Finder," International Workshop on Physics of Semiconductor Devices (IWPSD) 2019, Kolkata, India December 17-20, 2019

16. Narugopal Nayek, Ramesh Sonkar, Mohit Kr. Joshi, Tapeshwar Tiwari, Ratnajit Bhattacharjee, "H-Plane Loaded Sine Waveguide TWT in G-Band," Asia-Pacific Microwave Conference (APMC) 2019, Sands Expo & Convention Centre, Level 4 & 5, Marina Bay Sands Singapore, 10 - 13 December 2019

17. Ursula Das, Prerana Mazumder, Ramesh Kumar Sonkar, "Smart LED Based Streetlight System," IEEE Workshop on Recent Advances in Photonics (WRAP) 2019, Guwahati, India, 13-14 December 2019

18. Manish Yadav, Veerapuram Sumanth, Soibam Aruna Chanu, Ramesh Kumar Sonkar, "Modal Analysis of Silicon Photonic Waveguides at Mid-IR Wavelengths," IEEE Workshop on Recent Advances in Photonics (WRAP) 2019, Guwahati, India, 13-14 December 2019

19. Manoranjan Minz, Darpan Mishra, and Ramesh Kumar Sonkar, "Design of a Hybrid Mode and Polarization Division Multiplexer," Asia Communications and Photonics Conference ACP-2019, Chengdu, China, 2-5 November 2019

20. Mohd Mansoor Khan, Ramesh Kumar Sonkar "Performance estimation of Thulium doped fiber amplifiers in S-Band including Amplified Spontaneus Emission: Ion-Ion interaction analysis," 2019 IEEE Region 10 Conference (TENCON), Kochi, Kerala, India, October 17-20, 2019

21. Mohd Mansoor Khan and Ramesh Kumar Sonkar, "An ion-ion interaction analysis-based performance estimation of thulium-doped fiber amplifiers in s-band including amplified spontaneous emission," SPIE/COS Photonics Asia 2019, Hangzhou, China.

22. Manoranjan Minz, Darpan Mishra, and Ramesh Kumar Sonkar, "Grating assisted MDM-PDM hybrid (de)multiplexer for optical interconnect applications," SPIE/COS Photonics Asia 2019, Hangzhou, China.

23. Darpan Mishra, Manoranjan Minz, and Ramesh Kumar Sonkar, "Bandwidth optimization of germanium-doped silicon optical modulator for high-speed applications," SPIE/COS Photonics Asia 2019, Hangzhou, China.

24. Mohd Mansoor Khan, and Ramesh Kumar Sonkar, "Numerical modeling and simulations on splitting of chirped optical pulses in heavily doped thulium fiber amplifiers through modal instability analysis," SPIE/COS Photonics Asia 2019, Hangzhou, China.

25. Manoranjan Minz, Darpan Mishra, and Ramesh Kumar Sonkar, "Mode-Division Multiplexer with Contra-directional Couplers," 24th Optoelectronics and Communications Conference /Photonic in Switching and Computing Conference (OECC/PSC 2019), July 7th to 11th 2019, Fukuoka, Japan

26. Narugopal Nayek, Ramesh Kumar Sonkar, and Ratnajit Bhattacharjee, "Elimination of Mode Competition in TE0n Mode Gyrotron," 41st Photonics & Electromagnetics Research Symposium (PIERS) 2019, Rome, Italy, 17 June until 20 June 2019

27. Manoranjan Minz, Darpan Mishra, and Ramesh Kumar Sonkar, "Design of a 3-channel Mode-division Multiplexer Based on Grating Assisted Couplers," 41st Photonics & Electromagnetics Research Symposium (PIERS) 2019, Rome, Italy, 17 June until 20 June 2019

28. Darpan Mishra, Manoranjan Minz, and Ramesh Kumar Sonkar, "Effect of Germanium Doping on the Performance of a Silicon Optical Modulator," 41st Photonics & Electromagnetics Research Symposium (PIERS) 2019, Rome, Italy, 17 June until 20 June 2019

29. Sumantra Chaudhuri, Rakhesh Singh Kshetrimayum, Ramesh Kumar Sonkar, and Darpan Mishra, "Dual Circularly Polarized Slot Antenna with Novel Isolator," 41st Photonics & Electromagnetics Research Symposium (PIERS) 2019, Rome, Italy, 17 June until 20 June 2019

30. Sumantra Chaudhuri, Rakhesh Singh Kshetrimayum, Ramesh Kumar Sonkar, and Darpan Mishra, "High Gain Dual Linearly Polarized Patch Antenna Array," 41st Photonics & Electromagnetics Research Symposium (PIERS) 2019, Rome, Italy, 17 June until 20 June 2019

31. Mohd Mansoor Khan, and Ramesh Kumar Sonkar, "Chirped Pulse Splitting in Heavily Doped Thulium Fiber Amplifiers through Modal Instability: Numerical Modeling and Simulation" 41st Photonics & Electromagnetics Research Symposium (PIERS) 2019, Rome, Italy, 17 June until 20 June 2019

32. Sumantra Chaudhuri, Rakhesh Singh Kshetrimayum, Ramesh Kumar Sonkar, "High Inter-port Isolation Dual Circularly Polarized Modified Franklin Microstrip Antenna", 13th European Conference on Antenna and Propagation (EuCAP) 2019, Krakow, Poland, 31 March - 5 April 2019.




2018 and Earlier

33. Darpan Mishra, Manoranjan Minz, Ramesh Kumar Sonkar, "Mode and Loss Analysis of an Ultra-Small Graded-Index Strip Waveguide for Multimode Datacenter Application", Proc. of the 7th IEEE International Conference on Photonics 2018, Malaysia, April 9-11, 2018.

34. Manoranjan Minz, Darpan Mishra, Ramesh Kumar Sonkar, "Design of a Grating Assisted Mode-Division Multiplexer", Proc. of the 7th IEEE International Conference on Photonics 2018, Malaysia, April 9-11, 2018.

35. Darpan Mishra, R. K. Sonkar, "Mode and Loss Analysis of a Graded Si1-xGex Strip Waveguide", Proc. of the 2017 Asia Communication and Photonics (ACP-2017) Conference, China, November 10-13, 2017.

36. Mohd. Mansoor Khan and Ramesh Kumar Sonkar, "Overmodulation Gain Dynamics in Thulium Doped Fiber Amplifiers Including Amplified Spontaneous Emission", Proc. of the 2017 IEEE Region 10 Conference (TENCON), Malaysia, November 5-8, 2017.

37. Darpan Mishra, Ramesh Kumar Sonkar , "Effect of Junction Profile on the Phase and Loss Characteristics of a Silicon Optical Modulator," Workshop on recent advances in Photonics, WRAP 2017, December 18-19, 2017, Hyderabad, India.

38. Taslish Chadha, Vineet Chaudhary, Rohit Jain, Riya Paul, Megha Rawat and Ramesh Sonkar, "Noninvasive in-vivo Measurement of Hemoglobin and Glucose Concentration of Human Blood," The International Conference on Fiber Optics and Photonics, December 04-08, 2016, Kanpur, India.

39. Mohd. Mansoor Khan, Ramesh Kumar Sonkar, "Analytical Model for gain modulation in Thulium doped fiber amplifiers(TDFA) operating in S-Band regime," International Conference on Light and Light based technologies, November 26-28, 2016, Tezpur, India.

40. Debottam Dutta, Siddharth Sankar Acharjee, Jigyash Bharadwaj, Pronoy Bikash Phukon, Jahidul Islam, Ramesh Kumar Sonkar, "Modelling and Design of an LED Street Lamp," International Conference on Light and Light based technologies, November 26-28, 2016, Tezpur, India.

41. Taslish Chadha, Vineet Choudhary, Rohit Jain, Riya Paul,Megha Rawat, R K Sonkar, "Non-Invasive in vivo Hemoglobin Measurement of Human Blood," International Conference on Light and Light based technologies, November 26-28, 2016, Tezpur, India.

42. Mohd. Mansoor Khan and Ramesh Kumar Sonkar, "Design and proposal of dual line-of-defense perimeter watchdog incorporating optimally designed FBG based accelerometers and strain sensors using single optical fiber", Proc. SPIE 9654, International Conference on Optics and Photonics 2015, 965413 (June 15, 2015); doi:10.1117/12.2181626.

43. Kumar Abhishek, Amodh Kant Saxena, Ramesh Kumar Sonkar, "Non-Invasive Measurement of Heart Rate and Hemoglobin Concentration Level Through Fingertip", Signal Processing, Informatics, Communication and Energy Systems (SPICES), 2015 IEEE International Conference on Year: 2015.

44. Bhagwan Raad, Ramesh Kumar Sonkar, Pravin Kondekar, "Determination of Transformer Oil Age Using Long Period Grating", Workshop on recent advances in Photonics, WRAP 2015, December 16-17, 2015, Bangalore, India.

45. Ramesh K. Sonkar and Utpal Das, "Fabrication of F-ion Implanted Quantum Well Intermixed Waveguide Grating", Photonics Global Conference, 13-16 December 2012, Singapore.

46. Utpal Das and Ramesh Kumar Sonkar, "CWDM Integrated Waveguide Gratings by InGaAsP/InP Quantum Well Intermixing", 7th International Conference on Electrical and Computer Engineering, 20-22 December 2012, Dhaka, Bangladesh.

47. Ramesh K. Sonkar and Utpal Das, "Fabrication of Waveguide Grating", XVI international Workshop on the Physics of Semiconductor Devices, December 19-22, 2011, IIT Kanpur, India.

48. Ramesh K Sonkar and Utpal Das, "Integrated Waveguide Grating Using Impurity Induced Quantum Well Intermixing", AOE 2008, Oct 30- Nov 02, 2008, Shanghai China.

49. Ramesh K Sonkar, Ajay K Srivastava and Utpal Das, "CWDM Bragg Gratings using F-Implanted QW Intermixing", EPDMS 06, Calcutta, India.

50. Ramesh K. Sonkar and Utpal Das, "Analysis of Implantation Induced Gratings for CWDM", CLEO/QELS 2005, Baltimore, Maryland, USA.

51. Ramesh K. Sonkar and Utpal Das, "InGaAs/GaAs Waveguide Grating Using Impurity Induced Quantum Well Intermixing", Accepted in IEEE Photonics Global at Singapore 2008.

52. Ramesh Kumar Sonkar and Utpal Das, "Ion Implanted CWDM Bragg Gratings", International Conference on Optoelectronics and Lasers (ICOL), December 2005, Dehradun, India.

53. R. K. Sonkar and Utpal Das, "Analysis of CWDM grating", Photonics 2004: Seventh International Conference on Optoelectronics, Fiber Optics and Photonics, December 9-11 2004, Cochin, India.

1. Recipient of the Young Faculty Research Fellowship under Visvesvaraya PhD Scheme for Electronics & IT of DeitY, GoI

2. Senior Member, IEEE

3. Senior Member, OSA

4. Recipient of Dr. Shanker Dayal Sharma Medal, for outstanding all round contribution in the graduation class of the postgraduate programs of study for the year 2003

5. Recipient of graduate studies fellowship by Indian Institute of Technology Kanpur for doing graduate studies and research at Electrical Engineering Department, IIT Kanpur

Short-term Courses / Workshops / Conferences Organized

1. TEQIP on Recent Advances in RF and Photonics, Coordinator 22-26 February 2021

2. QIP STC on Photonics and Photovoltaics: Devices, Circuits, and Metrology, Coordinator, December 11 -24, 2020

3. QIP STC on Optoelectronics and Nanophotonics, Coordinator, 06-12 November 2020

4. Organizing Member, National Symposium on Vacuum Electronics Devices and Applications, 22-24 Nov 2018

5. South Asian Workshop on Optics and Photonics, Co convener 17-18 November 2015

6. QIP STC on Optoelectronics and Optical Communication, Coordinator 16-20 September 2013

7. QIP STC on RF and Photonics: Fundamentals and Advances, Coordinator 23-27 February 2015

8. Graphical System Design Approach for Research in Power Systems, Power Electronics & Signal Processing Sponsored by National Instruments and Coordinated 27-28 September 2014

9. TEQIP on Advances in Photonics, Coordinator 25-26 February 2016

10. Tutorial Chair, 5th biennial IEEE Applied Electromagnetics Conference 18-21 December 2015

11. Organizing Member, National Conference on Communication 4-6 March 2016

12. Organizing Member, National Power Systems Conference 18-20 December 2014

13. IEEE MATLAB Workshop-2013 22-23 June, 2013

14. 1st IITG OSA Student Chapter Workshop on Optics 15-17 November, 2012

15. IEEE Workshop on Compressed Sensing and Technical Writing 6-7 April 2013

16. IEEE WORKSHOP: AdMAT14 30 -31 August, 2014

Invited Talks

1. International Workshop on Group IV Photonics, National Institute of Technology Delhi, March 15-19, 2022

2. FDP on Photonics, Global Academy of Technology, Bengaluru November 15 -19, 2021

3. AICTE QIP sponsored Online FDP on “Intelligent Nanophotonics” NITTTR Chandigarh, October 04-09, 2021.

4. Short Term Course on Integrated Optics, Punjab Engineering College (Deemed to be University) Chandigarh, January 18-21, 2021

5. International Symposium on Semiconductor Materials and Devices, ISSMD-2020, Dr. B. R. Ambedkar National Institute of Technology, Jalandhar, 31 October - 2 November 2020.

6. STC on Physical VLSI Design Techniques, NITTTR Chandigarh, June 15-19, 2020

Lab Development

1. I have developed optoelectronics and nanofabrication clean room equipped with Thermal and E-Beam Evaporator, Mask Aligner Karl Suss MJB-3 (for UV exposure), Optical Profiler Veecco Wyko NT1100, Spinner, Microwave Oven, Ultrasonic Cleaner, Reynold Chiller, Dry and Wet Benches, Millipore DI Water System, Rapid Thermal Annealing System and Plasma RIE. I have hands-on experience to operate all these equipments. Our group have also designed rapid thermal anneal system. In course of my thesis we have also designed a lamp anneal system. I have also developed waveguide loss measurement set up in the range of 1270-1610nm. This is all at IIT Kanpur.

2. I have developed the dark room lab for fiber optic system at IIT Guwahati.

3. Development of a new ‘Fabrication Facility for Silicon Photonics and Microelectronics Devices’ under DST-FIST is going on.

Program Development

• Designed and developed a new specialization in EEE as M.Tech. in RF and Photonics, revised as Microelectronics, Photonics and Radio Frequency Engineering from July 2022

Administrative and Commitee Work

1. Member DPPC, Department of EEE, IIT Guwahati (2022 – till date)

2. Member DPPC, Department of EEE, IIT Guwahati (2022 – till date)

3. Member, Equal Opportunity Cell cum Special Reservation Cell, IIT Guwahati (2022 – till date)

4. Nodal Officer, Visvesvaraya PhD Scheme, IIT Guwahati (2018 - till date)

5. Secretary DPPC, Department of EEE, IIT Guwahati (2020 - 2022)

6. Member, Faculty Selection Committee, NIT Rourkela (2017, 2019)

7. Member, Staff Selection Committee, NIT Rourkela (2017)

8. Member, Security Advisory Board, IIT Guwahati (2018-2020)

9. Member, Hospital Advisory Board, IIT Guwahati (2018-2020)

10. Member, Medical User Group, IIT Guwahati (2018-2020)

11. Member, Sports Board Committee for Physical Verification (2017-2018)

12. Treasurer, All India IIT Faculty Federation (2017-2020)

13. Warden, Brahmaputra Hostel, IIT Guwahati (2017-2019)

14. President, Faculty Forum, IIT Guwahati (2016-2020)

15. Associate Warden, Kameng Hostel, IIT Guwahati (2016-2017)

16. Coordinator, Institute Time Table, IIT Guwahati (2015-2016)

17. Convener, Squash, Inter IIT Sports Meet-2013 & 2018

18. Contingent Member, Inter IIT Staff Meet- 2013, 2016, & 2018

19. Member, Library Advisory Committee, IIT Guwahati (2014- 2017)

20. Branch Counsellor, IEEE Students Branch IIT Guwahati (2011-2014)

21. Institute Representative, JEE and GATE (2012, 2013, 2014, 2015, 2017, 2018, 2019, 2020, 2021)

22. Member for DRDO M.Tech. Interview Committee from IIT Guwahati (2016)

23. Coordinator, PhD Admission July 2015 & July 2018, Department of EEE

24. Coordinator, M.Tech. Admission July 2016 & July 2017, Department of EEE

25. Member, DURGC, Department of EEE (2016- 2018)

26. Member, DDC, Department of EEE (2019- 2022)

27. Member DUPC, Department of EEE (2015-2017)

28. Time Table Coordinator, Department of EEE (2014-2017)

29. Library Representative, Department of EEE (2014-2017)

30. Member, Scientific Officer Selection Committee 2013

31. Faculty Advisor B.Tech. 2012 Batch ECE

32. Design Lab Course Coordinator (2012-2013, 2013-2014)

33. EE101 Basic Electrical Sciences Lab Coordinator (2012-2013, 2013-2014)

34. EE102 Lab Coordinator (2017-2018)

35. Faculty, Laboratory Incharge, Electronics Circuit Lab I and II

36. Associate Faculty, Laboratory Incharge, Electronics Circuit Lab

37. Associate Faculty, Laboratory Incharge, VLSI, ADSP and Communication Lab

38. Associate Faculty, Laboratory Incharge, PCB Lab and Store

39. Member Various Tender Opening Committee (2018- till date)

Professional Memberships

1. Senior Member IEEE (80181990)

2. Senior Member Optica (924752)

3. Member SPIE (3025705)

4. Member IE (India) (M-152393-1)

5. Member, IEEE Photonics Society

6. Fellow IETE (F500542)

7. Fellow OSI (0986)

Reviewer

1. Optical and Quantum Electronics

2. Journal of Optical Communications

3. Silicon

4. Engineering and Applied Science Research

5. Laser Physics

6. Journal of Engineering Science and Technology

Course instructor at IIT Guwahati

• EE 200 (Semiconductor Devices and Circuits)

• EE 213M (Digital Circuits)

• EE 102 (Electronics Laboratory) Coordinator

• EE 510 (Semiconductor Device Modeling and Technology)

• EE 311 (VLSI Laboratory)

• EE 313 (Microelectronics Laboratory)

• EE 304 (Design Laboratory): Coordinator

• EE 101 (Electrical Sciences): Coordinator

• EE 442 (Microwave Engineering Laboratory)

• EE 630 (Photonics Integrated Circuits)

• EE 511 (Semiconductor Device Modeling)

• EE 542 (Fiber Optic System)

• EE 543 (Optic System Laboratory)

• EE 515 (Semiconductor IC Technology)

• EE 544 (Photonics Devices and Circuits)

• EE 546 (Optical Networks)

• EE 665 (Fiber Optics Communication)

• EE 643 (Silicon Photonics)

• EE 313 (Microelectronics Laboratory)

PhD Supervision

(04 completed, 01 synopsis completed, 04 ongoing)

1. Dr. Sumanta Chaudhury, Title: Dual Circularly Polarized Antennas for Full-duplex Radios, Period: July 2015 – September 2020, Completed, Regular, Joint Supervision with Prof. Rakhesh Singh Kshetrimayum

2. Dr. Darpan Mishra, Title: Enhancing the performance of a silicon photonic optical modulator using device-level engineering, Period: July 2015 – December 2020, Completed, Regular, Single Supervision

3. Dr. Manoranjan Minz, Title: Design of Hybrid (De)Multiplexers for Optical Interconnects on SOI Platform, Period: July 2015 – March 2022, Regular, Single Supervision, Completed

4. Dr. Mohd Mansoor Khan, Title: Investigations on Thulium Doped Fiber Amplifiers for Optical Communication in S and near-C Bands, Period: Dec-2013 - March 2022, Part Time, Single Supervision, Completed

5. Mr. Narugopal Nayek, Area: Vacuum Electronics Devices, Period: Dec 2017 continuing, Part Time, Joint Supervision with Prof. Ratnajit Bhattacharjee, Synopsis Completed

6. Miss. S Aruna Chanu, Area: Silicon Photonics, Period: July 2019–continuing, Regular, Single Supervision

7. Mr. Sidhartha Kumar Sahu, Area: Dielectric Resonator, Period: July 2020- continuing, Regular, Joint Supervision with Prof. Rakhesh Singh Kshetrimayum

8. Mr. Kumar Sanket, Area: Silicon Photonics, Period: July 2021–continuing, Regular, Single Supervision

9. Mr. Shamshad Alam, Area: Silicon Photonics, Period: July 2021–continuing, Regular, Single Supervision

M.Tech Supervision

1. Simran Kumari, Thesis: 2D silicon photonic crystal nanocavity design using particle swarm optimization method, Period: April 2022 – Continuing, Regular, Single Supervision

2. Rashmi Netam, Thesis: Effect of different hole shapes on the photonic bandgap in 2D photonic crystals in the SOI platform, Period: April 2022 – Continuing, Regular, Single Supervision

3. Mayank Agrawal, Thesis: Design of an Optical Antenna Using Subwavelength Grating on SOI Platform, Period: July 2021 – Continuing, Regular, Single Supervision

4. Rohit Sonawane, Thesis: Design of a Fiber to Planar Waveguide Coupler using Subwavelength Gratings, Period: July 2021 – Continuing, Regular, Single Supervision

5. Hriday Jyoti Borkakati, Thesis: Design of a Polarization Beam Splitter on SOI Platform, Period: July 2021 – Continuing, Regular, Single Supervision

6. Manish, Thesis: Mid IR Power Splitter using Silicon Photonics Platform, Period: July 2019 – July 2020, Regular, Single Supervision

7. V Sumanth, Thesis: Mid IR Gas Sensor using Silicon Photonics Platform, Period: July 2019 – July 2020, Regular, Single Supervision

8. Shiva Puri Goswami Thesis Title: Self-Heating in FinFET, Period: July 2015-June 2016, Part Time, Joint Supervision

9. Pamshangphy Raikham, Thesis: Non-Invasive Measurement Techniques for Human Blood Parameters and their Analysis of Light-Tissue interaction using a multilayered Tissue Model, Period: July 2017- July 2018, Regular, Single Supervision

10. Shubham Horh, Thesis: FDTD Analysis of Quasi-TM Mode Propagation in Silicon Strip Y-Junction Power Splitter at 1550 nm in PON system, Period: July 2017- July 2018, Regular, Single Supervision

11. Priyank Bhardwaj, Thesis Title: Full wave analysis of printed antennas and circuits using spatial domain MoM, Period: July 2013- June 2014, Regular, Joint Supervision

12. Vepuri Prasanna Vani, Thesis Title: An investigation into Beam space MIMO based Wireless Communication, Period: July 2014- July 2015, Regular, Joint Supervision

B.Tech Supervision

1. Pranav Totala (150102051) and Puneet Jangpangi (150108025), “Structural Health Monitoring in Building, Bridges and Civil Engineering” 2019

2. Sambit Mallick (140102053) and Samanwaya Chakraborty (140102077), “Explosive Detection Using Photonics Technology” 2018

3. Ravi Kumar Meena (11010830), “Simulation of a Fiber Bragg Grating based Temperature Sensor” 2016

4. Vikash Kumar (11010838) and Anirudh Birkh (11010211), “Non-invasive Measurement of Human Blood,” 2014

5. Sourabh Kumar (11010834), Akhil Kumar (11010804) and Hemraj Meena (11010231), “Design and Simulation of Fiber Lasers,” 2014

6. Pavndeep Singh (10010242) and Amrit Raj (11010208), “Fiber Bragg Grating Sensors Simulation,” 2014

7. Vinod Kumar Kala (10010265) and Ritesh Kumar (10010252), “Design and Analysis of AWG,”2013

8. Uttam Nandi (10010260), “Photonics Crystal Fiber,” 2013