Spotlight
About Us
Facilities
Research Divisions
Faculty Profiles
M.Tech (SSEM)
Physics Association
Departmental Faculty Search Committee
TPSC
Rajesh Kumar
Rajesh Kumar Assistant Professor rajeshfph[at]iitr.ac.in +91-1332-28 4869
Areas of Interest
  • Optoelectronics, Electro-Optic Switches, Lasers,Photodetectors,
  • Nano-and-Micro-Photonics, Optical Memories, Optical Waveguides, Resonators, Filters
  • CMOS Photonics, Grating Couplers, Modulators, Filters, Photo-diodes and Photo-transistors
  • Optical Signal Processing(Experimental), Wavelength Conversion, Format Conversion,Multiplexing and Demultiplexing
  • Silicon Photonics, Devices and Subsystems, Designs and Masurements, Optical Interconnects, Optical Logic
Professional Background
FromToDesignationOrganisation
20082012Research EngineerIMEC(Belgium)
20122013Research FellowORC, Southampton University, UK
20132015Research AssociateUniversity of Colorado Boulder, USA
20152015Visiting FacultyIIIT Allahabad
2015Till dateAssistant ProfessorIIT Roorkee
Educational Details
DegreeSubjectUniversityYear
Ph.D.Photonics EngineeringGhent University-IMEC (Belgium)2012
M.Tech.Optoelectronics and Optical CommunicationIIT Delhi2008
Administrative Background
FromToDesignationOrganisationLevel
2016Till dateOfficer-in-Charge: Electronics LabIIT Roorkee
20162016Member: M.Tech. Programme Review CommitteIIT Roorkee
20162016Member: B.Tech. Programme Review CommitteIIT Roorkee
20162017Co-ordinator: Cognizance/ThomsoIIT Roorkee
2016Till dateMember: DRCIIT Roorkee
2016Till dateOfficer-in-Charge: Microprocessor LabIIT Roorke
2017Till dateConvenor-Department Faculty Search CommitteeIIT Roorkee
Memberships
  • OSA, Member
  • IEEE Photonics Society, Member
Teaching Engagements
TitleCourse CodeClass NameSemester
Analog and Digital electronicsPHN-102B.Tech. (Engineering Physics)Spring
Engineering Analysis and DesignPHN-205 B.Tech. (Engineering Physics)Autumn
Electronics LabPH-302Integrated M.Sc.(Physics)Spring
OptoelectronicsPHN-712M.Tech. (SSEM)Spring
Projects and Thesis Supervised
Title of ProjectNames of Students
Electrical Simulations of GST Based memoryMunendra Pal
GST coated SOI Optical WaveguidesShubham Singh
Visits to outside institutions
Institute VisitedPurpose of VisitDate
VUB BrusselsResearch CollaborationMarch 2009
Technical University of EindhovenProject meetingApril 2009
IBM Zurich Research LabProject meetingJan. 2010
LPN (CNRS)-Paris( Marcoussis Campus)Project meeting May 2010
IBM Zurich Research LabProject meetingFeb 2011
Technical University of EindhovenProject meetingJune 2011
IBM TJ Watson Research CenterResearch TalkApril 2013
IISc BangaloreResearch CollaborationFeb 2016
CSIO ChandigarhPotential Collaboration June 2016
SCL ChandigarhPotential CollaborationJuly 2016
R&D Center of Excellence, Sterlite AurangabadResearch Collaboration07/07/2017
Invitations
TopicOrganistaionCategoryYear
All-optical flip-flopsPhotonics@be (Belgium)T2009
Microdisks : From laser to flip-flops.....and moreIIT DelhiI2009
III-V-on-silicon microdisks for on- and off-chip all-optical networks (invited), INTEL, Santa Clara, CA, USA, March 2012intel(Santa Clara), USAI2012
InP-on-silicon microdisks for on- and off-chip all-optical communicationTNO, Delft, The NetherlandsI2012
CMOS compatible and Native CMOS Photonic Devices for Optical Interconnects and CommunicationIISc Bangalore (India)I2016
CMOS compatible and Native CMOS Photonic Devices for Optical Communication Sterlite Optical Technologies-AurangabadI2017
National International Collaboration
TopicOrganisationLevel
Silicon PhotonicsIISc BangaloreRP
GST based PhotonicsIIIT AllahabadRP
Refereed Journal Papers

PUBLICATIONS SUMMARY

  • International journal papers published: 13 (1 invited, 12 contributed, including one in Nature and one in Nature Photonics)
  • International conferences papers published:  35 (13 invited, 22 contributed)
  • Total number of citations: 950+
  • h index: 11

International Journals

  1. M. Tolani, Sunny, R.K. Singh, K. Shubham, and R. Kumar, “Two-Layer Optimized Railway Monitoring
    System using Wi-Fi and ZigBee Interfaced Wireless Sensor Network”, IEEE Sensors Journal, 17(7), pp.2241-48, 2017.
  2. C. Sun, M. Wade, M. Georgas, S. Lin, L. Alloatti, B. Moss, R. Kumar, A. Atabaki, F. Pavanello, J. M. Shainline, J. S. Orcutt,   R. Ram, M. Popovic and V. Stojanovic, A 45nm CMOS-SOI Monolithic Photonics Platform with Bit-Statistics-Based Resonant Microring Thermal Tuning”, IEEE Journal of Solid State Circuits, vol.51(4), pp. 893-907(2016).
  3. C. Sun, M. T. Wade, Y. Lee, J. S. Orcutt, L. Alloatti, M. S. Georgas, A. S. Waterman, J. M. Shainline, R. R Avizienis, S. Lin, B. R.  Moss, R. Kumar, F. Pavanello, A. H. Atabaki, H. M.  Cook, A. J.  Ou, J. C. Leu, Y.-H. Chen, K. Asanovic, R. J. Ram, M. A.  Popovi?, and V. M.  Stojanovic, “Single-chip microprocessor that communicates directly using light”, Nature, 528(534), pp.534-538 (2015). 
  4. T. Van Vaerenbergh, M. Fiers, P. Mechet, T. Spuesens, R. Kumar, G. Morthier, B. Schrauwen, J. Dambre and P. Bienstman, “ Cascadable excitability in microrings”, Optics Express, 20(18), pp.20292-20308 (2012).
  5. J. Lloret, R. Kumar, S. Sales, F. Ramos, G. Morthier, P. Mechet, T. Spuesens, D. Van Thourhout, N. Olivier, J.-M. Fedeli and J.Capmany, Ultra-compact electro-optic phase modulator based on III-V-on-silicon microdisk resonator”, Optics Letters, 37(12), pp.2379-2381 (2012).
  6. R. Kumar, T. Spuesens, P. Mechet, N. Olivier, J.- M. Fedeli, P. Regreny, G. Roelkens, D. Van Thourhout and G. Morthier, "10Gbit/s all-optical NRZ-OOK to RZ-OOK format conversion in an ultra-small III-V-on-silicon microdisk fabricated in a CMOS pilot line ", Optics Express, 19(24), pp. 24647-24656 (2011).
  7. R. Kumar, T. Spuesens, P. Mechet, P. Kumar, O.Raz, N. Olivier, J.- M. Fedeli, G. Roelkens, R. Baets, D. Van Thourhout and G. Morthier, "Ultra-fast and bias-free all-optical wavelength conversion using III-V-on-silicon technology", Optics Letters, 36(13), pp. 2450-2452 (2011).
  8. H. D. Jung, R. Kumar, P. Regreny, H. J. S. Dorren, T. Koonen and O. Raz, "Analog modulation characteristics of InP membrane microdisc laser for in-building networks", Electronics Letters, 47(2), pp. 121-123 (2011).
  9. D. Van Thourhout, T. Spuesens, S. Selvaraja, L. Liu, G. Roelkens, R. Kumar, G. Morthier, P. R. -Romeo, , F. Mandorlo, O. Raz, C. Kopp, and L. Grenouillet, "Nanophotonic devices for optical Interconnect", IEEE JSTQE (invited), 16(5), pp. 1363-1375 (2010).
  10. R. Kumar, L. Liu, G. Roelkens, E.-J.Geluk, T. de Vries, F. Karouta, P. Regreny, D. Van Thourhout, R. Baets and G. Morthier, "10GHz all-optical gate based on a III-V/SOI Microdisk ", IEEE Photonics Technology Letters, 22(13), pp. 981-983 (2010).
  11. L. Liu, R. Kumar, K. Huybrechts, T. Spuesens, G. Roelkens, E.-J. Geluk, T. de Vries, P. Regreny, D. Van Thourhout, R. Baets and G. Morthier, "An ultra-small, low-power, all-optical flip-flop memory on a silicon chip", Nature Photonics, 4(3), pp. 182-187 (2010).
  12. G. V. Prakash, K. Pradeesh, A. Kumar, R. Kumar, S. V. Rao, M. L. Markham and J. J. Baumberg, “Fabrication and optoelectronic characterisation of ZnO photonic structures”, Materials Letters, 62(8-9), pp. 1183-1186 (2008).
  13. J. Kaur, R. Kumar and M.C. Bhatnagar, “Effect of indium-doped SnO2 nanoparticles on NO2 gas sensing properties”, Sensors and Actuators B : Chemical, 126(2), pp. 474-484 (2007).

International Peer Reviwed Conferences

  1. C. Sun, M.  Wade, Y. Lee, J.  Orcutt, L. Alloatti, M. Georgas, A. Waterman, J. Shainline, R.  Avizienis, S. Lin, B. Moss, R. Kumar, F. Pavanello, A. Atabaki, H. Cook, A. Ou, J. Leu, Y.-H. Chen, K. Asanovic, R.  Ram, M. A. Popovic, V. Stojanovic, "Microprocessor Chip with Photonics I/O"(Invited),”, The Optical Fiber Communication Conference (OFC) 2017, United States, pp. paper W1A.1, (2017)
  2. F. Pavanello, M.T. Wade, J. Notaros, J. M. Shainline, C. V. Poulton, C. Sun, M. Georgas, L. Alloatti, A.  Atabaki, R. Kumar, B. Moss, S. Lin, R. J. Ram, V. Stojanovic, and M. A. Popovic,  “Efficient nanoscale photonic devices and monolithic electronic-photonic subsystems in sub-100 nm SOI CMOS”,  (Invited) Photonics Conference(IPC) 2015.
  3. C. Sun, M. Wade, M. Georgas, S. Lin, L. Alloatti, B. Moss, R. Kumar, A. Atabaki, F. Pavanello, R. Ram, M. Popovi? and V. Stojanovi?, “A 45nm SOI Monolithic Photonics Chip-to-Chip Link with Bit-Statistics-Based Resonant Microring Thermal Tuning”, IEEE VLSI Symposia 2015.
  4. Milos A. Popovic, Mark T. Wade, Jason S. Orcutt, Jeffrey M. Shainline, C. Sun, Michael Georgas, Benjamin Moss, F. Pavanello, J. Notaros, L. Alloatti, R. Kumar, Yu-Hsin Chen, Amir H. Atabaki, J. Leu, Vladimir Stojanovic, and R. J. Ram “Photonics as a More-than-Moore Device Technology within Sub-100 nm SOI CMOS”, (Invited),”  (paper number 150306031339) in PIERS (Progress In Electromagnetics Research Symposium), 2015.
  5. M. T. Wade, F. Pavenello, J. S. Orcutt, R. Kumar, J. M. Shainline, V. Stojanovic, R. Ram  and M. A. Popovic, “ Scaling Zero-Change Photonics: An Active Photonics Platform in 32nm Microelectronics SOI CMOS Process”, Conference on Lasers and Electro-Optics (CLEO) 2015, United States, pp.paper SW4N.1, 2015
  6. M.T. Wade, F. Pavanello, R. Kumar, C.M. Gentry, A. Atabaki, R. Ram, V. Stojanovic and M.A. Popovic, “75% efficient wide bandwidth grating couplers in a 45 nm microelectronics CMOS process,” IEEE Optical Interconnects Conference (OI) 2015, pp. 46-47, 2015.
  7. M.A. Popovi?, M.T. Wade, J.S. Orcutt, J.M. Shainline, C. Sun, M. Georgas, B. Moss, R. Kumar, L. Alloatti, F. Pavanello, Y.H. Chen, K. Nammari, J. Notaros, A. Atabaki, J.C. Leu, V. Stojanovic, R.J. Ram, “Monolithic Silicon Photonics in a Sub-100nm SOI CMOS Microprocessor Foundry: Progress from Devices to Systems (Invited),” SPIE Photonics West: OPTO Silicon Photonics X, February 2015, paper 9367-66.
  8. M. T. Wade, R. Kumar, K. Nammari, C. M. Gentry, J. M. Shainline, J. S. Orcutt, A. Tamma, R. Ram, V. Stojanovic  and M. A. Popovic, “Unidirectional Chip-to-Fiber grating couplers in unmodified 45nm CMOS technology”, Conference on Lasers and Electro-Optics (CLEO) 2014, United States, pp. paper STh3M (2014).
  9. M. T. Wade, J. M. Shainline, J.  S. Orcutt, C. Sun, R. Kumar, B. Moss, M. Georgas, V. Stojanovic, R. J. Ram and M. A. Popovic, “Energy-efficient active photonics in zero change, state-of-the-art CMOS process ”, The Optical Fiber Communication Conference and Exposition and The National Fiber Optic Engineers Conference (OFCNFOEC) 2014, United States, pp. paper Tu2E.7, (2014).
  10. T. Van Vaerenbergh, M. Fiers, P. Mechet, T. Spuesens, R. Kumar, G. Morthier, K.T Vandoorne, B. Schneider, B. Schrauwen, J. Dambre and P. Bienstman, “Characterization of cascadable excitability in a silicon-on-insulator microring”, Annual Symposium of the IEEE Photonics Benelux Chapter, Belgium, pp.119-122 (2012).
  11. T. Van Vaerenbergh, M. Fiers, P. Mechet, T. Spuesens, R. Kumar, G. Morthier, K.T Vandoorne, B. Schneider, B. Schrauwen, J. Dambre and P. Bienstman, “ Self-pulsation and excitability mechanism in silicon-on-insulator microrings”,  Asia Communications and Photonics Conference (ACP) 2012, China, pp. paper ATh4B,  (2012).
  12. G. Roelkens, S. Keyvaninia, S. Stankovic, M. Tassaert, N. Hattasan, A. Gassenq, P. De Heyn, Y. De Koninck, P. Mechet, R. Kumar, M. Muneeb, D. Vermeulen, G. Morthier, R. Baets and D. Van Thourhout, “III-V-on-silicon membrane photonics for near-infrared and mid-infrared applications”,16th European Conference on Integrated Optics (ECIO 2012) (invited), Spain, (2012).
  13. R. Kumar, T. Spuesens, P. Mechet, N. Olivier, J.- M. Fedeli, P. Regreny, G. Roelkens, D. Van Thourhout and G. Morthier, "10Gbit/s Bias-free and Error-free All-optical NRZ-OOK to RZ-OOK Format Conversion Using a III- V-on-silicon Microdisk Resonator ", The Optical Fiber Communication Conference and Exposition and The National Fiber Optic Engineers Conference (OFCNFOEC) 2012, United States, pp. paper JW2A.77, (2012).
  14. R. Kumar, T. Spuesens, P. Mechet, J.– M. Fedeli, N. Olivier, P. Regreny, G. Roelkens, D. Van Thourhout, G. Morthier, "All-optical de-multiplexing of 10Gbps data using III-V/SOI microdisk resonators", Annual Symposium of the IEEE Photonics Benelux Chapter, Belgium, pp. 89-92 (2011).
  15. G. Morthier, P. Mechet, R. Kumar, G. Roelkens, T. Spuesens, T. De Vries, E. J. Geluk, P. Regreny, R. Baets, and D. Van Thourhout, "Progress in heterogeneously integrated silicon-InP laser diodes for on-chip all-optical networks and signal processing", Frontiers in Optics(FiO) 2011 (invited), United States, pp. paper FWBB4 (2011).
  16. G. Roelkens, S. Stankovic, S. Keyvaninia, P. Mechet, R. Kumar, T. Spuesens, G. Morthier, R. Baets, D. Van Thourhout, M. Lamponi, G. Duan, Y. Halioua, F. Raineri and R. Raj, "Laser sources on a heterogeneous III- V/silicon platform", IEEE Photonics Conference(IPC) 2011 (invited), United States, pp. 395-396 (2011).
  17. R. Kumar, T. Spuesens, P. Mechet, J.– M. Fedeli, N. Olivier, P. Regreny, G. Roelkens, D. Van Thourhout and G. Morthier, "Proof-of-concept Demonstration of an All-Optical De-multiplexer Using III-V/SOI Microdisk Resonator Fabricated in a CMOS Pilot Line", IEEE Photonics Conference (IPC) 2011, United States, pp. 127-128 (2011).
  18. R. Kumar, T. Spuesens, P. Mechet, P. Regreny, J.- M. Fedeli, N. Olivier, G. Roelkens, D. Van Thourhout and G. Morthier, "All-optical de-multiplexing using III-V/SOI microdisk resonators", European Semiconductor Laser Workshop (ESLW), Switzerland, (2011).
  19. R. Kumar, T. Spuesens, P. Mechet, P. Regreny, N. Olivier, J.-M. Fedeli, G. Roelkens, D. Van Thourhout and G. Morthier, "10Gbps bias-free all-optical wavelength conversion using InP-microdisk resonators heterogeneously integrated onto SOI ", European Conference on Optical Communications (ECOC) 2011, Switzerland, pp. paper We.9.LeSaleve.3 (2011).
  20. O. Raz, H.J.S.Dorren, R. Kumar, G. Morthier, P. Regreny and P. Rojo-Romeo, "50 fJ-per-bit, high Speed, directly modulated light sources for on-chip optical data communications", The Optical Fiber Communication Conference       Exposition and The National Fiber Optic Engineers Conference (OFCNFOEC) 2011, United States, pp. paper OMM5 (2011).
  21. P. Mechet, L. Liu, R. Kumar, K. Huybrechts, T. Spuesens, G. Roelkens, E.-J. Geluk , T. De Vries , P. Regreny , D. Van Thourhout, R. Baets and G. Morthier, "Heterogeneously integrated microdisk lasers for optical interconnects and optical logic", SPIE Photonics West 2011(invited), 7913, United States, pp. 791319 (2011).
  22. O. Raz, H. D. Jung, R. Kumar, P. Regreny, T. Koonen and H. J. S. Dorren, "Integrated InP membrane light sources for analog CMOS photonic transmitters", Annual Symposium of the IEEE Photonics Benelux Chapter, Netherlands, pp. 177-180 (2010).
  23. R. Kumar, P. Kumar, G. Roelkens, L. Liu, P. Regreny, T. de Vries, D. Van Thourhout, R. Baets and G. Morthier, "Performance analysis of III-V/SOI microdisk based all-optical gate for on-chip interconnects", Annual Symposium of the IEEE Photonics Benelux Chapter, Netherlands, pp. 129-131 (2010).
  24. K. Huybrechts, L. Liu, R. Kumar, T. Spuesens, G. Roelkens, E.J. Geluk, T. De Vries, P. Regreny, D. Van Thourhout, R. Baets and G. Morthier, "All-optical flip-Flops using electrically pumped microdisk lasers integrated on silicon ", IEEE Photonics Society Annual Meeting 2010 (invited), United States, p.paperMH1,  (2010).
  25. O. Raz, L. Liu, R. Kumar, G. Morthier, P. Regreny and H.J.S. Dorren, “A single InP membrane disc cavity for both transmission and detection of 10Gb/s signals in on-chip interconnects”, European Conference on Optical Communications (ECOC) 2010, Italy, pp. paper P2.12, (2010).
  26. G. Roelkens, D. Vermeulen, L. Liu, T. Spuesens, R. Kumar, P. Mechet, K. Huybrechts, S. Keyvaninia, S. Stankovic, M. Tassaert, P. De Heyn, K. Komorowska, S. Selvaraja, D. Van Thourhout, G. Morthier, R. Baets and R. Halir, "III-V/silicon photonic integrated circuits for FTTH and optical interconnect", The Fifith international Conference on Broadband and Biomedical Communications (IB2COM) 2010 (invited), Spain, (2010).
  27.  J. Hofrichter, O. Raz, F. Horst, N. Chrysos, C. Minkenberg, T. de Vries, H. J. S. Dorren, R. Kumar, L. Liu and B.-J. Offrein, "A fast and comprehensive microdisc laser model applied to all-optical wavelength conversion", Integrated Photonics Research, Silicon and Nano Photonics (IPR), Photonics in Switching (PS) 2010, United States, pp. PTuA2  (2010).
  28. G. Morthier, L. Liu, R. Kumar, P. Mechet, K. Huybrechts, G. Roelkens, T. Spuesens, T. de Vries, E.J. Geluk, P. Regreny, R. Baets and D. Van Thourhout, "Heterogeneous InP on SOI integration for the realization of all- optical logic devices", Integrated Photonics Research, Silicon and Nano Photonics (IPR), Photonics in Switching (PS) 2010 (invited), United States, pp. IWF2,  (2010).
  29. J. Hofrichter, F. Horst, N. Chrysos, C. Minkenberg, R. Kumar, L. Liu, G. Morthier, T. de Vries and B.J. Offrein, "Digital all-optical signal processing using microdisk lasers", Integrated Photonics Research, Silicon and Nano Photonics (IPR), Photonics in Switching (PS)2010, United States, pp. PTuA3 (2010).
  30. G. Morthier, R. Kumar, F. Raineri, R. Raj, J. Hofrichter, N. Chrysos, B.J. Offrein, R. Zhang, J. van der Tol, O. Raz and H.J.S Dorren, "Overview of the EU FP7-project HISTORIC", Proceedings of SPIE - Silicon Photonics and Photonic Integrated Circuits II 7719 (invited), Belgium, pp. 771908, (2010).
  31. K. Huybrechts, L. Liu, R. Kumar, T. Spuesens, G. Roelkens, E.-J. Geluk, T. de Vries, M. Smit, P. Regreny, P. Rojo-Romeo, D. Van Thourhout, R. Baets and G. Morthier, "Digital photonics using InP microdisk lasers heterogeneously integrated on Silicon-on-Insulator", European Conference on Integrated Optics (ECIO) 2010 (invited), United Kingdom, pp. WeF1, (2010).
  32. O. Raz, L. Liu, R. Kumar, G. Morthier, D. Van Thourhout, P. Regreny, P. Rojo-Romeo, T. de Vries and H.J.S. Dorren, "Compact, low power and low threshold electrically pumped micro disc lasers for 20Gb/s non return to zero all optical wavelength conversion", The Optical Fiber Communication Conference and Exposition and The National Fiber Optic Engineers Conference (OFCNFOEC) 2010, United States, pp. OMQ5, (2010).
  33. R. Kumar, K. Huybrechts, L. Liu, T. Spuesens, G. Roelkens, E.-J. Geluk, T. de Vries, P. Regreny, D. Van Thourhout, R. Baets and G. Morthier, "An ultra-small, low-power all-optical flip-flop memory on a silicon chip", The Optical Fiber Communication Conference and Exposition and The National Fiber Optic Engineers Conference (OFCNFOEC) 2010, United States, pp. OTuN7, (2010).
  34. R. Kumar, L. Liu, G. Roelkens, E.-J. Geluk , T. de Vries, P. Regreny, D. Van Thourhout, R. Baets and G. Morthier, "10GHz all-optical gate on a silicon chip", The Optical Fiber Communication Conference and Exposition and The National Fiber Optic Engineers Conference (OFCNFOEC) 2010, United States, pp. JWA44 (2010).
  35. R. Kumar, L. Liu, G. Roelkens, G. Morthier and R. Baets, "Simple and accurate measurements to characterize microdisk lasers for all-optical flip-flop operation", Annual Symposium of the IEEE Photonics Benelux Chapter, Belgium, pp. 81-84 (2009).