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Dr. Viswas S. Nair

Asst. Professor, Electronics and Communication Engineering, School of Engineering, Amritapuri

Qualification: Ph.D
viswassnair@am.amrita.edu
ORCID Profile
Google Scholar Profile
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Research Interest: Theoretical and Experimental Study of Semiconductor Optoelectronics with Communication Applications

Bio

Dr. Viswas S. Nair serves as Assistant Professor at Amrita Vishwa Vidyapeetham. He received his B.Tech in Electronics and Communication Engineering from Rajiv Gandhi Institute of Technology, Kottayam (2006). His higher education includes M.E. Communication Engineering from BITS Pilani (2009) and Ph.D. in Electrical Engineering from IIT Kanpur (2017). He also spent some time with VSNL Mumbai, Intel Technology India Pvt. Ltd., and CSIR-CEERI-Pilani. Viswas is currently involved in teaching/research related to optoelectronics, solid-state devices, and optical communication.

Degree Name of the University Year of Passing
PhD. IIT Kanpur 2017
Publications

Journal Article

Year : 2023

Optical Beam Steering Using Vertically Actuated MEMS Grating Coupler

Cite this Research Publication : J. K. N. and V. Sadasivan, "Optical Beam Steering Using Vertically Actuated MEMS Grating Coupler," in Journal of Lightwave Technology, vol. 41, no. 23, pp. 7309-7315, 1 Dec.1, 2023, doi: 10.1109/JLT.2023.3326353.

Year : 2023

Broadband tunable basic units for nonvolatile field programmable photonic gate array

Cite this Research Publication : Govindan Nishi Nampoothiri and Viswas Sadasivan, "Broadband tunable basic units for nonvolatile field programmable photonic gate array," Journal of the Optical Society of America B, 40, 1054-1062 (2023) DOI: https://doi.org/10.1364/JOSAB.482467

Publisher : Journal of the Optical Society of America B

Year : 2022

Inverse Design of Silicon Photonic Modulators

Cite this Research Publication : M. B., H. I. Saleem and V. Sadasivan, "Inverse Design of Silicon Photonic Modulators," in Journal of Lightwave Technology, vol. 40, no. 20, pp. 6939-6945, 15 Oct.15, 2022, doi: 10.1109/JLT.2022.3189098

Publisher : IEEE

Year : 2021

Circular Optical Arrays Using Waveguide Fed 45° Angled Mirrors

Cite this Research Publication : Viswas Sadasivan, “Circular Optical Arrays Using Waveguide Fed 45° Angled Mirrors”, IEEE Journal of Selected Topics in Quantum Electronics, vol. 27, no. 1, pp. 1 - 8, 2021.

Publisher : IEEE Journal of Selected Topics in Quantum Electronics

Year : 2019

Strain and threshold reduction for a multi-wavelength blue–green laser-triad

Cite this Research Publication : Viswas Sadasivan, Paliwal, A., and Mathew, M., “Strain and threshold reduction for a multi-wavelength blue–green laser-triad”, Laser Physics, vol. 29, no. 8, p. 085802, 2019.

Publisher : Laser Physics, IOP Publishing,

Year : 2018

Nonlinear tuning in InGaAsP Embedded Rings

Cite this Research Publication : Viswas Sadasivan and Utpal Das, “Nonlinear tuning in InGaAsP Embedded Rings”, Optical and Quantum Electronics, vol. 50, no. 2, p. 76, 2018.

Publisher : Optical and Quantum Electronics

Year : 2016

InGaAsP/InP integrated waveguide photodetector pair using quantum well intermixing

Cite this Research Publication : Viswas Sadasivan, Dagar, S., and Bhowmick, T., “InGaAsP/InP integrated waveguide photodetector pair using quantum well intermixing”, Optical and Quantum Electronics, vol. 48, 2016

Publisher : Optical and Quantum Electronics

Year : 2015

Fabrication of low grass, smooth sidewall InGaAsP by methane–hydrogen inductively coupled plasma RIE through a metal lift-off mask patterned by e-beam lithography

Cite this Research Publication : Viswas Sadasivan, Dagar, S., and Das, U., “Fabrication of low grass, smooth sidewall InGaAsP by methane–hydrogen inductively coupled plasma RIE through a metal lift-off mask patterned by e-beam lithography”, Journal of vacuum science & technology. B, Microelectronics and nanometer structures: processing, measurement, and phenomena: an official journal of the American Vacuum Society, vol. 33, p. 051210, 2015

Publisher : Journal of vacuum science technology. B, Microelectronics and nanometer structures: processing, measurement, and phenomena: an official journal of the American Vacuum Society

Year : 2014

QCSE tuned embedded ring modulator

Cite this Research Publication : Viswas Sadasivan and Das, U., “QCSE tuned embedded ring modulator”, Lightwave Technology, Journal of, vol. 32, pp. 107-114, 2014

Publisher : Lightwave Technology, Journal of

Conference Paper

Year : 2015

Fabrication of InGaAsP/InP nano-photonic ridge waveguides using CH4+H2 ICP RIE and Al lift-off mask

Cite this Research Publication : Viswas Sadasivan and Utpal Das, “Fabrication of InGaAsP/InP nano-photonic ridge waveguides using CH4+H2 ICP RIE and Al lift-off mask”, in International Workshop on the Physics of Semiconductor Devices 2015 (IWPSD-15), Bangalore, 2015.

Publisher : International Workshop on the Physics of Semiconductor Devices 2015 (IWPSD-15)

Year : 2015

Embedded ring high speed modulators and switches

Cite this Research Publication : Viswas Sadasivan and Utpal Das, “Embedded ring high speed modulators and switches”, in International Conference on Computers and Devices for Communication(CODEC-15), Kolkata, India, 2015.

Publisher : International Conference on Computers and Devices for Communication(CODEC-15)

Conference Proceedings

Year : 2021

Simulation of Thin-film Transistor based Winner-take-all Circuit

Cite this Research Publication : Ramya C., Maragathaeswari B., and Viswas Sadasivan, “Simulation of Thin-film Transistor based Winner-take-all Circuit”, 2021 IEEE International Conference on Nanoelectronics, Nanophotonics, Nanomaterials, Nanobioscience Nanotechnology (5NANO). pp. 1-5, 2021.

Publisher : 2021 IEEE International Conference on Nanoelectronics

Year : 2019

Estimation of maximum range for underwater optical communication using PIN and avalanche photodetectors

Cite this Research Publication : M. P. A. Das, P. Arjun, A. S. Bhaskaran, P. S. Aravind, T. R. Aswin, and Viswas Sadasivan, “Estimation of maximum range for underwater optical communication using PIN and avalanche photodetectors”, 2019 International Conference on Advances in Computing and Communication Engineering (ICACCE). pp. 1-6, 2019.

Publisher : 2019 International Conference on Advances in Computing and Communication Engineering (ICACCE),

Year : 2019

Direct Epitaxial Lateral Overgrowth of GaN on Sapphire

Cite this Research Publication : Viswas Sadasivan and Mathew, M., “Direct Epitaxial Lateral Overgrowth of GaN on Sapphire”, The Physics of Semiconductor Devices, Proceedings of International Workshop on the Physics of Semiconductor and Devices. Springer International Publishing, Cham, pp. 263-267, 2019

Publisher : The Physics of Semiconductor Devices, Proceedings of International Workshop on the Physics of Semiconductor and Devices

Year : 2016

Embedded ring resonator in InGaAsP multi-quantum wells

Cite this Research Publication : Viswas Sadasivan and Das, U., “Embedded ring resonator in InGaAsP multi-quantum wells”, 13th International Conference on Fiber Optics and Photonics. Optical Society of America, Kanpur India, 2016.

Publisher : 13th International Conference on Fiber Optics and Photonics, Optical Society of America, Kanpur India.

Year : 2014

Parameter variation in QCSE tuned embedded ring resonator

Cite this Research Publication : Viswas Sadasivan and Utpal Das, “Parameter variation in QCSE tuned embedded ring resonator”, IEEE Region 10 Symposium (TENSYMP-14). IEEE, Kuala Lumpur, Malaysia, 2014.

Publisher : IEEE Region 10 Symposium (TENSYMP-14)

Year : 2014

Optical switching in InGaAsP/InP Embedded Ring Resonators

Cite this Research Publication : Viswas Sadasivan and Utpal Das, “Optical switching in InGaAsP/InP Embedded Ring Resonators”, International Conference on Fibre Optics and Photonics, 2014. 2014.

Publisher : International Conference on Fibre Optics and Photonics, 2014

Book Chapter

Year : 2023

Optical MEMS (microspheres and ring resonators): Overview of recent progress

Cite this Research Publication : Sadasivan, V., "Optical MEMS (microspheres and ring resonators): Overview of recent progress," in MEMS Applications in Electronics and Engineering, edited by A. K. Basu, A. Basu, S. Ghosh, and S. Bhattacharya (AIP Publishing, Melville, New York, 2023), pp. 7-1–7-70, Doi: https://doi.org/10.1063/9780735424395_007.

Publisher : AIP Publishing

Patents

Year : 2022

Circular Optical Array System Using Waveguide Fed Angled Mirrors

Cite this Research Publication : Nair, Viswas S. (Kottayam, IN) 2022 ,Circular Optical Array System Using Waveguide Fed Angled Mirrors, United States,Amrita Vishwa Vidyapeetham (Tamil Nadu, IN) 20220137310

Publisher : United States Patent Application

Year : 2016

Low loss fast electro-optically or all-optically tuned embedded ring modulator or filter

Cite this Research Publication : Viswas Sadasivan and Utpal Das, “Low loss fast electro-optically or all-optically tuned embedded ring modulator or filter”, 2016.

Publisher : Indian patent

Funded Projects
  • Title: “Shape Optimization of Optical Structures”,
    Funded by: Science and Engineering Research Board (SERB), India through their startup research grant scheme
    Period: 2020-2022
    Host Institute: Amrita Vishwa Vidyapeetham, Amritapuri
    Grant Amount: Rs. 28.7 lakh
    Status: Ongoing
  • Title: “Growth and Fabrication of Blue-green Lasers for Underwater Communication”,
    Funded by: Science and Engineering Research Board (SERB), India through SERB-NPDF scheme
    Period: 2017-2019, Started on April 7, 2017 and closed on July 14, 2017 after resigning from NPDF
    Host institute: CSIR-Central Electronics Engineering Research Institute Pilani, India.
    Grant amount: Rs. 19.6 lakh.Status: Closed
  • Title: “Fabrication of Silica Etch Mask using EBL and F Chemistry Dry Etching”,
    Funded by: Ministry of Electronics & Information Technology (MeitY) through Indian Nanoelectronics Users Program (INUP)
    Duration: 2016
    Host Institute: CeNSE, Indian Institute of Science Bangalore, India
    Grant Amount: not disclosed by INUPStatus: Completed
Awards
  • Science & Engineering Research Board (SERB) Startup Research Grant
  • Science & Engineering Research Board (SERB) National Post-Doctoral Fellowship (N-PDF).
  • Best paper award’ for the paper presented at IEEE TENSYMP’14 conference, held at Kuala Lumpur, ML
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