Education

• Ph.D in Information and Communications, Gwangju Institute of Science and Technology, Gwangju, Republic of Korea (2013).
• M.Tech in Optoelectronics and Laser Technology, ISP-CUSAT, Kochi (2001) .
• B.Tech in Electronics and Communication, NSS college of engineering, Palakkad (1994-1998).

Publications

[22] Krishnanunni R. A, Sooraj. R, "A Compact Silicon Based 1 × 2 MMI Switch Based on Carrier Injection Based Refractive Index Change", IEEE Photonics Journal, Vol 17, issue 3, 2025

[21] Krishnanunni R. A, Sooraj. R, "Investigating the performance of a novel silicon based p-i-n modulator with enhanced carrier injection", Optical and Quantum Electronics, Vol 56, 2024

[20] Sambuddha Majumder, Sooraj. R,"Diffraction limited collimation of 1550 nm Gaussian beam from a single mode fiber using cylindrical metalens", Optical and Quantum Electronics, Vol 56, 2024

[19] [19] Sambuddha Majumder, Krishnanunni R. A., and Sooraj. R, "Optimization of a GaAs/AlGaAs p-i-n heterojunction nanowire solar cell for improved optical and electrical properties," J. Opt. Soc. Am. B 40, 2684-2695, 2023

[18] Fayza K. A., Sooraj. R, "Microring resonator based optical logic gates", in ISSS Journal of Micro and Smart Systems, Vol 11, 295-316, 2022

[17] Fayza K. A., Sooraj. R, K. Park, K. Alameh, and Y. T. Lee, "Realization and optimization of optical logic gates using bias assisted carrier-injected triple parallel microring resonators", in Results in Optics vol 4, 2021

[16] Fayza K. A., Sooraj. R, K. Park, K. Alameh, A. Bengi, Hajara A. V., and Y. T. Lee, “Advanced Realization and Characterization of Directed Optical Logic Gates using Electroabsorptive Quantum-Well-based Micro Ring Resonator", in Optik vol 221, 164426, 2020

[15] K. Park, Sooraj. R, S. Kang, J.W. Min, H. Y. Hwang, Y. D. Jho, B. J. Kim, J. Kim, Y. T. Lee “Detailed carrier recombination in lateral composition modulation structure" in Applied Physics Express vol 10 issue 2, 025801, 2018

[14] K. Park, S. Kang, Sooraj. R, J.W. Min, Y. T. Lee, “Unveiling interfaces between In-rich and Ga-rich GaInP vertical slabs of laterally composition modulated structures" in Applied Physics Express vol 10 issue 2, 025801, 2017

[13] K. Park, S. Kang, Sooraj. R, J. W. Min, H. Y. Hwang, Y. D. Jho, “Robust optical properties of sandwiched lateral composition modulation GaInP structure grown by molecular beam epitaxy", Appl. Phys. Lett., vol 109, issue 26, 262103, 2016.

[12] K. Park, Sooraj. R, G. W. Ju, J. W. Min, S. J. Kang, N. S. Myung, S. Y. Yim, Y. R. Jo, B. J. Kim, and Y. T. Lee, “Optical properties and carrier dynamics of GaAs/GaInAs multiple quantum-well shell grown on GaAs nanowire by molecular beam epitaxy", in Curr. Appl. Phys., vol 16, 1622-1626, 2016.

[11] E. K. Kang, Y. W. Lee, Sooraj. R, J. K. Lee, H. J. Choi, G. W. Ju, J. W. Min, Y. M. Song, I. B. Sohn, and Y. T. Lee, “4 channel  10 Gb/s bidirectional optical subassembly using silicon optical bench with precise passive optical alignment" in Optics Express vol 24, issue 10, 10777-10785, 2016.

[10] K. W. Park, S. J. Kang, Sooraj. R, J. W. Min, S. K. Lee, and Y. T. Lee, “Growth optimization of InAs/GaAs quantum dots and performance enhancement of GaAs tunnel diode by embedding quantum dots for solar cell application" in Semiconductor Science and Technology vol 30, issue 7, 075008 2015.

[9] K.W. Park, S. J. Kang, Sooraj. R, J.W. Min, S. K. Lee, M. S. Park, and Y. T. Lee, “Improved performance of GaAs tunnel diode by embedding InAs quantum dot layer for tandem solar cells" in Applied Physics Express vol 8, issue 6, 062302 2015.

[8] K.W. Park, C. Y. Park, Sooraj. R, Y. R. Jo, B. J. Kim, and Y. T. Lee, “Observation and tunability of room temperature photoluminescence of GaAs/GaInAs core-multiple-quantum-well shell nanowire structure grown on Si (100) by molecular beam epitaxy,” in Nanoscale Research Letters, vol 9:626, 2014.

[7] K.W. Park, C. Y. Park, Sooraj. R, S. J. Kang, H. Y. Hwang, Y. D. Jho, Y. R. Jo, B. J. Kim and Y. T. Lee, “Enhancement of minority carrier lifetime of GaInP with lateral composition modulation grown by molecular beam epitaxy,” in Journal of Applied Physics, vol 116, issue 4, 043556-043563, 2014.

[6] S. J. Kang, K.W. Park, Sooraj. R and Y. T. Lee, "Numerical analysis of GaAs/GaAs tunnel junction employing InAs intermediate layer for multi-junction solar cells and concentrated photovoltaic applications", in Journal of Physics: Conference Series 490, 012178 2014.

[5] J. B. Kim, C. I. Yeo, Y. H. Lee, Sooraj. R, and Y. T. Lee, “Broadband antireflective silicon nanostructures produced by spin-coated Ag nanoparticles,” in Nanoscale Research Letters, vol 9, issue 54, 2014.

[4] K. W. Park, C. Y. Park, Sooraj. R and Y. T. Lee, “Effect of post annealing process on the optical properties of lateral composition modulation GaInP structure grown by molecular beam epitaxy,” in Journal of Materials Science, vol 49, issue 3, 1034-1040, February 2014.

[3] B. H. Na, G. W. Ju, H. J. Choi, S. K. Lee, Sooraj. R, Y. C. Cho, Y. H. Park, C. Y. Park, and Y. T. Lee, “Coupled tandem cavities based electro-absorption modulator with asymmetric tandem quantum well for high modulation performance at low driving voltage,” in Optics Express, vol 21, issue 23, 27924-27932, 2013.

[2] Sooraj. R, A. Datta, K. Alameh and Y. T. Lee, “GaAs based long wavelength microring resonator optical switches utilising bias-assisted carrier injection induced refractive index change,” in Optics Express, vol 20, issue 14, 15610-15627, 2012.

[1] Sooraj. R, K. Alameh and Y. T. Lee,“Design and analysis of electroabsorptive quantum well based double ring resonators for wavelength switching applications,” in Optical and Quantum Electronics, vol 41, 635-644, 2009.