Welcome to Silicon Photonics Research Group (SiPhRG)

We are recruiting new members for the 2025 Fall semester (Aug-Dec 2025)! 

We are currently looking for highly motivated candidates for a mini-project (5th semester), an integrated mini-project-BTP for a 4-year course, and an integrated mini-project-M.Tech thesis work for dual-degree students in the Electronics and Communication Engineering department at LNMIIT, Jaipur. If interested, please send your CV to harshvardhan.kumar@lnmiit.ac.in; siphrg@gmail.com ✉︎.

Note: The above positions are only for LNMIIT ECE/CCE students. 

Silicon Photonics Research Group..!!

Welcome to Silicon Photonics (SiPh) Research Group!

The Silicon Photonics Research Group, consisting of approximately 10 members, is affiliated with the Department of Electronics and Communication Engineering at The LNM Institute of Information Technology in Jaipur, India. Dr. Harshvardhan Kumar leads the group, which has been engaged in photonics device research for numerous years.  

The research focus encompasses integrated photonics, spanning from design through fabrication to application-oriented studies. The primary focus areas encompass silicon photonics and the heterogeneous integration of Group-IV alloys. The application area is extensive and encompasses fiber-optic telecommunication and data communication, computing, sensing, and medicine. Furthermore, the group also emphasizes the design of photonic devices for the THz band. The team utilizes advanced simulation software known as COMSOL Multiphysics. Additionally, the group collaborates with numerous international universities, including the University of Stuttgart (Germany), National Taiwan Normal University (Taiwan), National Yang Ming Chiao Tung University (Taiwan), and the National University of Malaysia (Malaysia), among others. The group's research results have resulted in a breakthrough in Si photonics. 

The primary research areas include silicon nanophotonics, heterogeneous integration, optical communication, photonic sensors for bio, chemical, and gas applications, as well as photonic integrated circuits designed for biomedical uses in the near-infrared (NIR), mid-infrared (MIR), and terahertz (THz) wavelength ranges. The silicon nanophotonics research specifically emphasizes the design and fabrication of silicon and silicon-on-insulator (SOI) based photonic devices, including phototransistors, p-i-n photodiodes, single-photon avalanche diodes (SPAD), avalanche photodiodes (APDs), metal-semiconductor-metal (MSM) photodetectors, modulators, and sensors. This work utilizes standard COMSOL Multiphysics and Molecular Beam Epitaxy (MBE) techniques that are compatible with CMOS processing.

Furthermore, the group is associated with the LNMIIT Centre for VLSI and Embedded System Design (C-VESD). 

If you are excited to know more about me and my work, feel free to connect through email. 

Email: siphrg@gmail.com; harshvardhan.kumar@lnmiit.ac.in 

Latest Updates

Recent Student's Achievement: 

Latest Research Articles:

1. Harshvardhan Kumar, A. Sinha, and P. S. Menon, "Simulation of Germanium-Tin-Based n+/i-Well Dot Single-Photon Avalanche Diode for Fiber-Optic Telecommunication Networks," 2025 9th IEEE Electron Devices Technology & Manufacturing Conference (EDTM), Hong Kong, Hong Kong, 2025, pp. 1-4, doi: 10.1109/EDTM61175.2025.11040834. 

2. Harshvardhan Kumar, N. Soni and J. Yadav, “Chip-Scale Ge1-xSnx-based Uniform Cross-Slot Optical Waveguide Sensors for Methane Detection in Mid-Infrared Region,” in Journal of the Optical Society of America B (JOSA B), 2025, DOI: https://doi.org/10.1364/JOSAB.565226 

3. Harshvardhan Kumar, B. Agarwal, and S.-J. Chen, "Improved Performance of Near-Infrared Si1−xSnx/Si Metal-Oxide-Semiconductor Field-Effect Phototransistors by Utilizing the Grating-Gate," in IEEE Sensors Letters, vol. 9, no. 7, pp. 1-4, July 2025, Art. no. 3502504, doi: 10.1109/LSENS.2025.3582507.