Silicon Photonics Research Group..!!

Welcome to the 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, and 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 commercially available 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

Latest Research Articles:

1. Harshvardhan Kumar, A. Sinha, P. S. Menon, and J. Tater, "A Novel n+/i-Well Dot Ge₁₋ₓSnₓ-on-Si Single-Photon Avalanche Photodiode for High-Fill-Factor Room-Temperature Quantum Applications," in IEEE Transactions on Quantum Engineering, vol. 7, pp. 4101311-4101311, 2026, Art no. 4101311, doi: 10.1109/TQE.2026.3696722. 

2. Harshvardhan Kumar and J. Tater, "Temperature-dependent analysis of Ge1-xSnx-based single-photon avalanche diodes for cryogenic applications," 2026 10th IEEE Electron Devices Technology & Manufacturing Conference (EDTM), Penang, Malaysia, 2026, pp. 1-3, doi: 10.1109/EDTM65772.2026.11497278. 

3. Harshvardhan Kumar, Y. Bijawat and P. S. Menon, "Impacts of Temperature on the Performance of Ge1−xSnx-based Mid-infrared Light-Emitting Diodes on Si Substrate," 2026 10th IEEE Electron Devices Technology & Manufacturing Conference (EDTM), Penang, Malaysia, 2026, pp. 1-3, doi: 10.1109/EDTM65772.2026.11497858.