Projects

Current Project

Engineering Spin-Photon Coupling in Semiconductor Spin Qubits Platform

UNSW Sydney

I address key challenges in spin qubits by enhancing spin–photon coupling mechanisms within semiconductor spin qubit architectures, with the goal of enabling scalable quantum information processing. Semiconductor spin qubits — valued for their compatibility with CMOS technology and long coherence times — face major obstacles when interfacing with photonic modes, a crucial step for quantum communication and distributed quantum computing. My research focuses on developing and optimizing spin–photon interfaces through electric dipole spin resonance (EDSR) and cavity quantum electrodynamics (cQED). By overcoming critical limitations such as decoherence, limited coupling efficiency, and scalability constraints, my work aims to advance hybrid quantum systems in which solid-state qubits can be seamlessly networked through photonic channels.

Previous Projects

Development of Electro-Optic Control for Miniaturised Satellite QKD Transmitter

Space Applications Center (ISRO), Ahmedabad

I was involved in the development of a satellite-based, decoy-state Quantum Key Distribution (QKD) transmitter. The system was designed to eliminate the need for eight separate lasers by integrating a Mach–Zehnder Intensity Modulator (MZM) and a Polarization Modulator (PM) to implement the BB84 protocol. This approach reduces laser distinguishability and mitigates photon-number-splitting (PNS) attacks. System-level simulations were conducted in OptiSystem and MATLAB, followed by experimental validation using the IMC-1550-20-PMMZM device.

Active Quenching Circuit for Avalanche Photo-Diode in QKD Experiments

Physical Research Laboratory, Ahmedabad

Developed a high-frequency active quenching circuit for avalanche photodiodes (APDs) to increase key rates in QKD systems. The design enables single-photon detection at 100 MHz by employing high-voltage, high-speed GaN transistors while carefully mitigating parasitic effects. Optimization efforts focused on improving timing precision and detection accuracy at high speeds.

Receive Active Beamforming RFIC at Ka & Q-band for LEO Communication Satellite

Space Applications Center (ISRO), Ahmedabad

Contributed to a technology demonstration project for the development of an 8-channel RFIC integrating LNAs, digital phase shifters, and digital attenuators. The chip, fabricated using TowerJazz’s SBC13s4 130 nm process, was designed to be radiation-hardened and fault-tolerant, supporting Ka/Q-band frequencies for beamforming applications.

Third Harmonic Feedback Enabled T/R Module for Far-Field Wireless Power Transfer

IIST, Thiruvananthapuram

Designed a feedback-enabled transmit/receive (T/R) module for 2.45 GHz wireless power transmission, incorporating a 7.35 GHz third-harmonic feedback path for beam alignment and tracking. Performed system-level simulations in SystemVue and completed full T/R module design in Keysight ADS. The architecture enhances alignment efficiency and supports operation in mobile and multi-receiver environments.

Dual-Band Shared Aperture Antenna (SAA) Array

IIST, Thiruvananthapuram

Developed a compact dual-band antenna radiating at 2.45 GHz and 7.35 GHz using a shared-aperture configuration. Designed in CST Microwave Studio, the antenna achieved high gain and low mutual coupling, making it suitable for integration into feedback-enabled wireless power transfer systems.

Publications