Design and Analysis of a Single Photon Source: Semiconductor Quantum Dot Enclosed in Photonic Crystal Microcavity (PhD Viva Voce)

Abstract: High-quality single-photon sources are essential for quantum information processing and quantum key distribution. A semiconductor quantum dot embedded in a photonic crystal microcavity is designed and optimized to generate highly coherent and indistinguishable single photons suitable for quantum communication. The quantum dot geometry is optimized through finite element analysis, while an efficient hybrid computational approach is developed for the design and analysis of the photonic crystal microcavity, significantly reducing computational complexity without compromising accuracy. Photon generation is further enhanced by incorporating Stimulated Raman Adiabatic Passage (STIRAP), enabling efficient population transfer, reduced decoherence, and selective excitation of long-lived quantum states to improve photon coherence and indistinguishability. Two complementary performance evaluation methods are developed: an exact Lindbladian framework for rigorous analysis and a computationally efficient approximate model for rapid evaluation of key performance metrics. Finally, Monte Carlo simulations are employed to investigate the influence of fabrication-induced dimensional variations, demonstrating the robustness of the proposed design and its potential for practical quantum communication applications.

Event Details
Title: Design and Analysis of a Single Photon Source: Semiconductor Quantum Dot Enclosed in Photonic Crystal Microcavity (PhD Viva Voce)
Date: July 09, 2026 at 08:00 AM
Venue: Google Meet (https://meet.google.com/kmy-chhv-wus)
Speaker: Mr. Jyothish M (EE15D010)
Guide: Dr. Manivasakan R
Type: PHD seminar