Comparison of multi-cavity arrays for on-chip WDM applications

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Thesis Type: Postgraduate

Institution Of The Thesis: Middle East Technical University, Graduate School of Natural and Applied Sciences, Turkey

Approval Date: 2019

Thesis Language: English

Student: HAVVA ERDİNÇ

Supervisor: Serdar Kocaman

Abstract:

Researches about the interaction of single atoms with electromagnetic field create the foundation of cavity quantum electrodynamics (CQED) technology. Microlasers, photon bandgap structures and quantum dot structures in cavities are the initial examples of Cavity Quantum Electrodynamics. This thesis is focused on the comparison of multi-cavity arrays for on-chip wavelength division multiplexing (WDM) applications in the weak coupling regime. Firstly, single QD embedded cavity (cavity QD EIT) and cavity-cavity array (classical EIT) systems are compared in the weak coupling regime in terms of transmission, group delay, quality factor, and full width half maximum (FWHM) characteristics. Identical transmission characteristic is observed for both systems whereas group delay values of classical EIT is two times higher than the cavity-QD EIT surprisingly. Then, single QD embedded cavity-cavity array and triple cavity array systems are compared in the weak coupling regime. These structures are simulated with several different variables many times and results are compared with the calculations for both systems. Results show that it is possible to get different WDM characteristic with different configurations. Taking advantage of the unique capabilities of quantum technologies, on-chip WDM applications can create new opportunities for the latest developments in designing communication infrastructure.