Date of Degree

6-2022

Document Type

Dissertation

Degree Name

Ph.D.

Program

Physics

Advisor

Li Ge

Committee Members

Mark Feuer

Azriel Genack

Vinod Menon

Mohammad Ali-Miri

Liang Feng

Vadim Oganesyan

Subject Categories

Atomic, Molecular and Optical Physics | Optics

Keywords

non-Hermitian physics, non-Hermitian photonics, laser physics

Abstract

We approach some fundamental aspects of photonic dissipative systems treated by a non-Hermitian theory. Inspired by the possibilities provided by some major non-Hermitian symmetries, we study systematically the properties of the novel pseudochirality, pseudo-anti-Hermiticity, and supersymmetry. We analyze other aspect of photonics, the zero mode, which has a profound connection to non-Hermitian physics. We propose a scheme to realize a zero mode that exists even in the absence of symmetries. Finally, we approach light transport in non-Hermitian photonic systems, where the introduction of gain and loss can modify drastically the propagation speed of wavepackets.

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