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Title: Diffraction-free beam propagation at the exceptional point of non-Hermitian Glauber Fock lattices
Abstract

We construct localized beams in a non-Hermitian Glauber Fock (NGF) lattice of coupled waveguides and show that they can propagate over a long distance withalmost no diffraction. We specifically obtain the diffraction-free beams in a finite NGF lattice at the exceptional point (EP) by using the exact eigenstates of the semi-infinite unidirectional NGF lattice. We provide a numerical approach to finding other lattices that are capable of supporting non-diffracting beams at EPs.

 
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Award ID(s):
2012172
NSF-PAR ID:
10478981
Author(s) / Creator(s):
;
Publisher / Repository:
IOP Science
Date Published:
Journal Name:
Journal of Optics
Volume:
24
Issue:
11
ISSN:
2040-8978
Page Range / eLocation ID:
11LT01
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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