Controlling directional absorption with chiral exceptional surfaces.
Document Type
Article
Publication Date
11-1-2019
Department
Department of Physics
Abstract
Significant efforts have been dedicated to engineering optical systems with predefined, excitation-dependent light absorption. An important concept along this line is that of exceptional points which allow for engineering directional light absorbing schemes. Current systems, however, do not lend themselves to easy design criterion or robust experimental realization. Here we demonstrate that an optical microring resonator coupled to a waveguide terminated with a mirror supports a chiral exceptional surface that can be used as a platform for tailoring directional light absorption in a straightforward fashion. We further demonstrate that this configuration can be used to implement a unidirectional coherent perfect absorber with controllable differential loss by tuning only a single parameter.
Publication Title
Optics letters
Recommended Citation
Zhong, Q.,
Nelson, S.,
Özdemir, Ş.,
&
El-Ganainy, R.
(2019).
Controlling directional absorption with chiral exceptional surfaces..
Optics letters,
44(21), 5242-5245.
http://doi.org/10.1364/OL.44.005242
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/1255