Gain-assisted critical coupling for high-performance coherent perfect absorbers

Title
Gain-assisted critical coupling for high-performance coherent perfect absorbers
Author
송석호
Keywords
ABSORPTION
Issue Date
2015-05
Publisher
OPTICAL SOC AMER
Citation
OPTICS LETTERS, v. 40, NO 10, Page. 2309-2312
Abstract
Balanced radiation and absorption rates of an optical resonator are necessary for coherent perfect light absorption in many active device applications. This balance is referred to as critical coupling condition. We propose a gain-assisted method for exact access to critical coupling conditions without altering any structure parameters. In a coherent absorber with additional internal gain media, critical coupling with arbitrarily high coherent signal extinction can be obtained by continuously tuning optical pumping density. Assuming a surface-plasmon resonance grating covered by a gain layer as a promising architecture, we numerically demonstrate gain-assisted continuous access to its critical coupling point with experimentally probable settings. In addition, the gain tuning further introduces switching of the coherent-absorber's functionality to a conventional lossless beam splitter. (C) 2015 Optical Society of America
URI
https://www.osapublishing.org/ol/abstract.cfm?uri=ol-40-10-2309http://hdl.handle.net/20.500.11754/24672
ISSN
0146-9592; 1539-4794
DOI
10.1364/OL.40.002309
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE