skip to main content

DOE PAGESDOE PAGES

Title: Directional excitation without breaking reciprocity

Here, we propose a mechanism for directional excitation without breaking reciprocity. This is achieved by embedding an impedance matched parity-time symmetric potential in a three-port system. The amplitude distribution within the gain and loss regions is strongly influenced by the direction of the incoming field. Consequently, the excitation of the third port is contingent on the direction of incidence while transmission in the main channel is immune. This design improves the four-port directional coupler scheme, as there is no need to implement an anechoic termination to one of the ports.
Authors:
 [1] ;  [2] ;  [2] ;  [3] ;  [4]
  1. Univ. of California, Berkeley, CA (United States). NSF Nanoscale Science and Engineering Center; Univ. of Texas Rio Grande Valley, Brownsville, TX (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Univ. of California, Berkeley, CA (United States). NSF Nanoscale Science and Engineering Center
  3. Univ. of California, Berkeley, CA (United States). Dept. of Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  4. Univ. of California, Berkeley, CA (United States). NSF Nanoscale Science and Engineering Center; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Grant/Contract Number:
AC02-05CH11231
Type:
Accepted Manuscript
Journal Name:
New Journal of Physics
Additional Journal Information:
Journal Volume: 18; Journal Issue: 9; Journal ID: ISSN 1367-2630
Publisher:
IOP Publishing
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; pt symmetry; acoustics; directional excitation
OSTI Identifier:
1414764