Parity-time-symmetry breaking in double-slab surface-plasmon-polariton waveguides

Title
Parity-time-symmetry breaking in double-slab surface-plasmon-polariton waveguides
Authors
조진호
Keywords
NON-HERMITIAN HAMILTONIANS
Issue Date
2015-04
Publisher
OPTICAL SOC AMER
Citation
OPTICS EXPRESS, v. 23, NO 9, Page. 11783-11789
Abstract
We theoretically demonstrate spontaneous PT-symmetry breaking behavior of surface-plasmon polaritons (SPP) in coupled double-slab (DS) waveguides. By virtue of a flat-top field at critical wavelength, the imaginary index of a DS-SPP mode can be controlled via changing the core thickness, while the real index is kept constant. Therefore, a waveguide coupler that consists of a pair of DS-SPP waveguides with different core thicknesses can represent a passive PT-symmetric system, which always maintains symmetry under a real potential. This set-up also represents a good opportunity to investigate the underlying physics of PT-symmetry breaking in non-Hermitian Hamiltonian systems. (C) 2015 Optical Society of America
URI
https://www.osapublishing.org/oe/abstract.cfm?uri=oe-23-9-11783http://hdl.handle.net/20.500.11754/23725
ISSN
1094-4087
DOI
http://dx.doi.org/10.1364/OE.23.011783
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ETC > 연구정보
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