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Parity-time-symmetry breaking in double-slab surface-plasmon-polariton waveguides
- Authors
- Choi, Youngsun; Hong, Jong-Kyun; Cho, Jin-Ho; Lee, Kwang-Geol; Yoon, Jae Woong; Song, Seok Ho
- Issue Date
- May-2015
- Publisher
- Optical Society of America
- Citation
- Optics Express, v.23, no.9, pp 11783 - 11789
- Pages
- 7
- Indexed
- SCI
SCIE
SCOPUS
- Journal Title
- Optics Express
- Volume
- 23
- Number
- 9
- Start Page
- 11783
- End Page
- 11789
- ISSN
- 1094-4087
- 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
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Related Researcher
- Lee, Kwang Geol
- COLLEGE OF NATURAL SCIENCES (DEPARTMENT OF PHYSICS)