Unidirectional reflectionless phenomenon in ultracompact non-Hermitian plasmonic waveguide system based on phase coupling
- Title
- Unidirectional reflectionless phenomenon in ultracompact non-Hermitian plasmonic waveguide system based on phase coupling
- Author
- 이영백
- Keywords
- plasmonic waveguides; unidirectional reflectionlessness; exception point
- Issue Date
- 2017-11
- Publisher
- IOP PUBLISHING LTD
- Citation
- JOURNAL OF OPTICS, v. 19, no. 12, Article no. 125005
- Abstract
- Unidirectional reflectionless phenomenon is theoretically investigated based on phase coupling in an ultracompact non-Hermitian plasmonic waveguide system, which consists of two metal-insulator-metal (MIM) stub resonators side coupled to a MIM plasmonic waveguide. By appropriately tuning the phase difference between two stub resonators, the reflectivity for forward direction reaches to 0.91 and backward direction is close to 0 at the exception point (EP), while the backward absorption reaches to 0.98 and the forward absorption is close to 0.05. Hence, the unidirectional coherent perfect absorption (CPA) is realized at the vicinity of EP. This work will provide potential applications in the filter, sensor, plasmonic diode-like device, and so on.
- URI
- https://iopscience.iop.org/article/10.1088/2040-8986/aa9532https://repository.hanyang.ac.kr/handle/20.500.11754/116137
- ISSN
- 2040-8978; 2040-8986
- DOI
- 10.1088/2040-8986/aa9532
- Appears in Collections:
- COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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