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Mirror-Less Unidirectional Radiation in an Asymmetric Single Resonatoroa mark
  • Song, Joohyung ;
  • Heo, Hyungjun ;
  • Lee, Sangjun ;
  • Kim, Sangin
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Publication Year
2022-08-01
Journal
Journal of Lightwave Technology
Publisher
Institute of Electrical and Electronics Engineers Inc.
Citation
Journal of Lightwave Technology, Vol.40 No.15, pp.5163-5170
Keyword
Guided-mode resonancesurface emitting lasersunidirectional radiationzero-contrast gratings
Mesh Keyword
External mirrorsGuided-mode resonanceInternal reflectorsIntuitive operationsMutual couplingResonant modeSlabSurface-emitting laserUnidirectional radiationZero-contrast grating
All Science Classification Codes (ASJC)
Atomic and Molecular Physics, and Optics
Abstract
We propose a novel approach to realize unidirectional radiation in an asymmetric single resonator without using an external mirror, which is based on mutual coupling between two degenerate resonant modes through the background scattering of the asymmetric resonator. In the proposed approach, only one of the resonant modes experiences optical gain and the other works just as an internal reflector. So, our approach is conceptually to mimic a one-port system by introducing the internal reflector in a two-port system. Due to this intuitive and simple operation concept, the design of such devices is straightforward. We described the operation principle by using the temporal coupled-mode theory, from which a practical design method was derived. An example device of the proposed approach was designed based on guided-mode resonances in a slab waveguide grating and its performance was analyzed with the finite-difference time-domain simulation. A ratio of 4.6 x 104 between the upward and the downward radiations was numerically demonstrated.
ISSN
1558-2213
Language
eng
URI
https://aurora.ajou.ac.kr/handle/2018.oak/32680
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85129634841&origin=inward
DOI
https://doi.org/2-s2.0-85129634841
Journal URL
https://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=50
Type
Article
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