Salient role of the non-Hermitian coupling for optimizing conditions in multiple maximizations of inter-cavity light transfer

We reveal that non-Hermitian lossy couplings in an inter-cavity light transfer process are crucial for an optimum light transfer, unlike the prevailed belief. Our results turn out the fact that the light transfer can have multiple maxima following the increased inter-cavity distance. To validate thi...

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Bibliographic Details
Published in:Optics express 2021-06, Vol.29 (13), p.19998-20009
Main Authors: Yu, Hyeon-Hye, Gwak, Sunjae, Kim, Hyundong, Ryu, Jung-Wan, Kim, Chil-Min, Yi, Chang-Hwan
Format: Article
Language:English
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Summary:We reveal that non-Hermitian lossy couplings in an inter-cavity light transfer process are crucial for an optimum light transfer, unlike the prevailed belief. Our results turn out the fact that the light transfer can have multiple maxima following the increased inter-cavity distance. To validate this finding both in the weak and strong coupling regimes, we demonstrate our claim in the vicinity of the so-called exceptional point. We believe our results can contribute to realizing coupled-optical-cavity-based devices which is functional with an ultra-efficient light transfer, especially when the device scale is as small as the operation wavelength.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.430778