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Open AccessArticle

Modeling of On-Chip Optical Nonreciprocity with an Active Microcavity

1
Department of Applied Physics, Yale University, New Haven, CT 06511, USA
2
National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, and School of Physics, Nanjing University, Nanjing 219003, China
3
Department of Physics, University of Arkansas, Fayetteville, AR 72701, USA
*
Author to whom correspondence should be addressed.
Photonics 2015, 2(2), 498-508; https://doi.org/10.3390/photonics2020498
Received: 14 April 2015 / Accepted: 5 May 2015 / Published: 13 May 2015
(This article belongs to the Special Issue New Frontiers in Plasmonics and Metamaterials)
On-chip nonreciprocal light transport holds a great impact on optical information processing and communications based upon integrated photonic devices. By harvesting gain-saturation nonlinearity, we recently demonstrated on-chip optical asymmetric transmission at telecommunication bands with superior nonreciprocal performances using only one active whispering-gallery-mode microtoroid resonator, beyond the commonly adopted magneto-optical (Faraday) effect. Here, detailed theoretical analysis is presented with respect to the reported scheme. Despite the fact that our model is simply the standard coupled-mode theory, it agrees well with the experiment and describes the essential one-way light transport in this nonreciprocal device. Further discussions, including the connection with the second law of thermodynamics and Fano resonance, are also briefly made in the end. View Full-Text
Keywords: on-chip optical asymmetric transmission; gain-saturation nonlinearity; active WGM microtoroid cavity; figures of merit; second law of thermodynamics; Fano interference on-chip optical asymmetric transmission; gain-saturation nonlinearity; active WGM microtoroid cavity; figures of merit; second law of thermodynamics; Fano interference
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Wen, J.; Jiang, X.; Zhang, M.; Jiang, L.; Hua, S.; Wu, H.; Yang, C.; Xiao, M. Modeling of On-Chip Optical Nonreciprocity with an Active Microcavity. Photonics 2015, 2, 498-508.

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