arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1407.4672physics.opticsquant-ph
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$\mathcal{PT}$ -对称微粒laser -吸收剂

$\mathcal{PT}$-symmetric microring laser-absorber

Stefano Longhi, Liang Feng

摘要:

本文从理论上研究了具有混合折射率和增益光栅的$\mathcal{PT}$对称微环与主波导外耦合的激射和相干完全吸收特性。对于位于$\mathcal{PT}$对称破缺点的复合光栅,可以实现理想的单向(顺时针或逆时针)激光发射,但光栅不能区分纵模,不能同时实现CPA。在光栅$\mathcal{PT}$对称性破缺点以上,可以获得单模发射和同时CPA,环中顺时针和逆时针模的激发是不平衡的和可控的。

英文摘要:

The lasing and coherent perfect absorption (CPA) properties of $\mathcal{PT}$-symmetric microrings with mixed index and gain gratings, externally coupled to a bus waveguide, are theoretically investigated. For a complex grating at the $\mathcal{PT}$ symmetry breaking point, perfect unidirectional (either clockwise or counterclockwise) laser emission can be realized, however the grating does not discriminate longitudinal modes and CPA can not be simultaneously achieved. Above the grating $\mathcal{PT}$ symmetry breaking point, single mode emission and simultaneous CPA can be obtained, with unbalanced and controllable excitation of clockwise and counterclockwise modes in the ring.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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