Microcavity confinement based on an anomalous zero group-velocity waveguide mode
Microcavity confinement based on an anomalous zero group-velocity waveguide mode
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DOI：
10.1364/ol.30.000552
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发表时间：
2005-03-01
期刊：
影响因子：
3.6
通讯作者：
Joannopoulos, JD
中科院分区：
文献类型：
--
作者：
Ibanescu, M;Johnson, SG;Joannopoulos, JD
我们提出并证明了一种基于非零波矢处群速度为零的反常均匀波导模的小模体积高Q腔的形成机制。在具有特殊设计的横截面的一小段均匀波导中，光被小群速度传播纵向限制，横向被反射包层限制。对于间隔大约pi/k(0)的一组空腔长度，品质因数Q被小群速度大大提高，其中k(0)是群速度为零的纵波矢量。(C)2005年美国光学学会。
We propose and demonstrate a mechanism for small-modal-volume high-Q cavities based on an anomalous uniform waveguide mode that has zero group velocity at a nonzero wave vector. In a short piece of a uniform waveguide with a specially designed cross section, light is confined longitudinally by small group-velocity propagation and transversely by a reflective cladding. The quality factor Q is greatly enhanced by the small group velocity for a set of cavity lengths that are separated by approximately pi/k(0), where k(0) is the longitudinal wave vector for which the group velocity is zero. (C) 2005 Optical Society of America.