Rotation-induced Mode Coupling in Open Wavelength-scale Microcavities
Abstract
We study the interplay between rotation and openness for mode coupling in wavelength-scale microcavities. In cavities deformed from a circular disk, the decay rates of a quasi-degenerate pair of resonances may cross or anti-cross with increasing rotation speed. The standing-wave resonances evolve to traveling-wave resonances at high rotation speed, however, both the clockwise (CW) and counter-clockwise (CCW) traveling-wave resonances can have a lower cavity decay rate, in contrary to the intuitive expectation from rotation-dependent effective index. With increasing rotation speed, a phase locking between the CW and CCW wave components in a resonance takes place. These phenomena result from the rotation-induced mode coupling, which is strongly influenced by the openness of the microcavity. The possibility of a non-monotonic Sagnac effect is also discussed.
Cite
@article{arxiv.1405.0468,
title = {Rotation-induced Mode Coupling in Open Wavelength-scale Microcavities},
author = {Li Ge and Raktim Sarma and Hui Cao},
journal= {arXiv preprint arXiv:1405.0468},
year = {2015}
}
Comments
8 pages, 6 figures