Coupling of whispering-gallery modes in size-mismatched microdisk photonic molecules

Details Coupling of whispering-gallery modes in size-mismatched microdisk photonic molecules Coupling of whispering-gallery modes in size-mismatched microdisk photonic molecules

2007-04-06

arxiv.org/abs/0704.0820v1

Opt. Lett. 32(11) 1557-1559 (2007)

Physics

Optics

3 pages with 5 figures (to appear in Opt. Lett. 2007)

Scientific paper

10.1364/OL.32.001557

Mechanisms of whispering-gallery (WG) modes coupling in microdisk photonic molecules (PMs) with slight and significant size mismatch are numerically investigated. The results reveal two different scenarios of modes interaction depending on the degree of this mismatch and offer new insight into how PM parameters can be tuned to control and modify WG-modes wavelengths and Q-factors. From a practical point of view, these findings offer a way to fabricate PM microlaser structures that exhibit low thresholds and directional emission, and at the same time are more tolerant to fabrication errors than previously explored coupled-cavity structures composed of identical microresonators.

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