4 November 2004 Comparison of semiconductor microcavity with ring and disk resonators
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In recently years, high-index-contrast semiconductor ring and disk resonators have attracted much attention. Nanofabrication techniques now allow the realization of semiconductor microcavity ring and disk resonators with evanescent wave coupling to submicron-width waveguides across submicron-width air gaps. In this paper, we use the finite-difference time-domain (FDTD) method to simulate the coupling efficiencies and resonant frequencies for optical microcavity ring and disk resonators devices. Studies of the transmission characteristics illustrate the transition from single-mode resonances to whispering-gallery-mode resonances as the waveguide width of the micro-ring approaching to a fulfilled micro-disk.
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Shyh-Lin Tsao, Ming-Yi Chang, "Comparison of semiconductor microcavity with ring and disk resonators", Proc. SPIE 5556, Photonic Devices and Algorithms for Computing VI, (4 November 2004); doi: 10.1117/12.559443; https://doi.org/10.1117/12.559443

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