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Cylindrical Resonator Utilizing a Curved Resonant Grating as a Cavity Wall
Graduate School of Engineering, Tohoku University, Aramaki-Aza-Aoba 6-6, Aoba-ku, Sendai, Miyagi 980-8579, Japan
* Author to whom correspondence should be addressed.
Received: 26 December 2011; in revised form: 15 February 2012 / Accepted: 17 February 2012 / Published: 27 February 2012
Abstract: A thin-film grating on a curved substrate functions as a highly reflective and wavelength sensitive mirror for a diverging wave that has the same curvature as the substrate. In this paper we propose a cylindrical cavity surrounded by a curved resonant grating wall, and describe its resonance characteristics. Through finite-difference time-domain (FDTD) simulation we have clarified that this type of cavity supports two resonance modes: one is confined by Fresnel reflection and the other by resonance reflection of the wall. We have also demonstrated that the latter mode exhibits a Q factor several orders of magnitude higher than that of the former mode.
Keywords: resonant grating; guided-mode resonance; cylindrical cavity; circular cavity
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MDPI and ACS Style
Ohtera, Y.; Iijima, S.; Yamada, H. Cylindrical Resonator Utilizing a Curved Resonant Grating as a Cavity Wall. Micromachines 2012, 3, 101-113.
Ohtera Y, Iijima S, Yamada H. Cylindrical Resonator Utilizing a Curved Resonant Grating as a Cavity Wall. Micromachines. 2012; 3(1):101-113.
Ohtera, Yasuo; Iijima, Shohei; Yamada, Hirohito. 2012. "Cylindrical Resonator Utilizing a Curved Resonant Grating as a Cavity Wall." Micromachines 3, no. 1: 101-113.