Ultrahigh-Q nanocavities in two-dimensional photonic crystal slabs

被引：104

作者：

Asano, Takashi ^{[1
]}

Song, Bong-Shik ^{[1
]}

Akahane, Yoshihiro ^{[1
]}

Noda, Susumu ^{[1
]}

机构：

[1] Kyoto Univ, Dept Elect Sci & Engn, Kyoto 6158510, Japan

来源：

IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS | 2006年 / 12卷 / 06期

基金：

日本科学技术振兴机构;

关键词：

heterostructure; photonic crystal slab; radiation loss; ultrasmall optical cavity;

D O I：

10.1109/JSTQE.2006.881639

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this paper, we discuss methods to suppress the radiation loss of ultrasmall cavities, of the size of the optical wavelength, in two-dimensional photonic crystal slabs. An important design concept to suppress radiation loss is introduced: The envelope of the cavity mode field should have no abrupt changes and should ideally follow a Gaussian function. Cubic wavelength order cavities, With experimental Q factors of 100 000 and nearly 1 000 000 are obtained by tailoring the envelope functions using air-hole shifts and multistep heterostructures, respectively. In addition, the experimental Q factors of the latest cavities are shown to be determined by the imperfections in the fabricated structures and not by the cavity design. The differences between the experimental and the theoretical Q factors are investigated in order to demonstrate how higher Q factors could be realized in the future.

引用

页码：1123 / 1134

页数：12

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