Design of a high-Q air-slot cavity based on a width-modulated line-defect in a photonic crystal slab

被引：88

作者：

Yamamoto, Takayuki ^{[1
,2
,3
]}

Notomi, Masaya ^{[2
,3
]}

Taniyama, Hideaki ^{[2
,3
]}

Kuramochi, Eiichi ^{[2
,3
]}

Yoshikawa, Yutaka ^{[1
,3
]}

Torii, Yoshio ^{[1
,3
]}

Kuga, Takahiro ^{[1
,3
]}

机构：

[1] Univ Tokyo, Inst Phys, Meguro Ku, Tokyo 1538902, Japan

[2] NTT Corp, NTT Basic Res Labs, Atsugi, Kanagawa 2430198, Japan

[3] Japan Sci & Technol Agcy, CREST, PRESTO, Saitama, Japan

来源：

OPTICS EXPRESS | 2008年 / 16卷 / 18期

关键词：

D O I：

10.1364/OE.16.013809

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We have presented a novel design of a photonic crystal slab (PCS) nanocavity, in which the electric field of the cavity mode is strongly localized in free space. The feature of the cavity is a linear air slot introduced to the center of the mode-gap confined PCS cavity. Owing to the discontinuity of the dielectric constant, the electric field of the cavity mode is strongly enhanced inside the slot, allowing strong matter-field coupling and large interaction volume in free space. Using finite-difference time-domain method, we calculate the properties of the cavity mode as a function of the slot width. The calculated quality factor is still as high as 2 x 10(5) and the mode volume is as small as 0.14 of a cubic wavelength in a vacuum, even if 200-nm-wide slot is introduced to the PCS. (c) 2008 Optical Society of America.

引用

页码：13809 / 13817

页数：9

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