Mode identification of high-quality-factor single-defect nanocavities in quantum dot-embedded photonic crystals

被引：45

作者：

Shirane, Masayuki

Kono, Shunsuke

Ushida, Jun

Ohkouchi, Shunsuke

Ikeda, Naoki

Sugimoto, Yoshimasa

Tomita, Akihisa

机构：

[1] NEC Corp Ltd, Fundamental & Environm Res Labs, Tsukuba, Ibaraki 3058501, Japan

[2] Natl Inst Adv Ind Sci & Technol, Ultrafast Photon Devices Lab, Tsukuba, Ibaraki 3058568, Japan

[3] Univ Tsukuba, Ctr Tsukuba Adv Res Alliance, Tsukuba, Ibaraki 3058577, Japan

[4] SORST, Japan Sci & Technol Agcy, Tsukuba, Ibaraki 3058501, Japan

来源：

JOURNAL OF APPLIED PHYSICS | 2007年 / 101卷 / 07期

关键词：

D O I：

10.1063/1.2714644

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We investigate the quality (Q) factor and the mode dispersion of single-defect nanocavities based on a triangular-lattice GaAs photonic-crystal (PC) membrane, which contain InAs quantum dots (QDs) as a broadband emitter. To obtain a high Q factor for the dipole mode, we modulate the radii and positions of the air holes surrounding the nanocavity while keeping sixfold symmetry. A maximum Q of 17 000 is experimentally demonstrated with a mode volume of V=0.39(lambda/n)(3). We obtain a Q/V of 44 000(n/lambda)(3), one of the highest values ever reported with QD-embedded PC nanocavities. We also observe ten cavity modes within the first photonic band gap for the modulated structure. Their dispersion and polarization properties agree well with the numerical results. (c) 2007 American Institute of Physics.

引用

页数：7

共 20 条

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