Light scattering and Fano resonances in high-Q photonic crystal nanocavities

被引：244

作者：

Galli, M. ^{[1
,2
]}

Portalupi, S. L. ^{[1
,2
]}

Belotti, M. ^{[1
,2
]}

Andreani, L. C. ^{[1
,2
]}

O'Faolain, L. ^{[3
]}

Krauss, T. F. ^{[3
]}

机构：

[1] Univ Pavia, Dipartimento Fis A Volta, I-27100 Pavia, Italy

[2] Univ Pavia, UdR CNISM, I-27100 Pavia, Italy

[3] Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 07期

关键词：

light scattering; photonic crystals; Q-factor; quantum interference phenomena; WAVE-GUIDES; PROPAGATION;

D O I：

10.1063/1.3080683

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The authors show that light scattering from high-Q planar photonic crystal nanocavities can display Fano-like resonances corresponding to the excitation of localized cavity modes. By changing the scattering conditions, we are able to tune the observed lineshapes from strongly asymmetric and dispersivelike resonances to symmetric Lorentzians. Results are interpreted according to the Fano model of quantum interference between two coupled scattering channels. Combined measurements and line shape analysis on a series of silicon L3 nanocavities as a function of nearby hole displacement demonstrate that Q factors as high as 1.1x10(5) can be directly measured in these structures. Furthermore, a comparison with theoretically calculated Q factors allows to extract the rms deviation of hole radii due to weak disorder of the photonic lattice.

引用

页数：3

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