Weak coupling interactions of colloidal lead sulphide nanocrystals with silicon photonic crystal nanocavities near 1.55 μm at room temperature

被引：49

作者：

Bose, Ranojoy ^{[1
]}

Yang, Xiaodong ^{[1
]}

Chatterjee, Rohit ^{[1
]}

Gao, Jie ^{[1
]}

Wong, Chee Wei ^{[1
]}

机构：

[1] Columbia Univ, Opt Nanostruct Lab, New York, NY 10027 USA

来源：

APPLIED PHYSICS LETTERS | 2007年 / 90卷 / 11期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.2714097

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The authors observe the weak coupling of lead sulphide nanocrystals to localized defect modes of two-dimensional silicon nanocavities. Cavity resonances characterized with ensemble nanocrystals are verified with cold-cavity measurements using integrated waveguides. Polarization dependence of the cavity field modes is observed. The linewidths measured in coupling experiments are broadened in comparison to the cold-cavity characterization, partly due to large homogeneous linewidths of the nanocrystals. The calculated Purcell factor [Phys. Rev. 69, 681 (1946)] for a single exciton is 100, showing promise toward applications in single photon systems. These novel light sources operate near 1.55 mu m wavelengths at room temperature, permitting integration with current fiber communication networks. (c) 2007 American Institute of Physics.

引用

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