Broadband Purcell enhanced emission dynamics of quantum dots in linear photonic crystal waveguides

被引：21
|
作者：
Laucht, A. [1 ,2 ,3 ]
Guenthner, T. [1 ,2 ,4 ]
Puetz, S. [1 ,2 ]
Saive, R. [1 ,2 ]
Frederick, S. [1 ,2 ,5 ]
Hauke, N. [1 ,2 ]
Bichler, M. [1 ,2 ]
Amann, M. -C. [1 ,2 ]
Holleitner, A. W. [1 ,2 ]
Kaniber, M. [1 ,2 ]
Finley, J. J. [1 ,2 ]
机构：
[1] Tech Univ Munich, Walter Schottky Inst, D-85748 Garching, Germany
[2] Tech Univ Munich, Dept Phys, D-85748 Garching, Germany
[3] Univ New S Wales, Ctr Quantum Computat & Commun Technol, Sydney, NSW 2052, Australia
[4] Univ Innsbruck, Inst Expt Phys, A-6020 Innsbruck, Austria
[5] Natl Res Council Canada, Ottawa, ON K1A 0R6, Canada
来源：
JOURNAL OF APPLIED PHYSICS | 2012年 / 112卷 / 09期
基金：
欧盟第七框架计划;
关键词：
CAVITY; DEVICE; OPTICS;
D O I：
10.1063/1.4764923
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The authors investigate the spontaneous emission dynamics of self-assembled InGaAs quantum dots embedded in GaAs photonic crystal waveguides. For an ensemble of dots coupled to guided modes in the waveguide, we report spatially, spectrally, and time-resolved photoluminescence measurements, detecting normal to the plane of the photonic crystal. For quantum dots emitting in resonance with the waveguide mode, an similar to 21x enhancement of photoluminescence intensity is observed as compared to dots in the unprocessed region of the wafer. This enhancement can be traced back to the Purcell enhanced emission of quantum dots into leaky and guided modes of the waveguide with moderate Purcell factors up to similar to 4x. Emission into guided modes is shown to be efficiently scattered out of the waveguide within a few microns, contributing to the out-of-plane emission and allowing the use of photonic crystal waveguides as broadband, efficiency-enhancing structures for surface-emitting diodes or single photon sources. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4764923]
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页数：6
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