Controlling the spontaneous emission rate of single quantum dots in a two-dimensional photonic crystal
sunlihui01 添加于 2009-11-16 20:40
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作 者
Englund D, Fattal D, Waks E, Solomon G, Zhang B, Nakaoka T, Arakawa Y, Yamamoto Y, Vuckovic J 摘 要
We observe large spontaneous emission rate modification of individual InAs quantum dots (QDs) in a 2D photonic crystal with a modified, high-Q single-defect cavity. Compared to QDs in a bulk semiconductor, QDs that are resonant with the cavity show an emission rate increase of up to a factor of 8. In contrast, off-resonant QDs indicate up to fivefold rate quenching as the local density of optical states is diminished in the photonic crystal. In both cases, we demonstrate photon antibunching, showing that the structure represents an on-demand single photon source with a pulse duration from 210 ps to 8 ns. We explain the suppression of QD emission rate using finite difference time domain simulations and find good agreement with experiment.-
详细资料
- 关键词: MICROCAVITY
- 文献种类:期刊
- 期刊名称: PHYSICAL REVIEW LETTERS
- 期卷页: 2005年 第95卷 第1期
- 出版社: AMERICAN PHYSICAL SOC, ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
- 地址: 1. Stanford Univ, Ginzton Lab, Stanford, CA 94305 USA2. Stanford Univ, Solid State Photon Lab, Stanford, CA 94305 USA3. Univ Tokyo, Inst Ind Sci, Tokyo, Japan
- ISBN: 0031-9007
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