Efficient single-photon sources based on low-density quantum dots in photonic-crystal nanocavities

被引：253

作者：

Chang, WH

Chen, WY

Chang, HS

Hsieh, TP

Chyi, JI

Hsu, TM ^{[1
]}

机构：

[1] Natl Cent Univ, Dept Phys, Chungli 32054, Taiwan

[2] Natl Cent Univ, Dept Elect Engn, Chungli 32054, Taiwan

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.96.117401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

An efficient single-photon source based on low-density InGaAs quantum dots in a photonic-crystal nanocavity is demonstrated. The single-photon source features the effects of a photonic band gap, yielding a single-mode spontaneous emission coupling efficiency as high as beta=92% and a linear polarization degree up to p=95%. This appealing performance makes it well suited for practical implementation of polarization-encoded schemes in quantum cryptography.

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页数：4

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