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

Wen Hao Chang, Wen Yen Chen, Hsiang Szu Chang, Tung Po Hsieh, Jen Inn Chyi, Tzu Min Hsu

Research output: Contribution to journalArticlepeer-review

242 Scopus citations

Abstract

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 β=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.

Original languageEnglish
Article number117401
JournalPhysical Review Letters
Volume96
Issue number11
DOIs
StatePublished - 2006

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