Spontaneous two-photon emission from a single quantum dot

Yasutomo Ota, Satoshi Iwamoto, Naoto Kumagai, Yasuhiko Arakawa

Research output: Contribution to journalArticlepeer-review

128 Citations (Scopus)


Spontaneous two-photon emission from a solid-state single quantum emitter is observed. We investigated photoluminescence from the neutral biexciton in a single semiconductor quantum dot coupled with a high Q photonic crystal nanocavity. When the cavity is resonant to the half energy of the biexciton, the strong vacuum field in the cavity inspires the biexciton to simultaneously emit two photons into the mode, resulting in clear emission enhancement of the mode. Meanwhile, the suppression of other single photon emission from the biexciton was observed, as the two-photon emission process becomes faster than the others at the resonance.

Original languageEnglish
Article number233602
JournalPhysical review letters
Issue number23
Publication statusPublished - 2011 Nov 30
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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