High-rate entanglement source via two-photon emission from semiconductor quantum wells

Alex Hayat, Pavel Ginzburg, Meir Orenstein

Research output: Contribution to journalArticlepeer-review

Abstract

We propose a compact high-intensity room-temperature source of entangled photons based on the efficient second-order process of two-photon spontaneous emission from electrically pumped semiconductor quantum wells in a photonic microcavity. Two-photon emission rate in room-temperature semiconductor devices is determined solely by the carrier density, regardless of the residual one-photon emission. The microcavity selects two-photon emission for a specific signal and idler wavelengths and at a preferred direction without modifying the overall rate. Pair-generation rate in GaAs AlGaAs quantum well structure is estimated using a 14-band model to be 3 orders of magnitude higher than for traditional broadband parametric down-conversion sources.

Original languageEnglish
Article number035339
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume76
Issue number3
DOIs
StatePublished - 30 Jul 2007
Externally publishedYes

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