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Extraction of the β-factor for single quantum dots coupled to a photonic crystal waveguide

Extraction of the β-factor for single quantum dots coupled to a photonic crystal waveguide
Extraction of the β-factor for single quantum dots coupled to a photonic crystal waveguide
We present measurements of the β-factor, describing the coupling efficiency of light emitted by single InAs/GaAs semiconductor quantum dots into a photonic crystal waveguide mode. The β-factor is evaluated by means of time-resolved frequency-dependent photoluminescence spectroscopy. The emission wavelength of single quantum dots is temperature tuned across the band edge of a photonic crystal waveguide and the spontaneous emission rate is recorded. Decay rates up to 5.7ns-1, corresponding to a Purcell factor of 5.2, are measured and β-factors up to 85% are extracted. These results prove the potential of photonic crystal waveguides in the realization of on-chip single-photon sources.
0003-6951
1106-1108
Thyrrestrup, Henri
fefa8c20-0543-4960-b1c4-d12849c85019
Sapienza, Luca
a2e0cf6c-1f22-4a5a-87a2-ffab0e24e6ac
Lodahl, Peter
773be58a-20ea-4927-b32a-d06b5b541c20
Thyrrestrup, Henri
fefa8c20-0543-4960-b1c4-d12849c85019
Sapienza, Luca
a2e0cf6c-1f22-4a5a-87a2-ffab0e24e6ac
Lodahl, Peter
773be58a-20ea-4927-b32a-d06b5b541c20

Thyrrestrup, Henri, Sapienza, Luca and Lodahl, Peter (2010) Extraction of the β-factor for single quantum dots coupled to a photonic crystal waveguide. Applied Physics Letters, 96 (23), 1106-1108. (doi:10.1063/1.3446873).

Record type: Article

Abstract

We present measurements of the β-factor, describing the coupling efficiency of light emitted by single InAs/GaAs semiconductor quantum dots into a photonic crystal waveguide mode. The β-factor is evaluated by means of time-resolved frequency-dependent photoluminescence spectroscopy. The emission wavelength of single quantum dots is temperature tuned across the band edge of a photonic crystal waveguide and the spontaneous emission rate is recorded. Decay rates up to 5.7ns-1, corresponding to a Purcell factor of 5.2, are measured and β-factors up to 85% are extracted. These results prove the potential of photonic crystal waveguides in the realization of on-chip single-photon sources.

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Published date: 8 June 2010
Organisations: Quantum, Light & Matter Group

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Local EPrints ID: 358598
URI: http://eprints.soton.ac.uk/id/eprint/358598
ISSN: 0003-6951
PURE UUID: 5fbcc504-8494-44be-b603-b44eabdff75b

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Date deposited: 11 Oct 2013 13:24
Last modified: 11 Nov 2019 20:54

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