Bright Polarized Single-Photon Source Based on a Linear Dipole - Archive ouverte HAL Access content directly
Preprints, Working Papers, ... Year :

Bright Polarized Single-Photon Source Based on a Linear Dipole

, , , , , , , , , , , , , , , (1)
1
S. E. Thomas
M. Billard
  • Function : Author
N. Coste
  • Function : Author
S. C. Wein
Priya Priya
H. Ollivier
O. Krebs
L. Tazaïrt
  • Function : Author
A. Harouri
  • Function : Author
A. Lemaître
I. Sagnes
C. Anton
L. Lanco
N. Somaschi
  • Function : Author
J. C. Loredo

Abstract

Semiconductor quantum dots in cavities have emerged as high-performance single-photon sources for quantum technologies. However, they are still far from ideal deterministic operation, which simultaneously requires perfect linear polarization, population inversion and collection efficiency. Thus far, the best performing sources have used an unpolarized emitter together with polarized photon extraction. Here, we explore a new path to deterministic operation: exploiting the natural asymmetry of neutral quantum dots that present linearly-polarized dipoles and allow for the emission of fully polarized light. To benefit from such a property, we propose the use of off-resonant phonon-assisted excitation that has been theoretically predicted to enable near-unity population inversion and quantum purity. We experimentally study this approach for quantum dots in micropillar cavities and demonstrate single-photon emission with a degree of linear polarization up to 0.994 $\pm$ 0.007 and a high population inversion -- 85\% as high as resonant excitation. We demonstrate a single-photon source with a polarized first lens brightness of 0.51 $\pm $ 0.01, a single-photon purity of 0.939 $\pm$ 0.001 and single-photon indistinguishability of 0.915 $\pm$ 0.003.
Fichier principal
Vignette du fichier
2007.04330.pdf (1.03 Mo) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

hal-03059771 , version 1 (14-12-2020)

Identifiers

Cite

S. E. Thomas, M. Billard, N. Coste, S. C. Wein, Priya Priya, et al.. Bright Polarized Single-Photon Source Based on a Linear Dipole. 2020. ⟨hal-03059771⟩

Relations

199 View
107 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More