Bright Phonon-Tuned Single-Photon Source.
Bright single photon sources have recently been obtained by inserting solid-state emitters in microcavities. Accelerating the spontaneous emission via the Purcell effect allows both high brightness and increased operation frequency. However, achieving Purcell enhancement is technologically demanding because the emitter resonance must match the cavity resonance. Here, we show that this spectral matching requirement is strongly lifted by the phononic environment of the emitter. We study a single InGaAs quantum dot coupled to a micropillar cavity. The phonon assisted emission, which hardly represents a few percent of the dot emission at a given frequency in the absence of cavity, can become the main emission channel by use of the Purcell effect. A phonon-tuned single photon source with a brightness greater than 50% is demonstrated over a detuning range covering 10 cavity line widths (0.8 nm). The same concepts applied to defects in diamonds pave the way toward ultrabright single photon sources operating at room temperature.
CNRS-LPN Laboratoire de Photonique et de Nanostructures, Route de Nozay , 91460 Marcoussis, France.
Simone Luca
SL
Portalupi
CEA/CNRS/UJF joint team "Nanophysics and Semiconductors", Institut Néel-CNRS, BP 166, 25 rue des Martyrs, 38042 Grenoble Cedex 9, France.
Gaston
G
Hornecker
CNRS-LPN Laboratoire de Photonique et de Nanostructures, Route de Nozay , 91460 Marcoussis, France.
Valérian
V
Giesz
CEA/CNRS/UJF joint team "Nanophysics and Semiconductors", Institut Néel-CNRS, BP 166, 25 rue des Martyrs, 38042 Grenoble Cedex 9, France.
Thomas
T
Grange
CNRS-LPN Laboratoire de Photonique et de Nanostructures, Route de Nozay , 91460 Marcoussis, France.
Aristide
A
Lemaître
CNRS-LPN Laboratoire de Photonique et de Nanostructures, Route de Nozay , 91460 Marcoussis, France.
Justin
J
Demory
CNRS-LPN Laboratoire de Photonique et de Nanostructures, Route de Nozay , 91460 Marcoussis, France.
Isabelle
I
Sagnes
CNRS-LPN Laboratoire de Photonique et de Nanostructures, Route de Nozay , 91460 Marcoussis, France.
Norberto D
ND
Lanzillotti-Kimura
CNRS-LPN Laboratoire de Photonique et de Nanostructures, Route de Nozay , 91460 Marcoussis, France.|Département de Physique, Université Paris Diderot , 4 rue Elsa Morante, 75013 Paris, France.
Loïc
L
Lanco
CEA/CNRS/UJF joint team "Nanophysics and Semiconductors", Institut Néel-CNRS, BP 166, 25 rue des Martyrs, 38042 Grenoble Cedex 9, France.
Alexia
A
Auffèves
CNRS-LPN Laboratoire de Photonique et de Nanostructures, Route de Nozay , 91460 Marcoussis, France.|Département de Physique, Ecole Polytechnique , F-91128 Palaiseau, France.
Pascale
P
Senellart
NV centers; Purcell enhancement; micropillar cavity; phonon; photon; quantum dot