Position controlled nanowires for infrared single photon emission

We report the experimental demonstration of single-photon and cascaded photon pair emission in the infrared, originating from a single InAsP quantum dot embedded in a standing InP nanowire. A regular array of nanowires is fabricated by epitaxial growth on an electron-beam patterned substrate. Photoluminescence spectra taken on single quantum dots show narrow emission lines. Superconducting single photon detectors, which have a higher sensitivity than avalanche photodiodes in the infrared, enable us to measure auto and cross correlations. Clear antibunching is observed [g(2)(0) = 0.12] and we show a biexciton–exciton cascade, which can be used to create entangled photon pairs.

[1]  N. Gregersen,et al.  A highly efficient single-photon source based on a quantum dot in a photonic nanowire , 2010 .

[2]  Charles M. Lieber,et al.  Epitaxial core–shell and core–multishell nanowire heterostructures , 2002, Nature.

[3]  A. A. Gorbunov,et al.  Fine structure of neutral and charged excitons in self-assembled In(Ga)As/(Al)GaAs quantum dots , 2002 .

[4]  V. Zwiller,et al.  Single quantum dot nanowire LEDs. , 2007, Nano letters.

[5]  Jean-Michel Gérard,et al.  Quantum Cascade of Photons in Semiconductor Quantum Dots , 2001 .

[6]  Mats-Erik Pistol,et al.  Single quantum dots emit single photons at a time: Antibunching experiments , 2001 .

[7]  G. Bester,et al.  Nanowire quantum dots as an ideal source of entangled photon pairs. , 2009, Physical review letters.

[8]  Val Zwiller,et al.  Single electron charging in optically active nanowire quantum dots. , 2010, Nano letters.

[9]  O. Okunev,et al.  Picosecond superconducting single-photon optical detector , 2001 .

[10]  P. Petroff,et al.  Nonclassical radiation from a single self-assembled InAs quantum dot , 2001 .

[11]  Elisabeth Müller,et al.  Optically bright quantum dots in single Nanowires. , 2005, Nano letters.

[12]  Takashi Fukui,et al.  Controlled growth of highly uniform, axial/radial direction-defined, individually addressable InP nanowire arrays , 2005 .

[13]  S. Dorenbos,et al.  Low noise superconducting single photon detectors on silicon , 2008 .

[14]  Michael G. Tanner,et al.  Enhanced telecom wavelength single-photon detection with NbTiN superconducting nanowires on oxidized silicon , 2010 .

[15]  B. Gerardot,et al.  Entangled photon pairs from semiconductor quantum dots. , 2005, Physical Review Letters.