Position controlled nanowires for infrared single photon emission

Creators: Dorenbos, S. N.; Sasakura, H.; van Kouwen, M. P.; Akopian, N.; Adachi, S.; Namekata, N.; Jo, M.; Motohisa, J.; Kobayashi, Y.; Tomioka, K.; Fukui, T.; Inoue, S.; Kumano, H.; Natarajan, C. M.; Hadfield, R. H.; Zijlstra, T.; Klapwijk, T. M.; Zwiller, V.; Suemune, I.

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Abstract

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 InPnanowire. A regular array of nanowires is fabricated by epitaxialgrowth 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.

Additional Information

© 2010 American Institute of Physics. Received 25 August 2010; accepted 6 October 2010; published online 28 October 2010. This work was supported in part by the Grant-in-Aid for Young Scientists (B), Grant No. 20760002 and GCOE-GSIST, Hokkaido University. S.D., M.K., N.A., and V.Z. acknowledge funding from NWO. C.M.N. and R.H.H. are supported by EPSRC (UK). R.H.H. acknowledges a Royal Society University Research Fellowship.

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