Biphoton interference with a quantum dot entangled light source

Stevenson, R. M. and Hudson, A. J. and Young, R. J. and Atkinson, P. and Cooper, K. and Ritchie, D. A. and Shields, A. J. (2007) Biphoton interference with a quantum dot entangled light source. Optics Express, 15 (10). pp. 6507-6512. ISSN 1094-4087

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We demonstrate optical interferometry beyond the limits imposed by the photon wavelength using 'triggered' entangled photon pairs from a semiconductor quantum dot. Interference fringes of the entangled biphoton state reveals a periodicity half of that obtained with the single photon, and much less than that of the pump laser. High fringe visibility indicates that biphoton interference is less sensitive to decoherence than interference of two sequential single photons. The results suggest that quantum interferometry may be possible using a semiconductor LED-like device. (C) 2007 Optical Society of America

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Optics Express
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07 Jun 2012 11:23
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21 Nov 2022 22:22