Interference of single photons from two separate semiconductor quantum dots

Edward B. Flagg; Andreas Muller; Sergey V. Polyakov; Alex Ling; Alan Migdall; Glenn S. Solomon

doi:10.1117/12.874853

17 February 2011 Interference of single photons from two separate semiconductor quantum dots

Edward B. Flagg, Andreas Muller, Sergey V. Polyakov, Alex Ling, Alan Migdall, Glenn S. Solomon

Proceedings Volume 7948, Advances in Photonics of Quantum Computing, Memory, and Communication IV; 794818 (2011) https://doi.org/10.1117/12.874853
Event: SPIE OPTO, 2011, San Francisco, California, United States

Abstract

We demonstrate interference between discrete photons emitted by two different semiconductor quantum dots and quantify their degree of indistinguishability. The quantum dot emission energies are tuned into resonance by straining the samples. Upon interference on a beamsplitter, the photons are shown to be 18.1% indistinguishable, resulting in a coincidence detection rate below the classical limit. Post-selecting only those detections occurring within a short time of each other increases the measured indistinguishability to 47%. The photons are partially distinguishable due to dephasing of the exciton states, and post-selection is also affected by the detector response time.

Citation Download Citation

Edward B. Flagg, Andreas Muller, Sergey V. Polyakov, Alex Ling, Alan Migdall, and Glenn S. Solomon "Interference of single photons from two separate semiconductor quantum dots", Proc. SPIE 7948, Advances in Photonics of Quantum Computing, Memory, and Communication IV, 794818 (17 February 2011); https://doi.org/10.1117/12.874853

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