Room remperature source of single photons of definite polarization

S. G. Lukishova, A. W. Schmid, R. Knox, P. Freivald, L. J. Bissell,
R. W. Boyd, C. R. Stroud, Jr., K. L. Marshall

Journal of Modern Optics 54, 417 (2007).

A definite polarization in fluorescence from single emitters (dye molecules) at room temperature is demonstrated. A planar-aligned, nematic liquid-crystal host provides definite alignment of single dye molecules in a preferred direction. Well-defined polarized fluorescence from single emitters (single photon source) is important for applications in photonic quantum information. Polarized singlephoton sources based on single emitters, for example, are key hardware elements both for absolutely secure quantum communication and quantum computation systems.

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