Single-photon sources based on single molecules in solids

Details Single-photon sources based on single molecules in solids Single-photon sources based on single molecules in solids

Jul 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004njph....6...88m&link_type=abstract

New Journal of Physics, Volume 6, Issue 1, pp. 88 (2004).

Physics

14

Scientific paper

Single molecules in suitable host crystals have been demonstrated to be useful single-photon emitters both at liquid-helium temperatures and at room temperature. The low-temperature source achieved controllable emission of single photons from a single terrylene molecule in p-terphenyl by an adiabatic rapid passage technique. In contrast with almost all other single-molecule systems, terrylene single molecules show extremely high photostability under continuous, high-intensity irradiation. A room-temperature source utilizing this material has been demonstrated, in which fast pumping into vibrational sidebands of the electronically excited state achieved efficient inversion of the emissive level. This source yielded a single-photon emission probability p(1) of 0.86 at a detected count rate near 300 000 photons s-1, with very small probability of emission of more than one photon. Thus, single molecules in solids can be considered as contenders for applications of single-photon sources such as quantum key distribution.

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