Molecules as sources for indistinguishable single photons

Ahtee, Ville; Lettow, Robert; Pfab, Robert; Renn, Alois; Ikonen, Erkki; Götzinger, Stephan; Sandoghdar, Vahid

doi:10.1080/09500340802464657

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Molecules as sources for indistinguishable single photons

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Ahtee, V., Lettow, R., Pfab, R., Renn, A., Ikonen, E., Götzinger, S., et al. (2009). Molecules as sources for indistinguishable single photons. Journal of Modern Optics, 56: PII 907848818, pp. 161-166. doi:10.1080/09500340802464657.

Cite as: https://hdl.handle.net/21.11116/0000-0002-9A76-C

Abstract

We report on the triggered generation of identical photons by solid-state single-photon sources in two separate cryogenic laser scanning microscopes. Organic fluorescent molecules were used as emitters and investigated by means of high resolution laser spectroscopy. Continuous-wave photon correlation measurements on individual molecules proved the isolation of single quantum systems. By using frequency selective pulsed excitation of the molecule and efficient spectral filtering of its emission, we produced triggered Fourier-limited single photons. In a further step, local electric fields were applied to match the emission wavelengths of two different molecules via Stark effect. Identical single photons are indispensable for the realization of various quantum information processing schemes proposed. The solid-state approach presented here paves the way to the integration of multiple bright sources of single photons on a single chip.