Abstract

Beamlike twin-photon generation by use of type II spontaneous parametric downconversion is demonstrated. The intensity distribution of each beam is round, and the emission angle is very small (0.9°). As a result, a high coincidence-count rate per unit of pump power was recorded. The ratio of coincidence-count rate to single-count rate was estimated to be 80% in this experiment. These features suggest that this method is useful for generation of a single-photon state and is applicable to bright, entangled twin-photon sources.

© 2001 Optical Society of America

Ellipsometric measurements by use of photon pairs generated by spontaneous parametric downconversion

Ayman F. Abouraddy, Kimani C. Toussaint, Alexander V. Sergienko, Bahaa E. A. Saleh, and Malvin C. Teich
Opt. Lett. 26(21) 1717-1719 (2001)

Generation of correlated photons in controlled spatial modes by downconversion in nonlinear waveguides

Konrad Banaszek, Alfred B. U’Ren, and Ian A. Walmsley
Opt. Lett. 26(17) 1367-1369 (2001)

Measurement of the spectral properties of the two-photon state generated via type II spontaneous parametric downconversion

Yoon-Ho Kim and Warren P. Grice
Opt. Lett. 30(8) 908-910 (2005)

Efficient heralding of polarization-entangled photons from type-0 and type-II spontaneous parametric downconversion in periodically poled KTiOPO₄

Fabian Steinlechner, Marta Gilaberte, Marc Jofre, Thomas Scheidl, Juan P. Torres, Valerio Pruneri, and Rupert Ursin
J. Opt. Soc. Am. B 31(9) 2068-2076 (2014)

Photon antibunching in the fluorescence of a single dye molecule embedded in a thin polymer film

François Treussart, André Clouqueur, Carl Grossman, and Jean-François Roch
Opt. Lett. 26(19) 1504-1506 (2001)