Tunable control of the frequency correlations of entangled photons.
We experimentally demonstrate a new technique to control the type of frequency correlations of entangled photon pairs generated by spontaneous parametric downconversion. Frequency-correlated and frequency-anticorrelated photons are produced when a broadband pulse is used as a pump. The method is based on the control of the group velocities of the interacting waves and can be applied in any nonlinear medium and frequency band of interest.
Hendrych
M
M
ICFO-Institut de Ciencies Fotoniques, and Department of Signal Theory and Communications, Universitat Politecnicade Catalunya, Castelldefels, 08860 Barcelona, Spain. martin.hendrych@icfo.es
Micuda
M
M
Torres
J P
JP