Temporal shaping of entangled photons.
We experimentally demonstrate shaping of the two-photon wave function of entangled-photon pairs, utilizing coherent pulse-shaping techniques. By performing spectral-phase manipulations we tailor the second-order correlation function of the photons exactly like a coherent ultrashort pulse. To observe the shaping we perform sum-frequency generation with an ultrahigh flux of entangled photons. At the appropriate conditions, sum-frequency generation performs as a coincidence detector with an ultrashort response time (approximately 100 fs), enabling a direct observation of the two-photon wave function. This property also enables us to demonstrate background-free, high-visibility two-photon interference oscillations.
Pe'er
Avi
A
Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot 76100, Israel.
Dayan
Barak
B
Friesem
Asher A
AA
Silberberg
Yaron
Y