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Temporal shaping of entangled photons

Avi pe'er·Barak Dayan·Asher A. Friesem·Yaron Silberberg
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Abstract

We experimentally demonstrate shaping of the two-photon wavefunction of entangled photon-pairs, utilizing coherent pulse-shaping techniques. By performing spectral-phase manipulations we tailor the two-photon wavefunction exactly like a coherent ultrashort pulse. To observe the shaping we perform sum-frequency generation (SFG) with an ultrahigh flux of entangled photons. At the appropriate conditions, SFG performs as a coincidence detector with an ultrashort response time (~100 fs), enabling a direct observation of the two-photon wavefunction. This property also enables us to demonstrate background-free, high-visibility two-photon interference oscillations.

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Avi pe'er, Barak Dayan, Asher A. Friesem, Yaron Silberberg. 2004-12-30. Temporal shaping of entangled photons. https://doi.org/10.1103/physrevlett.94.073601

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