Amplitude and phase modulation of time-energy entangled two-photon states.
We experimentally demonstrate amplitude and phase modulation of a time-energy entangled two-photon wave function. The entangled photons are produced by spontaneous parametric down-conversion, spectrally dispersed in an prism compressor, modulated in amplitude and/or phase, and detected in coincidence by sum-frequency generation. First, we present a Fourier optical analysis of the optical setup yielding an analytic expression for the resulting field distribution at the exit plane of the shaping apparatus. We then introduce amplitude and/or phase shaping and present results which can only be obtained through a combination of the two. Specifically, we use a shaper-based interferometer to measure the two-photon interference of an almost bandwidth-limited two-photon wave function.
University of Bern, Institute of Applied Physics, Bern, Switzerland. florian.zaeh@iap.unibe.ch
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D003198:Computer Simulation; D004735:Energy Transfer; D008027:Light; D008962:Models, Theoretical; D010783:Photometry / Q000379:methods*; D017785:Photons; D012542:Scattering, Radiation