Wavefront shaping of spatially entangled photons

by Yaron Bromberg

at Quantum optics seminar

Thu, 27 Dec 2018, 15:30
Physics building (#54) room 207

Abstract

In recent years we are witnessing rapid developments of quantum technologies in a wide range of applications including cryptography spectroscopy sensing and imaging However the implementation of quantum technologies in real world scenarios is still held back mostly due to the fragile nature of quantum states of light In many applications photons are sent through a scattering medium such as the earth s atmosphere forming speckle patterns For classical light recent breakthroughs in wavefront shaping have opened the door for fast compensation of scattering by precisely tailoring the optical wavefront However applying these methods to quantum light is extremely challenging due to the weak measured signals Here we extend wavefront shaping to the quantum domain We show that in the high spatial entanglement regime of spontaneous parametric down conversion SPDC compensating the scattering of entangled photons can be achieved by shaping the incident pump beam Surprisingly the two photon speckle pattern is identical to that of the pump beam thus allowing the pump beam intensity to be used as feedback for the optimization Using this novel method we compensate for the scattering of entangled SPDC light in real time and achieve enhancements comparable with those obtained for wavefront shaping of classical light

Created on 21-12-2018 by Bar Lev, Yevgeny (ybarlev)
Updaded on 21-12-2018 by Bar Lev, Yevgeny (ybarlev)