Two-photon interference of temporally separated photons

We present experimental demonstrations of two-photon interference involving temporally separated photons within two types of interferometers: a Mach-Zehnder interferometer and a polarization-based Michelson interferometer. The two-photon states are probabilistically prepared in a symmetrically super...

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Published in:Scientific reports 2016-10, Vol.6 (1), p.34805-34805, Article 34805
Main Authors: Kim, Heonoh, Lee, Sang Min, Moon, Han Seb
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Experiments
Humanities and Social Sciences
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Photons
Polarization
Quantum physics
Science
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description We present experimental demonstrations of two-photon interference involving temporally separated photons within two types of interferometers: a Mach-Zehnder interferometer and a polarization-based Michelson interferometer. The two-photon states are probabilistically prepared in a symmetrically superposed state within the two interferometer arms by introducing a large time delay between two input photons; this state is composed of two temporally separated photons, which are in two different or the same spatial modes. We then observe two-photon interference fringes involving both the Hong-Ou-Mandel interference effect and the interference of path-entangled two-photon states simultaneously in a single interferometric setup. The observed two-photon interference fringes provide simultaneous observation of the interferometric properties of the single-photon and two-photon wavepackets. The observations can also facilitate a more comprehensive understanding of the origins of the interference phenomena arising from spatially bunched/anti-bunched two-photon states comprised of two temporally separated photons within the interferometer arms.
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subjects 639/624/400/3925
639/624/400/482
639/766/483/3925
Experiments
Humanities and Social Sciences
multidisciplinary
Photons
Polarization
Quantum physics
Science
title Two-photon interference of temporally separated photons
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