6 May 2011 Polarization entangled states measurement on a chip
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Abstract
The emerging strategy to overcome the limitations of bulk quantum optics consists of taking advantage of the robustness and compactness achievable by the integrated waveguide technology. Here we report the realization of a directional coupler, fabricated by femtosecond laser waveguide writing, acting as an integrated beam splitter able to support polarization encoded qubits. This maskless and single step technique allows to realize circular transverse waveguide profiles able to support the propagation of Gaussian modes with any polarization state. Using this device, we demonstrate the quantum interference with polarization entangled states.
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Linda Sansoni, Linda Sansoni, Fabio Sciarrino, Fabio Sciarrino, Giuseppe Vallone, Giuseppe Vallone, Paolo Mataloni, Paolo Mataloni, Andrea Crespi, Andrea Crespi, Roberta Ramponi, Roberta Ramponi, Roberto Osellame, Roberto Osellame, } "Polarization entangled states measurement on a chip", Proc. SPIE 8072, Photon Counting Applications, Quantum Optics, and Quantum Information Transfer and Processing III, 80720Q (6 May 2011); doi: 10.1117/12.886485; https://doi.org/10.1117/12.886485
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