Polarization entangled state measurement on a chip

Linda Sansoni; Fabio Sciarrino; Giuseppe Vallone; Paolo Mataloni; Andrea Crespi; Roberta Ramponi; Roberto Osellame

doi:10.1117/12.886485

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6 May 2011 Polarization entangled states measurement on a chip

Linda Sansoni; Fabio Sciarrino; Giuseppe Vallone; Paolo Mataloni; Andrea Crespi; Roberta Ramponi; Roberto Osellame

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Proceedings Volume 8072, Photon Counting Applications, Quantum Optics, and Quantum Information Transfer and Processing III; 80720Q (2011) https://doi.org/10.1117/12.886485
Event: SPIE Optics + Optoelectronics, 2011, Prague, Czech Republic

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, Fabio Sciarrino, Giuseppe Vallone, Paolo Mataloni, Andrea Crespi, Roberta Ramponi, and 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); https://doi.org/10.1117/12.886485

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