Two-photon interferences and twisted NOON-states using structured photons

Markus Hiekkamäki; Robert Fickler

doi:10.1117/12.2595715

1 August 2021 Two-photon interferences and twisted NOON-states using structured photons

Markus Hiekkamäki, Robert Fickler

Author Affiliations +

Proceedings Volume 11818, Laser Beam Shaping XXI; 118180A (2021) https://doi.org/10.1117/12.2595715
Event: SPIE Optical Engineering + Applications, 2021, San Diego, California, United States

Abstract

Structured photons often serve as physical realizations of high-dimensional quantum states beneficial to quantum information. One popular way of discretizing the space is through Laguerre-Gaussian modes that can have twisted phase front and, thus, orbital angular momentum (OAM). We demonstrate that using multi-plane light-conversion techniques enables the performance of complex unitary transformations between multiple input-modes and output-modes in the quantum regime. We demonstrate various complex two-photon interferences observed in spatial modes, thereby realizing a linear optical network along a single beam path. Finally, we show that using this ability allows the generation of spatial-mode NOON-states, which offer angular super-sensitivity.

Conference Presentation

Citation Download Citation

Markus Hiekkamäki and Robert Fickler "Two-photon interferences and twisted NOON-states using structured photons", Proc. SPIE 11818, Laser Beam Shaping XXI, 118180A (1 August 2021); https://doi.org/10.1117/12.2595715

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