Open AccessPhoton Pairs from Resonant Metasurfaces
Author(s) -
Tomás Santiago-Cruz,
Anna Fedotova,
Vitaliy Sultanov,
Maximilian A. Weissflog,
Dennis Arslan,
Mohammadreza Younesi,
Thomas Pertsch,
Isabelle Staude,
Frank Setzpfandt,
Maria V. Chekhova
Publication year - 2021
Publication title -
nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.853
H-Index - 488
eISSN - 1530-6992
pISSN - 1530-6984
DOI - 10.1021/acs.nanolett.1c01125
Subject(s) - photon , lithium niobate , quantum optics , spontaneous parametric down conversion , physics , optoelectronics , optics , quantum , quantum imaging , dielectric , wavelength , photon entanglement , quantum information , quantum network , quantum entanglement , quantum mechanics
All-dielectric optical metasurfaces are a workhorse in nano-optics, because of both their ability to manipulate light in different degrees of freedom and their excellent performance at light frequency conversion. Here, we demonstrate first-time generation of photon pairs via spontaneous parametric-down conversion in lithium niobate quantum optical metasurfaces with electric and magnetic Mie-like resonances at various wavelengths. By engineering the quantum optical metasurface, we tailor the photon-pair spectrum in a controlled way. Within a narrow bandwidth around the resonance, the rate of pair production is enhanced up to 2 orders of magnitude, compared to an unpatterned film of the same thickness and material. These results enable flat-optics sources of entangled photons-a new promising platform for quantum optics experiments.