Resolution in Two-Photon Imaging: A Local Manifestation of Entanglement

Resolution in Two-Photon Imaging: A Local Manifestation of Entanglement

Článek WoS

The resolution of a classical imaging system is limited by diffraction. This limit can be overcome, for example, by implementing various forms of localization microscopy in which the center of a fluorescence distribution is estimated to an accuracy scaling with the square root of the number of detected photons, N . In quantum imaging the object can be illuminated using correlated photon-pairs, leading early work to suggest that a 2 improvement could be obtained as a result of averaging the position of N = 2 events. However, similar to quantum lithography, which relies upon quantum illumination using entangled photon-pairs and two-photon absorption, the minimum resolvable feature size is reduced by a factor of 2, not just 2 . Quantum imaging schemes can also lead to a factor of 2 improvement. By using a similar source of correlated photon-pairs to illuminate an object, a single-photon sensitive camera to detect the photon-pairs, and an image processing algorithm to record and sum the bisector positions of the transmitted photon-pairs, we realize a similar factor of x2 improvement in image resolution, surpassing that of most earlier quantum imaging work.

The resolution of a classical imaging system is limited by diffraction. This limit can be overcome, for example, by implementing various forms of localization microscopy in which the center of a fluorescence distribution is estimated to an accuracy scaling with the square root of the number of detected photons, N . In quantum imaging the object can be illuminated using correlated photon-pairs, leading early work to suggest that a 2 improvement could be obtained as a result of averaging the position of N = 2 events. However, similar to quantum lithography, which relies upon quantum illumination using entangled photon-pairs and two-photon absorption, the minimum resolvable feature size is reduced by a factor of 2, not just 2 . Quantum imaging schemes can also lead to a factor of 2 improvement. By using a similar source of correlated photon-pairs to illuminate an object, a single-photon sensitive camera to detect the photon-pairs, and an image processing algorithm to record and sum the bisector positions of the transmitted photon-pairs, we realize a similar factor of x2 improvement in image resolution, surpassing that of most earlier quantum imaging work.

Quantum Enhanced Imaging, Resolution Enhanced Imaging, Entanglement, SPDC Photon-Pairs, Single-PhotonSensitive Detection, EMCCD Camera

Quantum Enhanced Imaging, Resolution Enhanced Imaging, Entanglement, SPDC Photon-Pairs, Single-PhotonSensitive Detection, EMCCD Camera

GREGORY, T.; TONINELLI, E.; MOREAU, P.; MEKHAIL, S.; WOLLEY, O.; ROBERTS, K.; BĚLÍN, J.; BARNETT, S.; PADGETT, M.

15.10.2025

ACS Photonics

10

12

Spojené státy americké

5594

5604

11

https://pubs.acs.org/doi/10.1021/acsphotonics.5c01310