Two-Photon Airy Disk
Hai-Bo Wang, Xin-Bing Song, De-Qin Xu, Jun Xiong, Xiangdong Zhang, and, Kaige Wang

TL;DR
This paper demonstrates a quantum Airy disk diffraction pattern using entangled photons, achieving super-resolution beyond classical limits and controllable spot size, with potential applications in quantum lithography.
Contribution
First experimental observation of a quantum Airy disk with super-resolution using entangled photons in a Fraunhofer diffraction setup.
Findings
Quantum Airy disk surpasses classical diffraction limit
Spot size controllable by focal length
Potential for enhanced quantum lithography applications
Abstract
We report an experimental observation of quantum Airy disk diffraction pattern using an entangled two-photon source. In contrast to the previous quantum lithography experiments where the subwavelength diffraction patterns were observed in the far field limit, we perform the Fraunhofer diffraction experiment with a convex lens. The experimental result shows that the two-photon Airy disk is provided with the super-resolution spot, which surpasses the classical diffraction limit. In particular, the spot size can be well controlled by the focal length, which adapted to optical super-focusing. Our experiment can promote potential application of quantum lithography.
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Taxonomy
TopicsOrbital Angular Momentum in Optics · Near-Field Optical Microscopy · Cold Atom Physics and Bose-Einstein Condensates
