paper

Subdiffraction incoherent optical imaging via spatial-mode demultiplexing: semiclassical treatment

arXiv:1703.08833 · doi:10.1103/PhysRevA.97.023830

Abstract

I present a semiclassical analysis of a spatial-mode demultiplexing (SPADE) measurement scheme for far-field incoherent optical imaging under the effects of diffraction and photon shot noise. Building on previous results that assume two point sources or the Gaussian point-spread function, I generalize SPADE for a larger class of point-spread functions and evaluate its errors in estimating the moments of an arbitrary subdiffraction object. Compared with the limits to direct imaging set by the Cramér-Rao bounds, the results show that SPADE can offer far superior accuracy in estimating the second and higher-order moments.

20 pages, 8 figures, 1 table. v5: same as the accepted version except Appendix C, which is much simplified here---the simplification was discovered too late to be included in the published version

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