(a) Superresolution and supersensitive it. Examples of interference fringes of (i) a single photon interference fringe (dot-dash line, sin ϕ), (ii) interference fringe at twice the resolution from a two-photon NOON state (solid line, sin 2ϕ), and (iii) interference fringe obtained from classical light at twice the resolution, with reduced visibility (dashed line, 1/2sin 2ϕ). Example schematics of two-photon and classical-light interferometers. (b) Illustration of an n-photon Fock state in a diffraction limited beam falling on an array of detectors smaller than the beam. The optical centroid measurement uses post processing to harness all of the photon detection events to scalably detect the Fock state. Without this - even with photon-number-resolving single-photon detectors that are smaller than a diffraction limited spot - one cannot efficiently detect the Fock state.(n)
Dr Jonathan Matthews of CQP was invited to publish a viewpoint in APS Physics on Scalable Imaging of Superresolution. The viewpoint discussed the research undertaken at University of Toronto which supposedly demonstrates a viable approach to efficiently observing superresolved spatial interference fringes that could improve the precision of imaging and lithography systems.
Jonathan Matthews is a Leverhulme Trust Early Career Research Fellow at the Centre for Quantum Photonics, . Originally a mathematics graduate, he received his physics Ph.D. in 2011 at the University of Bristol, for implementing integrated quantum photonic circuitry for multiphoton demonstrations of quantum technology. His research interests include quantum metrology, analog quantum simulations, and quantum computing componentry. He now leads the quantum metrology research at the Centre for Quantum Photonics.
The entire viewpoint which can be found on the APS Physics website was published on 2nd June.