Signal processing is of critical importance for various science and technology fields. Analog
optical processing can provide an effective solution to perform large-scale and real-time …

Image processing is of fundamental importance for numerous modern technologies. In
recent years, due to increasing demand for real-time and continuous data processing …

Optical metasurfaces have been recently explored as ultrathin analog image differentiators.
By tailoring the momentum transfer function, they can perform efficient Fourier filtering—and …

Optical metasurfaces have enabled analog computing and image processing within sub-
wavelength footprints, and with reduced power consumption and faster speeds. While …

Here we present a roadmap on Photonic metasurfaces. This document consists of a number
of perspective articles on different applications, challenge areas or technologies underlying …

Digital signal processing has revolutionized many fields of science and engineering, but it
still shows critical limits, mainly related to the complexity, power consumption, and limited …

As an important method of image processing, image differentiation enables edge detection
of targets to achieve recognition of object features and information compression and the …

Nonlinear optical processes lie at the heart of frequency tunable coherent light sources,
including entangled photon sources and squeezed states of light, and they have become …

Analog computation with passive optical components can enhance processing speeds and
reduce power consumption, recently attracting renewed interest thanks to the opportunities …

The transport of intensity equation (TIE), a noninterferometric method for quantitative phase
imaging (QPI), enables the characterization of transparent objects and is widely applied in …