Optically variable devices (OVDs) are in tremendous demand as optical indicators against
the increasing threat of counterfeiting. Conventional OVDs are exposed to the danger of …

Integrated-resonant units (IRUs), associating various meta-atoms, resonant modes, and
functionalities into one supercell, have been promising candidates for tailoring composite …

A lightweight and portable spectrometer is desirable for miniaturization and integration. The
unprecedented capability of optical metasurfaces has shown much promise to perform such …

Vectorial holography has gained a lot of attention due to the promise of versatile polarization
control of structured light for enhanced optical security and multi-channel optical …

The rapid detection of biological and chemical substances in real time is particularly
important for public health and environmental monitoring and in the military sector. If the …

Symmetric spin–orbit interaction (SOI)‐based approaches apply a practical limit on helicity
multiplexed metaoptics, ie, center symmetric information encoding. Contrarily, asymmetric …

The efficiency of traditional solar cells is constrained due to the Shockley–Queisser limit, to
circumvent this theoretical limit, the concept of solar thermophotovoltaics (STPVs) has been …

Secure packaging and transportation of light-sensitive chemical and biomedical test tubes
are crucial for environmental protection and public health. Benefiting from the compact form …

Flat optics, realized by the artificially created 2D material platform called optical
metasurfaces, is currently undergoing a science‐to‐technology transition. However,“real …

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 …