Compared with conventional optical elements, 2D photonic metasurfaces, consisting of
arrays of antennas with subwavelength thickness (the 'meta-atoms'), enable the …

When light interacts with metal nanostructures, it can couple to free-electron excitations near
the metal surface. The electromagnetic resonances associated with these surface plasmons …

Optical non-linear phenomena are typically observed in natural materials interacting with
light at high intensities, and they benefit a diverse range of applications from communication …

For nearly two decades, researchers in the field of plasmonics—which studies the coupling
of electromagnetic waves to the motion of free electrons near the surface of a metal—have …

Optical metasurfaces are thin‐layer subwavelength‐patterned structures that interact
strongly with light. Metasurfaces have become the subject of several rapidly growing areas …

The capability of locally engineering the nonlinear optical properties of media is crucial in
nonlinear optics. Although poling is the most widely employed technique for achieving …

Optical harmonic generation occurs when high intensity light (> 1010 W m–2) interacts with
a nonlinear material. Electrical control of the nonlinear optical response enables …

Nonlinear optical frequency conversion, in which optical fields interact with a nonlinear
medium to produce new field frequencies, is ubiquitous in modern photonic systems …

Broken symmetries induce strong even-order nonlinear optical responses in materials and
at interfaces. Unlike conventional covalently bonded nonlinear crystals, van der Waals …

The ability to convert low-energy quanta into a quantum of higher energy is of great interest
for a variety of applications, including bioimaging, drug delivery and photovoltaics. Although …