Nanostructured surfaces with designed optical functionalities, such as metasurfaces, allow
efficient harvesting of light at the nanoscale, enhancing light–matter interactions for a wide …

Infrared spectroscopy provides unique information on the composition and dynamics of
biochemical systems by resolving the characteristic absorption fingerprints of their …

Thermal emission—the process through which all objects with a finite temperature radiate
electromagnetic energy—has generally been thought to obey reciprocity, where the …

Thermal emission from a hot body is inherently challenging to control due to its incoherent
nature. Recent advances have shown that patterned surfaces can transform thermal …

Metasurfaces have been enabling the miniaturization and integration of complex optical
functionalities within an ultrathin platform by engineering the scattering features of localized …

The coupled interactions among the fundamental carriers of charge, heat, and
electromagnetic fields at interfaces and boundaries give rise to energetic processes that …

We visualized negative refraction of phonon polaritons, which occurs at the interface
between two natural crystals. The polaritons—hybrids of infrared photons and lattice …

A classical thermal source, such as an incandescent filament, radiates according to Planck's
law. The feasibility of super-Planckian radiation has been investigated with sub-wavelength …

Thermal emissions with high coherence, although not as high as those of lasers, still play a
crucial role in many practical applications. In this work, by exploiting the geometric …

Thermal emission caused by the thermal motion of the charged particles is commonly
broadband, un-polarized, and incoherent, like a melting pot of electromagnetic waves, which …