The silicon nitride (Si 3 N 4) planar waveguide platform has enabled a broad class of low-
loss planar-integrated devices and chip-scale solutions that benefit from transparency over a …

A Fourier transform spectrometer (FTS) is recognized as a highly precise analytical
instrument for analyzing the constituent elements of matter in the fields of physics, chemistry …

Miniaturized spectrometers are of considerable interest for their portability. Most designs to
date employ a photodetector array with distinct spectral responses or require elaborated …

An optical design space that can highly benefit from the recent developments in
metasurfaces is the folded optics architecture where light is confined between reflective …

Photonic technologies offer numerous functionalities that can be used to realize
astrophotonic instruments. The most spectacular example to date is the ESO Gravity …

Despite the pressing demand for integrated spectrometers, a solution that deliver high-
performance while being practically operated is still missing. Furthermore, current integrated …

Adaptive optics (AO) is critical in astronomy, optical communications and remote sensing to
deal with the rapid blurring caused by the Earth's turbulent atmosphere. But current AO …

The spectral resolution and range of conventional spectrometers are typically limited by
optical aberrations of their focusing elements, mainly due to chromatically induced …

Motivated by applications in mobile optical sensing, ultracompact high‐resolution integrated
spectrometers have attracted much interest. Here, a high‐resolution integrated speckle …

Metasurfaces have been studied and widely applied to optical systems. A metasurface-
based flat lens (metalens) holds promise in wave-front engineering for multiple applications …