In a paper published July 24 in the journal Nature Nanotechnology, a team of Caltech engineers reports building a metasurface patterned with miniscule tunable antennas capable of reflecting an ...

NTT Corp. (NTT) and Tokyo Denki University, both based in Japan, have succeeded in further stabilizing the output of an optical frequency ruler generated by modulating the intensity and phase of laser ...

A new metasurface design lets light of different spins bend, focus, and behave independently—while staying sharp across many ...

Using two optical frequency combs and a photon counter, the experiments open up exciting prospects for conducting dual-comb spectroscopy in low-light conditions and they pave the way for novel ...

KAIST researchers tested optical frequency comb lasers as reference signals for radio astronomy, aiming to synchronize radio telescopes with light-based timing in VLBI observations.

The Korea Research Institute of Standards and Science has successfully developed a length measurement system that achieves a level of precision approaching the theoretical limit allowed by quantum ...

Researchers propose a method to detect and map low-frequency excitations in nonlinear materials at nanometer resolution, ...

Chinese scientists have pushed solid-state vacuum ultraviolet laser technology to a new milestone by ...

Dispersion is an inherent feature of electromagnetic waves. It allows light to behave differently at different wavelengths, which can be useful, but it also creates chromatic aberrations. As bandwidth ...

Astronomers and physicists have long used a laser-based sensor called an “optical frequency comb” to study the material makeup of the cosmos and to make timekeeping more accurate. But the COVID ...