Gas sensors based on photoacoustic spectroscopy (PAS) have advantages of tunable diode laser absorption spectroscopy (TDLAS), such as high sensitivity, high selectivity, and wide dynamic range. The sensor performance required ...
Optics & Photonics
Oct 12, 2022
0
47
On-chip laser frequency combs—lasers that emit multiple frequencies or colors of light simultaneously separated like the tooth on a comb—are a promising technology for a range of applications including environmental monitoring, ...
Optics & Photonics
Sep 7, 2022
0
328
Researchers led by Ou Xin from the Shanghai Institute of Microsystem and Information Technology (SIMIT) of the Chinese Academy of Sciences have recently comprehensively reviewed milestones and challenges in silicon carbide ...
Optics & Photonics
Aug 31, 2022
0
26
Sensitive animal noses can sniff out trace particles, such as volatile organic compounds, in the ambient air. Humans, on the other hand, are developing innovative technologies for this purpose, such as optical spectroscopy. ...
Optics & Photonics
Aug 24, 2022
0
405
For signals barely larger than the noise in a system, measurement is generally a trade-off between speed and precision. Averaging over several measurements reduces the influence of noise but takes (a lot of) time. That could ...
Optics & Photonics
Jun 28, 2022
0
219
High-accuracy spatially and temporally resolved temperature sensing is critical and has broad applications in diverse fields, such as industrial manufacturing, environmental protection, and healthcare monitoring. Optical-based ...
Optics & Photonics
May 13, 2022
0
35
The vibrational modes of nanomechanical resonators are analogous to different notes of a guitar string and have similar properties such as frequency (pitch) and lifetime. The lifetime is characterized by the quality factor, ...
Nanophysics
May 12, 2022
1
173
An international team of researchers led by Professor Min Seok Jang of KAIST and Professor Victor W. Brar of the University of Wisconsin-Madison has demonstrated a widely applicable methodology enabling a full 360° active ...
Optics & Photonics
May 2, 2022
0
111
Technology is increasingly moving towards miniaturization and energy efficiency. This also applies to electronic chips. Light, and optics more broadly, are functional in making compact and portable chips. Researchers from ...
Optics & Photonics
Jan 7, 2022
0
147
Conventional microscopes produce enlarged images of small structures or objects with the help of light. Nanoparticles, however, are so small that they hardly absorb or scatter light and, hence, remain invisible. Optical resonators ...
Nanophysics
Nov 11, 2021
0
81
