Researchers have shown that 3D laser printing can be used to fabricate a high-quality, complex polymer optical device directly on the end of an optical fiber. This type of micro-optical device—which has details smaller ...
Optics & Photonics
Oct 3, 2022
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387
When an optical pulse train is delivered, two-photon absorption (TPA)-induced pumping causes considerable and quick gain and phase shifts in the carrier reservoir semiconductor optical amplifier (CR-SOA).
Optics & Photonics
Jul 6, 2022
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22
In a new publication from Opto-Electronic Advances, authors from the Laser Engineering Group in the School of Engineering at the University of Liverpool, Liverpool, United Kingdom, discuss two-photon absorption and stimulated ...
Optics & Photonics
Feb 17, 2022
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6
An international team of astronomers has unveiled the nature of hundreds of gamma-ray emitting sources, discovering that most of them belong to the class of active galaxies known as blazars.
Astronomy
Oct 11, 2021
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1341
Natural and manmade physical structures all lose energy, and scientists work hard to eliminate that loss or compensate for it. Optical and photonic devices lose energy through light scattering, radiation or material absorption. ...
Optics & Photonics
Sep 10, 2021
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208
A first-of-its-kind instrument that samples smoke from megafires and scans humidity will help researchers better understand the scale and long-term impact of fires—specifically how far and high the smoke will travel; when ...
Environment
Mar 29, 2021
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163
Optical sensors can quantitatively analyze chemical and biological samples by measuring and processing the optical signals produced by the samples. Optical sensors based on infrared absorption spectroscopy can achieve high ...
Analytical Chemistry
Jan 13, 2021
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7
Melanin's high refractive index (RI) and broadband absorption capability contribute to the pigment's ability to protect against ultraviolet radiation (UV). These optical properties also contribute to the vibrant structural ...
Materials Science
Nov 26, 2020
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138
Northwestern University researchers have developed a new low-cost, relatively simple strategy for designing materials used in live cell imaging, photodynamic therapy for cancer and night-vision technologies.
Materials Science
Sep 21, 2020
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140
Electronic properties of materials can be directly influenced via light absorption in under a femtosecond (10-15 seconds), which is regarded as the limit of the maximum achievable speed of electronic circuits. In contrast, ...
General Physics
Jun 26, 2019
0
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