Within the electromagnetic middle ground between microwaves and visible light lies terahertz radiation, and the promise of "T-ray vision."
Optics & Photonics
Nov 14, 2019
2
465
A new study demonstrates that the recovery of the Antarctic Ozone Hole causes decreases in clouds over Southern Hemisphere (SH) high latitudes and increases in clouds over the SH extratropics. The decrease in clouds leads ...
Earth Sciences
Sep 30, 2019
0
35
What may be viewed as the world's smallest incandescent lightbulb is shining in a Rice University engineering laboratory with the promise of advances in sensing, photonics and perhaps computing platforms beyond the limitations ...
Nanophysics
Sep 19, 2019
1
766
I am often asked how carbon dioxide can have an important effect on global climate when its concentration is so small—just 0.041% of Earth's atmosphere. And human activities are responsible for just 32% of that amount.
Environment
Sep 13, 2019
4
38
Movies featuring heroes with superpowers, such as flight, X-ray vision or extraordinary strength, are all the rage. But while these popular characters are mere flights of fancy, scientists have used nanoparticles to confer ...
Nanomaterials
Aug 27, 2019
3
460
The ever-more-humble carbon nanotube may be just the device to make solar panels—and anything else that loses energy through heat—far more efficient.
Nanophysics
Jul 12, 2019
4
2135
With a light-spinning device inspired by the Japanese art of paper cutting, University of Michigan researchers have detected microscopic twists in the internal structure of plant and animal tissue without harmful X-rays.
Materials Science
Jul 02, 2019
0
1
Astronomers at the University of Bonn and their colleagues from Moscow have identified an unusual celestial object. It is most likely the product of the fusion of two stars that died a long time ago. After billions of years ...
Astronomy
May 21, 2019
2
435
A team of researchers affiliated with several institutions in France has found that amyloid fibrils lit with near-infrared radiation emit a dim, near-infrared signal. In their paper published in the journal Nature Photonics, ...
In materials science, achromatic optical components can be designed with high transparency and low dispersion. Materials scientists have shown that although metals are highly opaque, densely packed arrays of metallic nanoparticles ...
Infrared (IR) radiation is electromagnetic radiation whose wavelength is longer than that of visible light (400-700 nm), but shorter than that of terahertz radiation (100 µm - 1 mm) and microwaves (~30,000 µm). Infrared radiation spans roughly three orders of magnitude (750 nm and 100 µm).
Direct sunlight has a luminous efficacy of about 93 lumens per watt of radiant flux, which includes infrared (47% share of the spectrum), visible (46%), and ultra-violet (only 6%) light. Bright sunlight provides luminance of approximately 100,000 candela per square meter at the Earth's surface.
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