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light absorption News
Ultrablack Coatings Achieve Broadband Absorption for Precision Optics
SHANGHAI, March 21, 2024 — A broadband, ultrablack film from the University of Shanghai for Science and Technology and the Chinese Academy of Sciences could enhance the performance of telescopes among other applications in space exploration and precision optics. In tests, the film achieved an average absorption as high as 99.4%, within a wavelength range of 400 to 1000 nm. Optical devices that require ultrablack coating for stray light suppression often exhibit significant curvature and intricate shapes,
Thin-film Silicon Photodetector Rivals III-V Counterparts
DAVIS, Calif., Aug. 7, 2023 — Researchers at the University of California, Davis (UC Davis) are developing a strategy to boost the light absorption of thin silicon films. The team demonstrated silicon-based photodetectors with light-trapping micro- and nano-surface structures,...
Light Trap Provides Near Perfect Absorption
VIENNA, Sept. 22, 2022 — Maximizing light absorption is essential for photovoltaics and many other photonic applications. It is also difficult, especially when the light is being absorbed by a thin layer of material that would normally allow a large portion of the light to...
Infrared Metamaterial Absorber Shows Promise in Radiative Cooling
JILIN CITY, China, Feb. 10, 2022 — Researchers from the State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics (CIOMP) of the Chinese Academy of Sciences (CAS) have proposed a broadband, polarization- and angle-insensitive metamaterial...
Researchers Engineer Optical Losses to Perfect Absorption
ST. LOUIS, Sept. 17, 2021 — Research conducted by a team from Washington University in St. Louis, in collaboration with A. Douglas Stone of Yale University, has uncovered new approaches to manipulating light absorption in optical resonators by different types of optical...
Ultrablack Coating Is 10× Darker Than Other Very Black Materials
CAMBRIDGE, Mass., Sept. 16, 2019 — MIT engineers have developed a material that they say is 10× blacker than anything that has previously been reported. The material is made from vertically aligned carbon nanotubes that the team grew on a surface of sodium chloride-etched aluminum...
Transparent Materials Absorb Light
MOSCOW, Dec. 8, 2017 — Researchers have demonstrated an optical paradox — they have made a completely transparent material appear perfectly absorbing. The results of their research contradict the idea that materials that look transparent, such as glass, appear that...
Superabsorbing Method Improves Solar Cell Efficiency
RALEIGH, N.C., March 31, 2014 — A newly designed superabsorbing solar cell has the potential to significantly improve the light absorption efficiency of thin-film solar cells without compromising solar light absorption capabilities.
Elusive Solar Light-Trapping Limit Nearly Reached
DELFT, Netherlands, Feb. 27, 2014 — The theoretical limit of light-trapping in solar cells has eluded researchers for decades. But a group from Delft University of Technology (TU Delft) has come closer to it than anyone else. The researchers, members of TU Delft’s Photovoltaic...
Optical Nanocavity Boosts Light Absorption
BUFFALO, N.Y., SHANGHAI and SHENYANG, China, Feb. 27, 2014 — An optical nanocavity that boosts light absorption in ultrathin semiconductors could potentially improve solar cells and cameras, and maybe even harvest energy more efficiently. Currently in development by an international team from the University...
Nanowafer tunable for optimal light absorption
STANFORD, Calif. – A nanoengineered wafer that can be optimally tuned for light absorption is the thinnest, most efficient absorber of visible light to date, report engineers at Stanford University. “Achieving complete absorption of visible light with a minimal...
Nanowafer Tunable for Optimal Light Absorption
STANFORD, Calif., July 19, 2013 — A nanoengineered wafer that can be optimally tuned for light absorption is the thinnest, most efficient absorber of visible light to date, report engineers at Stanford University.
System simultaneously uses loss, gain
ERLANGEN, Germany – Light absorption or loss, usually seen as a disadvantage in optical metamaterials, actually can have useful applications. Physicists at Friedrich Alexander University Erlangen-Nuremberg borrowed a concept from quantum field theory in designing a new...
System Simultaneously Uses Loss, Gain
ERLANGEN, Germany, Aug. 10, 2012 — Light absorption (loss), usually seen as a disadvantage in optical metamaterials, has been shown to have useful applications.
Plasmonics Creates Invisible Photodetector
STANFORD, Calif., May 23, 2012 — An invisible light-detecting device that can see without being seen was created using plasmonic cloaking and could lead to a new class of devices that controls the flow of light at the nanoscale to produce both optical and electronic functions.
FDA Approves Brain Injury Detector
Apr 2, 2012 — A handheld device intended to aid in the detection of life-threatening bleeding in the skull has been approved by the FDA. The device, called the Infrascanner Model 1000, can help health care providers identify patients with critical head injuries...
FDA Approves Handheld Brain Injury Detector
WASHINGTON, Dec. 22, 2011 — The first handheld device intended to aid in the detection of life-threatening bleeding in the skull has been approved by the FDA. The device, called the Infrascanner Model 1000, can help health care providers identify patients with critical head...
Superblack Material Absorbs Multiwavelengths of Light
GREENBELT, Md., Nov. 11, 2011 — A thin layer of multiwalled carbon nanotubes constitutes a new superblack material that absorbs 99 percent of multiple wavelengths of light — an achievement that promises to open new frontiers in space technology. The nanotubes are positioned...
Red-light-emitting carbon nanotubes could brighten OLEDs
WARSAW, Poland – Carbon nanotubes with light-emitting chemicals attached glow with red light when exposed to ultraviolet wavelengths. Inducing carbon nanotubes to emit light is difficult, as they are excellent electrical conductors and capture energy from...
Light Absorption Boosted in Polymer Solar Cells
AMES, Iowa, Dec. 9, 2010 — Researchers from Iowa State University and the Ames Laboratory have developed a process capable of producing a thin and uniform light-absorbing layer on textured substrates that improves the efficiency of polymer solar cells by increasing light...
Image Sensors Made for Extreme Temps
DUISBURG, Germany, Sept. 23, 2010 — Car manufacturers are increasingly equipping their vehicles with image sensors to register the presence of pedestrians or vehicles in the blind spot or to detect obstacles when parking. The sensors must be able to function in extremely high...
Butterfly wings could lead to new optics
MADRID, Spain, and UNIVERSITY PARK, Pa. – New optical technologies are taking flight, thanks to a technique that can replicate butterfly wings. The manner in which these wings are formed, and their properties of luminosity, could help researchers develop light-emitting devices with enhanced...
Clinical Monitoring of AIDS Drugs
Aug 1, 2008 — Scientists from Erasmus Medical Centre in Rotterdam and from UMC in Nijmegen, both in the Netherlands, have joined forces with researchers from the Medical Research Council in Cambridge, UK, to develop an effective technique for measuring...
Understanding Smog by Measuring Light Absorption
Jun 1, 2008 — Haze lingering over cities may look fairly similar from place to place, but its composition can vary greatly. In some regions, industrial coal smoke predominates, whereas in others, automotive exhaust makes significant contributions. Researchers...
Which Way Out? Solar Cells That Trap Light
Feb 1, 2008 — Although the supply of sunlight is endless, the ability to effectively harness this vast power source remains limited. Most of the photons that hit low-cost thin-film solar cells simply bounce off, and their energy is never captured. In recent...
(25 results found)
April 2024
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