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US Army Research Office News
Optics, Chemistry, Materials Sciences Use Light to Manipulate Light
PITTSBURGH, Feb. 26, 2020 — Researchers from the University of Pittsburgh’s Swanson School of Engineering, Harvard University, and McMaster University have revealed a hydrogel that can respond to optical stimuli and modify the stimuli in response. A convergence of...
Hyperbolic Metamaterials Advance Practical Applications
WEST LAFAYETTE, Ind., May 14, 2014 — Optical imaging of objects as small as DNA strands could be possible using hyperbolic metamaterials. The ultrathin crystalline films act like metals when light passes through in one direction and like dielectrics when light passes in a perpendicular...
GRIN Plasmonics: A Path to Superfast Computing
BERKELEY, Calif., Jan. 27, 2011 — A team of researchers with the US Department of Energy (DOE)’s Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of California, Berkeley, have carried out the first experimental demonstration of GRIN – for gradient...
‘Plasmonic Metamaterials’ May Advance Optical Cloaking
WEST LAFAYETTE, Ind., Jan. 25, 2011 — Researchers are developing a new class of "plasmonic metamaterials" as potential building blocks for advanced optical technologies, including ultrapowerful microscopes and computers, improved solar cells, and a possible invisibility cloak. The...
3-D interior modeling: A virtual walk on the inside
BERKELEY, Calif. – A laser-equipped backpack worn by a human operator has provided 3-D modeling of interior sections of a campus building at the University of California, enabling a virtual walk through the academic halls. Automated 3-D modeling of building interiors...
Short, Powerful On-chip Light Pulses Generated
SAN DIEGO, Dec. 1, 2010 — Electrical engineers generated short, powerful light pulses on a chip — an important step toward the optical interconnects that will likely replace the copper wires that carry information between chips within today's computers. University of...
Transistor laser breaks the law
CHAMPAIGN, Ill. – A three-port quantum well transistor laser developed by Milton Feng and Nick Holonyak Jr. at the University of Illinois at Urbana-Champaign is rewriting a major current law. Thanks to this device, the behavior of photons, electrons and...
Transformation Optics Makes a U-turn
BERKELEY, Calif., July 7, 2010 — In transformation optics, light waves can be controlled at all lengths of scale through the unique structuring of metamaterials, composites typically made from metals and dielectrics — insulators that become polarized in the presence of an...
New Alloys Promise Better PV Cells, LEDs
TEMPE, Ariz., March 25, 2010 — A recent advance by Arizona State University researchers in developing nanowires could lead to more efficient photovoltaic cells for generating energy from sunlight and to better LEDs. Electrical engineers Cun-Zheng Ning and Alian Pan are...
'Spaser' Nanolaser Realized
WEST LAFAYETTE, Ind., Aug. 17, 2009 – By harnessing clouds of electrons called surface plasmons instead of photons, engineers at Purdue University overcame a barrier preventing lasers from being integrated into electronic circuits. Their nanolaser, the "spaser," is the first of its kind...
4.3 GHz Record Set With LET
CHAMPAIGN, Ill., June 17, 2009 – Researchers constructed a light-emitting transistor that has set a new record with a signal-processing modulation speed of 4.3 gigahertz, breaking the previous record of 1.7 gigahertz held by a light-emitting diode.
Swept Under the Carpet Cloak
BERKELEY, Calif., May 4, 2009 – A team at UC Berkeley’s Nano-scale Science and Engineering Center created an "invisibility carpet cloak" from nanostructured silicon that conceals objects from optical detection. While the carpet itself can still be seen, the bulge of the...
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April 2024
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