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nanoantennas News
TiO2 Boosts Efficiency, Photoluminescene of White Laser Diodes
KYOTO, Japan, Jan. 10, 2023 — Light-scattering nano-elements, also known as nanoantennas due to their ability to harness light, are used as an optical control technology in nanophotonics. In combination with a phosphor plate, and upon irradiation, these 2D structures — in...
Stanford Scientists Trap and Redirect Light with Resonant Nanoantennas
STANFORD, Calif., Sept. 1, 2020 — Researchers in the lab of professor Jennifer Dionne at Stanford University have structured ultrathin silicon chips into nanoscale bars to resonantly trap light, and then release or redirect it later. “We’re essentially trying to trap...
Researchers Demonstrate VCSEL Control Using Ultrathin Metalenses
NICE, France, Feb. 12, 2020 — Researchers led by Patrice Genevet of the Centre de Recherche sur l’Hétéro-Epitaxie et ses Applications (CRHEA) at the University Côte d’Azur and collaborators at the Key Laboratory of Optoelectronics Technology at...
Researchers Synthesize Nanosize Semiconductors in a Plasmonic Nanoantenna
SAPPORO, Japan, Feb. 7, 2020 — Researchers at Hokkaido University have developed an approach to placing nanoscale semiconductors on metallic particles that is precise and cost-effective. Heat is localized on a gold nanoparticle within a butterfly-shaped nanostructure. The heat...
Photosensitizer Design Absorbs Low-Energy Light, Transfers Energy Efficiently
SAPPORO, Japan, Jan. 23, 2020 — Researchers at Hokkaido University, working with colleagues in Japan to develop a photosensitizer design that could use low-energy light effectively, developed a design that made the rare earth element europium (Eu) shine five times more brightly...
Conductive Polymer Could Enable Tunable Nano-Optics
LINKÖPING, Sweden, Dec. 10, 2019 — Optical nanoantennas, made from a conducting polymer instead of a traditional metal and developed by scientists at Linköping University, could enable a new type of controllable nano-optical component for use in various applications, such as...
New Nanodevice Generates 3× More Voltage than Classic Nanoantennas
SAN LUIS POTOSÍ, Mexico, May 9, 2019 — A nanodevice for harvesting solar energy, called an evolutive dipole nanoantenna (EDN), has demonstrated the ability to generate a thermoelectric voltage up to 3× larger than a classic dipole nanoantenna (CDN). The EDN could be used in applications...
All-Dielectric Nanoantennas Enable Study of Temperature-Mediated Effects
VLADIVOSTOK, Russia, April 3, 2019 — Scientists at Far Eastern Federal University (FEFU) have devised a method for efficiently mass-producing silicon-germanium (Si-Ge) fully alloyed nanoantennas. The electron-beam lithography traditionally used for production is expensive and...
Nanocrystal can Transform Light to Visible Spectrum
CANBERRA, Australia, Dec. 27, 2016 — A novel nanocrystal, 500 times smaller than a human hair, is capable of changing the intensity, shape and color of light. Developed by researchers at The Australian National University (ANU), the nanocrystal was built on glass so that light could...
Silicon Nanoantennas Turn Light Around
MOSCOW, Nov. 22, 2016 — Light is rather hard to control, as photons have neither mass nor electric charge. Devices such as nanoantennas can control the propagation of electromagnetic waves, but only to a certain degree. A proposed nonlinear optical nanoantenna that can be...
Fast Antenna-Assisted Switches Could Expand Potential for Optical Memory
SOUTHAMPTON, England, Nov. 15, 2016 — Fast optical switches developed using nanoantenna-assisted phase transition could open novel routes to the next generation of optoelectronics. The properties of nanoantennas were tuned to achieve low energy optical switching of a phase-change...
Laser Process Allows Precision Design of Nanospheres
HANNOVER, Germany, April 17, 2014 — A laser-based technique for creating light-scattering silicon nanospheres could have applications in medicine and sensor technology.
Nanoantennas improve infrared sensing
PHILADELPHIA – Nanoantennas with “slots” that correspond to mid-IR wavelengths are a new way to tune IR light into mechanical action – which could lead to more sensitive IR cameras and more compact chemical-analysis techniques. Existing IR...
Nanoantennas Improve Infrared Sensing
PHILADELPHIA, May 21, 2013 — Patterning nanoantennas with “slots” that correspond to wavelengths in the mid-IR has yielded a new way to tune IR light into mechanical action, paving the way for more sensitive IR cameras and more compact chemical-analysis techniques....
Phase-Shifted Flat Lens Creates Perfect Image
CAMBRIDGE, Mass., Aug. 24, 2012 — By moving the phase shifting of light to the surface of a lens instead of creating phase delays as it propagates through a material, Harvard engineers have created an ultrathin, flat lens that could potentially replace bulk components in optical...
Tunable Optical Filter Uses Nanoantennas
CAMBRIDGE, Mass., Feb. 27, 2012 — A new kind of tunable color filter that uses optical nanoantennas to obtain precise control of color output could be used to create invisible security tags to mark currency, and for display and biological imaging applications.
T-rays to Enable Tricorder?
LONDON, Jan. 25, 2012 — A new technique to create electromagnetic Terahertz waves (T-rays) — the technology used for full-body security scanners — could one day lead to the development of a Star Trek ‘tricorder’-inspired handheld scanner suitable for better medical...
Optical Nanoantennas Enable Multipurpose Particle Manipulation
URBANA, Ill., Jan. 16, 2012 — By tuning the properties of laser light illuminating arrays of metal nanoantennas, researchers have shown that these nanoscale structures enable dexterous optical tweezing and size-sorting of particles. In work conducted at the University of...
Research at the Nanoscale Boosts Green Photonics
Dec 1, 2011 — Improving the efficiency of thin-film solar cells is a key challenge, and some believe that nanophotonics could be the answer. Nanophotonic structures give us better control over light, enabling us to manipulate it in ways never seen before...
Simple nanoantenna separates colors of light
GOTHENBURG, Sweden — A new nanoantenna directs red and blue colors in opposite directions and could lead to optical nanosensors that can detect very low concentrations of gases or biomolecules. Historically, a structure that is smaller than the wavelength of...
New Nanomaterials Control, Direct Light Energy
TORONTO, Canada, July 18, 2011 — Inspired by photosynthesis, researchers have engineered a new generation of nanomaterials that control and direct the energy absorbed from light. "Nanotechnologists have for many years been captivated by quantum dots — particles of...
Nanoantennas Used to Study Nonlinear Optical Effects
STUTTGART, Germany, June 6, 2011 — For the first time, researchers are using nanoantennas to focus laser light on oscillating nanoparticles to investigate ultrafast nonlinear optical effects. When a short laser pulse is focused on nanoparticles, they heat up very briefly and...
Nanoantennas Hold Promise for IR Photovoltaics
HOUSTON, May 11, 2011 — A new device that can act as an optical antenna by collecting and focusing light, and as a photodiode by converting light into a current of electrons, has been developed by Rice University researchers. This nanoscale device, dubbed nanoantenna, has...
The Teacher
Oct 1, 2009 — After earning a PhD at Caltech, Nader Engheta spent four years at Kaman Sciences Corp. before joining the faculty at the University of Pennsylvania in Philadelphia, where he is now the H. Nedwill Ramsey Professor of Electrical and Systems...
(24 results found)
April 2024
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