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Nano Features
Nanoscale Belts Have Display Applications
Researchers at National Taiwan University and at Academia Sinica, both in Taipei, have come up with the latest nanofashion accessory: a nanobelt. Built of CdSe, it is strongly photoluminescent, has a high quantum yield and efficiently converts...
Photonics Spectra, November 2005
Rapid Quantum Dot Synthesis Suggests Biomedical, Optoelectronic Uses
Scientists at State University of New York at Buffalo have developed rapid, single-pot methods for the chemical synthesis of InP and PbSe quantum dots. The work promises to have an effect on the production and application of quantum dots for...
Photonics Spectra, November 2005
InAs Quantum Dots Self-Organize on Microdisks
A self-organization process identified by scientists at Stanford University’s Solid State and Photonics Laboratory in California promises to facilitate the fabrication of devices in which quantum dots are coupled with microcavities, such as for...
Photonics Spectra, October 2005
Patterned Metal Films Focus Surface Plasmon Polaritons
A team of investigators at the University of California, Berkeley, has demonstrated that circles and ellipses milled in silver films can focus surface plasmon polaritons. The development may enable the creation of ultrasmall integrated...
Photonics Spectra, October 2005
Quantum-Dot Films Display Strong Photoluminescence
A sol-gel fabrication technique developed at the National Institute of Advanced Industrial Science and Technology in Ikeda, Japan, yields thin films of quantum dots that exhibit photoluminescent efficiencies comparable to that of semiconductor...
Photonics Spectra, October 2005
Blue Electroluminescence from a Single Polymer Layer
Interest in organic LEDs is largely due to their potential for cost-effective device fabrication. Research conducted at Massachusetts Institute of Technology in Cambridge is helping to streamline the process by demonstrating stable blue...
Photonics Spectra, September 2005
Organic Dye Molecules Form Waveguides
Scientists at Japan’s National Institute for Materials Science in Tsukuba have reported the synthesis of single-mode waveguides by the self-assembly of organic dye molecules in solution. Waveguides produced from a thiacyanine dye transmit 520- to...
Photonics Spectra, September 2005
Laser Enables Resolution of Nanomagnet Flipping
At the University of California, Santa Cruz, researchers have demonstrated an optical method to watch nanomagnets flip. Optically tracking changes in the magnetization of the nanostructures could pay off in various ways, explained assistant...
Photonics Spectra, August 2005
Optically Active Quantum Dots Embedded in Nanowires
Investigators at the Swiss Federal Institute of Technology in Zurich have reported the fabrication of quantum dots in nanowires that display a level of brightness an order of magnitude higher than self-assembled InAs dots. They suggest that the work...
Photonics Spectra, August 2005
Excimer Laser Produces Nanobump Arrays
Two-dimensional arrays of 260-nm-diameter silicon bumps have been fabricated by exposing 1-μm-diameter polystyrene beads on silicon wafers to ultraviolet radiation from a KrF laser. Researchers at East China Normal University in Shanghai and at...
Photonics Spectra, July 2005
Optical Conveyor Belt Transports Submicron Objects
Investigators at the Academy of Sciences of the Czech Republic in Brno and at the University of St. Andrews in the UK have used a sliding standing wave formed by counterpropagating Bessel beams to trap and move series of tiny polystyrene beads. The...
Photonics Spectra, July 2005
Painting Nanowires Yields High-Speed Circuits
The production of circuits and processors from silicon substrates is expensive, and the required high-temperature fabrication process is not always compatible with a variety of materials. Researchers at Harvard University in Cambridge, Mass., have...
Photonics Spectra, July 2005
Femtosecond Laser Prints Biomolecules
Dense, high-resolution patterns of various biological molecules have been fabricated using direct laser printing with a source of 500-fs ultraviolet pulses. Demonstrated at the Foundation for Research and Technology — Hellas’ Institute of Electronic...
Photonics Spectra, June 2005
Nanophotonics Heads into the Third Dimension
Scientists at the University of California, Los Angeles, have demonstrated a way to exploit the third dimension to create tiny optical components. Going vertical should enable the fabrication of densely integrated optical structures and offer...
Photonics Spectra, June 2005
Near-IR Microscopy Images Nanotubes
A team of scientists at Rice University in Houston has reported that near-infrared fluorescence microscopy is suitable for the study of single-walled carbon nanotubes. Basic research into these structures, as well as the development of superior...
Photonics Spectra, June 2005
All IR Cameras Are Not Created Equal
As media saturation spreads in the Western world, it is almost impossible to go anywhere without seeing some kind of a camera. This increase in camera use is highly evident in the infrared and night-vision market. However, it is important to note...
Photonics Spectra, February 2004
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