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Nano News
Nanophotonics with Surface Plasmons -- Part I
Jan 1, 2006 — In this first of two articles on optical technologies that manipulate photons at the nanoscale, we discuss how surface plasmons are analogous to photons and how they may be used to efficiently guide and control electromagnetic radiation. In at least some cases, surface plasmons enable dramatic improvements in the performance of conventional photonic components such as modulators and switches.Nanotechnology may be loosely defined as a branch of engineering that deals with things that are smaller...
Unipolar Nanotube Devices Emit in the Near-IR
Jan 1, 2006 — Scientists at IBM’s Thomas J. Watson Research Center in Yorktown Heights, N.Y., and at Duke University in Durham, N.C., have fabricated field-effect transistors based on partially suspended carbon nanotubes that generate near-infrared radiation. The...
Nanosheets Might Make Microlasers
Dec 1, 2005 — Researchers at the University of California, Davis, have created planar clusters of CdSe nanocrystals that emit polarized light in the plane of the cluster. The discovery could lead to nanostructures that emit light, such as lasers and LEDs; absorb...
Photoluminescence/Raman System Images Nanotubes
Dec 1, 2005 — Using a setup that enables simultaneous high-resolution photoluminescence and Raman imaging, scientists at Universität Tübingen in Germany and at the University of Rochester in New York are probing single-walled carbon nanotubes. Coupled with the...
‘Nano3 Photonics’ Demonstrated with Single Gallium Nanoparticle
Nov 1, 2005 — Photonic devices are coming in smaller and smaller packages, giving rise to a demand for nanoscale components. To that end, investigators at the University of Southampton in the UK are working on an approach to be used in nanoscale nonlinear optical...
Femtosecond Laser Used for ZnO Nanowire Synthesis
Nov 1, 2005 — A laser-assisted nanowire growth process reported by scientists at Lawrence Berkeley National Laboratory in Berkeley, Calif., employs a high-power femtosecond source to reduce the formation of microparticulates in the synthesis of crystalline ZnO...
Heat-Transfer Fluids Cut Cost of Quantum Dots
Nov 1, 2005 — Quantum dots may be tiny, but they are hugely important for their optoelectronic properties. A drawback, however, is that they typically cost thousands of dollars per gram. Approximately 90 percent of the expense of quantum dots lies in the cost...
Nanoscale Belts Have Display Applications
Nov 1, 2005 — 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...
Power Accessories
Nov 1, 2005 — For many, the cell phone has become as much a fashion statement as a communication device, and there is a large market for decorative covers and carrying cases. But the truly techie fashionista might get a bigger charge out of new accessories that...
Rapid Quantum Dot Synthesis Suggests Biomedical, Optoelectronic Uses
Nov 1, 2005 — 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...
Summit to Explore Nanotech Apps
Oct 18, 2005 — ALEXANDRIA, Va., Oct. 18 -- The Nano Science and Technology Institute (NSTI) of Cambridge, Mass., which has a mission to promote nano- and other advanced technologies, is presenting a one-day summit tomorrow of businesses demonstrating how...
InAs Quantum Dots Self-Organize on Microdisks
Oct 1, 2005 — 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...
Patterned Metal Films Focus Surface Plasmon Polaritons
Oct 1, 2005 — 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...
Quantum-Dot Films Display Strong Photoluminescence
Oct 1, 2005 — 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...
Blue Electroluminescence from a Single Polymer Layer
Sep 1, 2005 — 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...
Organic Dye Molecules Form Waveguides
Sep 1, 2005 — 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...
Laser Enables Resolution of Nanomagnet Flipping
Aug 1, 2005 — 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...
Optically Active Quantum Dots Embedded in Nanowires
Aug 1, 2005 — 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...
Excimer Laser Produces Nanobump Arrays
Jul 1, 2005 — 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...
Optical Conveyor Belt Transports Submicron Objects
Jul 1, 2005 — 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...
Painting Nanowires Yields High-Speed Circuits
Jul 1, 2005 — 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...
Femtosecond Laser Prints Biomolecules
Jun 1, 2005 — 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...
Nanophotonics Heads into the Third Dimension
Jun 1, 2005 — 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...
Near-IR Microscopy Images Nanotubes
Jun 1, 2005 — 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...
UK University Secures Funding
May 1, 2005 — Two teams at the University of Southampton in the UK have received five-year research awards under the Portfolio Partnership initiative, which also is providing funding to four other UK groups. The Portfolio Partnership in Photonics, valued at $13.5...
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May 2024
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