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Research & Technology News
MagiQ Readies Quantum Code System
Jan 1, 2003 — MagiQ Technologies Inc. of New York has announced plans for the commercial release of its Navajo quantum cryptography product. The quantum key distribution system will transmit entangled photons over fiber optics, enabling users to create secure code keys. Target sectors include financial institutions, the government and the military. The company has received approximately $7 million in seed funding to prepare for the product launch and to assist in the further acquisition of intellectual...
Models Suggest Integrated Photonic Circuits
Jan 1, 2003 — A group of researchers at the University of Alabama in Huntsville has reported in the Nov. 18 Optics Express that integrating conventional waveguides and photonic crystal structures can produce compact integrated photonic circuits. To illustrate the...
Motion Sensors Compensate for Image Blurring
Jan 1, 2003 — Using integrated accelerometers to detect the vibration in an imaging system, suggest researchers at Ben-Gurion University of the Negev in Beersheba, Israel, offers an accurate means to correct for displacement and blur. In a report of the technique...
Nd:YVO4 Laser Offers 200 kHz
Jan 1, 2003 — Advanced Optical Technology Ltd. of Basildon, UK, has reported the development of a 200-kHz electro-optically Q-switched laser. Such high-repetition-rate devices may find use in industrial, medical and telecommunications applications. Sharing in the...
Networked Computers Support Data-Intensive Applications
Jan 1, 2003 — Massive amounts of data from multiple storage sites connected by optical networks can be interactively visualized, analyzed and correlated with the OptIPuter, a distributed computer under development in a project headed by the California Institute...
New Liquid Crystal Opens Optical Applications
Jan 1, 2003 — A group at the University of Central Florida in Orlando has developed a type of polymer-dispersed liquid crystal that offers a gradient droplet size distribution. The gradient refractive index profile can act as switchable prism gratings, as well as...
New Materials Enable Dense Data Storage
Jan 1, 2003 — A team at Boston College in Chestnut Hill, Mass., and Massachusetts Institute of Technology in Cambridge has discovered a class of materials that may offer an efficient and robust method of ultradense data storage based on multiphoton absorption....
Optical Technique Probes MEMS Performance
Jan 1, 2003 — A new excitation/detection method based on light pressure and interferometric profiling can characterize a microelectromechanical systems (MEMS) gimballed mirror array. Besides enabling accurate, noninvasive process monitoring, the all-optical...
Plastic Electro-Optic Modulators Show Potential
Jan 1, 2003 — Although the need for modulation at terahertz rates for telecommunications may be years away, researchers at Lucent Technologies' Bell Labs in Murray Hill, N.J., are working on plastic electro-optic modulators to do just that. Recently, Mark Lee and...
Quantum Dots, Photonic Crystal Form LED
Jan 1, 2003 — Scientists at the University of Michigan in Ann Arbor have reported an electrically driven LED comprising InAs/GaAs quantum dots in a GaAs photonic crystal structure. They described the fabrication and operation of the 1.04-µm emitter in the Nov. 11...
Reflectivity Yields Fresnel Lenses
Jan 1, 2003 — Continuing their work with photoinduced reflectivity, scientists at W.W. Hansen Experimental Physics Laboratory at Stanford University in California have produced transient diffractive optical elements in semiconductor wafers by optical stimulation....
Satellite Images Plankton Bloom
Jan 1, 2003 — Images from the Envisat satellite released by the European Space Agency displayed a 300 x 200-km phytoplankton bloom in the seas off Nova Scotia and Newfoundland in Canada from July 24 to Aug. 13, 2002. Although such blooms are not uncommon, they...
Seaborne Reactors May Affect Neutrino Experiments
Jan 1, 2003 — Physicists at Stanford University in California suggest in the Nov. 4 Physical Review Letters that the neutrinos produced by nuclear reactors on naval vessels may interfere with neutrino oscillation research. They note, however, that Russian nuclear...
Semiconducting Wires Improve Polymer LEDs
Jan 1, 2003 — European researchers have performed a balancing act that may lead to inexpensive and large-scale illumination, low-power and expansive flat panel displays, and other applications of polymer light-emitting devices. Traditionally, polymer LED design...
Spectra Identify Nanotube Species
Jan 1, 2003 — Chemists at Rice University in Houston have reported that spectrofluorometry is an effective tool in identifying various species of single-walled carbon nanotubes. They suggest that the technique may be used to guide the selective production of...
Spectroscopy Probes Fuel Flames
Jan 1, 2003 — Rogier Evertsen of the University of Nijmegen in the Netherlands has demonstrated the suitability of cavity ringdown spectroscopy for the analysis of the combustion products of fuel flames. In a report of the work that appeared as his doctoral...
Tristable Nematic Liquid Crystals Formed
Jan 1, 2003 — Liquid crystal devices with molecules that adopt multiple stable orientations could someday help reduce power consumption of high-information-content displays. In line with this, researchers at Japan Science and Technology Corp. and the Japanese...
UV and Etching Treatment Improves Amorphous Silicon
Jan 1, 2003 — Illuminating hydrogenated amorphous silicon with ultraviolet radiation and etching it with a sodium-hydroxide solution reduces subsequent light-induced degradation of its photosensitivity, report researchers from the National Renewable Energy...
X-Ray Laser Funding Approved
Jan 1, 2003 — A group of researchers at Stanford Linear Accelerator Center in Menlo Park, Calif., are looking forward to seeing the world in a new light with the Linac Coherent Light Source. The x-ray free-electron laser is a step closer to reality with the...
Atomic Gas Is a Nearly Perfect Photon Counter
Dec 1, 2002 — Although proposed linear quantum computation schemes show promise, they are premised on photon counters with efficiencies greater than 99 percent -- beyond the reach of today's best devices. Ataç Imamoglu of the University of California, Santa...
Attosecond Spectroscopy Probes Atomic Cores
Dec 1, 2002 — It is possible to infer the lifetime of core holes by looking at the energy spectral width of the photons or electrons that are emitted following excitation of an atom, but until recently, physicists had been unable to observe the reorganization...
Cascaded Ferroelectrics Steer Light
Dec 1, 2002 — The ability to electro-optically modulate the refractive index in ferroelectric materials promises to enable the development of ultrafast switches and scanners, but heretofore the scanning angles they offer have been limited. Now researchers at...
CCDs Monitor Laser Damage
Dec 1, 2002 — At the University of California, Riverside, and Lawrence Livermore National Laboratory in Livermore, Calif., scientists have imaged in near-real time the damage to deuterated KDP caused by 68- to 80-J/cm2 pulses from a Q-switched Nd:YAG. They...
Conjugated Polymer Exhibits Phosphorescence
Dec 1, 2002 — Conjugated polymers are a class of materials that hold promise as a basis for electro-optical applications, but that promise has been blunted by the fact that electrical injection creates a substantial proportion of long-lived dark states. Now...
Crystal Shapes Optical Pulses
Dec 1, 2002 — Reporting in the Oct. 7 issue of Optics Express, a research team at Montana State University in Bozeman describes how it has shaped laser pulses using optical coherent transient processes in a Tm:YAG crystal. The technique has potential to enable...
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