Mar. 29, 2012

Electron-hole Recollision: Creating Light at Many Frequencies

By aiming high- and low-frequency laser beams at a semiconductor, researchers at UC Santa Barbara caused electrons to be ripped from their cores, accelerated, and then smashed back into the cores they left behind. This recollision produced multiple frequencies of light simultaneously. Their findings appear in the current issue of Nature.
moreAug. 15, 2011

Two-Dimensional Nanoscopy: Measuring Electron Oscillations

Researchers from Bielefeld, Kaiserslautern and Würzburg have developed a novel high-tech microscope: It magnifies objects a million times and shows movements with a retardation of one million billion times. The results were published in Science.

The new technology allows tracking extremely fast processes in miniature objects - with an unparalleled spatial and temporal resolution. moreApr. 18, 2011

Focussed Electron Beam Induced Processing: Improving VCSE Lasers

The vertical cavity surface emitting laser (VCSEL) is a semiconductor laser which is often used in data transmission for short-distance links like Gigabit Ethernet. These lasers are very popular in telecommunications because they consume little energy and can be simply fabricated in volumes of many tens of thousands on a single wafer. moreFeb. 11, 2011

Growing Nanolasers on Silicon

Growing Nanolasers on Silicon: Engineers at the University of California, Berkeley, have found a way to grow nanolasers directly onto a silicon surface, an achievement that could lead to a new class of faster, more efficient microprocessors, as well as to powerful biochemical sensors that use optoelectronic chips. They describe their work in a paper published Feb. 6 in the online issue of the journal Nature Photonics.
moreDec. 14, 2010

A Permanently Aligned Combination of Any 2 Wavelengths

The Cobolt Dual Combiner by Cobolt AB is a unit which offers any combination of two 04-01 Cobolt model lasers at any power level in a permanently aligned package. The extreme robustness of Cobolt's laser and proprietary HTCure manufacturing technology allows Cobolt to offer the Dual Combiner with excellent beam overlap and beam pointing stability. moreMar. 09, 2010

Tunable Diode Lasers

Grating stabilized diode lasers in Toptica's proprietary pro technology can now be equipped with laser diodes from 370 nm to 1770 nm. The TA pro, a master oscillator power amplifier system, provides up to 1.5W output. Frequency converted lasers offer UV, green or yellow light, e.g. at 589 nm with 20W (Guide Star) or 2W (Na laser cooling). Other recent developments include fiber amplified tunable diode lasers, cw lasers at 190 nm, and high speed locking electronics for linewidth narrowing below 1 Hz. moreOct. 19, 2009

T-rays for Medical and Security Imaging

Nanostructures based on semiconductors with special properties have been developed by Hebrew University of Jerusalem physicists with future applications for security cameras and spectrometers and medical imaging.
Prof. Leonid Shvartsman and Prof. Boris Laikhtman of the university's Racah
Institute of Physics have invented a novel design of TeraHertz-ray (T-ray) lasers. They said the novel device will have 400 times higher "gain" (a measure of power) than that of the only coherent T-ray sources existing today, called THz quantum cascade lasers. more