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Tuesday 22nd August 2006
Quintessence Photonics has written gratings into its infrared laser diodes that narrow the emission spectra and reduce temperature sensitivity. This will lead to cheaper diode-pumped laser systems, and make the devices more attractive for medical imaging and Raman spectroscopy, says Paul Rudy.
Monday 24th July 2006
With some major developments at Cree, RF Micro Devices and Nitronex, there's no doubting where the push to commercialize GaN-based RF devices is coming from.
Monday 24th July 2006
Photonic integration was one of the hot new ideas that emerged during the telecoms boom, but it was subsequently shelved by cash-strapped component vendors. Now, as Roy Rubenstein reports, the technology could be set to make a big revival.
Monday 24th July 2006
GaN HFET reliability can be improved by adding field plates to the structures. This is believed to reduce carrier trapping at the surface, but simulations by Ric Borges, Nelson Braga, Bo Wu and Vidas Mickevicius of Synopsys show that it also decreases the electron temperature and bulk trapping throughout the device.
Monday 24th July 2006
Researchers are turning to alternative capping layers and GaN and non-polar sapphire substrates to push the output power of LEDs to levels suitable for everyday lighting. Richard Stevenson reports.
Monday 24th July 2006
Fujitsu's GaN program has led to proven device reliability, a fabrication process using low-cost conducting 3 inch SiC substrates, and record output power from MIS-HEMTs, says Toshihide Kikkawa.
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Tuesday 27th June 2006
Based in Woburn, MA, Skyworks Solutions plans a dramatic increase in its share of the power-amplifier market and is targeting both high-end and ultra-low-cost applications. Michael Hatcher asks Kevin Barber how the company will be able to meet the manufacturing demands.
Tuesday 27th June 2006
The value of nearly all publicly-owned compound semiconductor companies across the globe has raced upwards over the past year. But, asks Michael Hatcher, which stock outperformed the rest with a seven-fold increase in just 12 months?
Tuesday 27th June 2006
Want to start up a new company, but worried about taking on financing from venture capitalists? Felix Ejeckam from GaN-on-diamond specialist Group4 Labs offers some words of advice.
Tuesday 27th June 2006
Atomic force microscopy is the standard technique for determining semiconductor surface roughnesses. But there is an easier-to-use alternative, white-light interferometry, which can deliver the same height resolution while imaging larger areas at far faster rates, argues IQE's Roy Blunt.
Tuesday 27th June 2006
Nichia has developed ultraviolet, blue and aquamarine high-power laser diodes that offer compact replacements for mercury lamps and argon-ion lasers and have the same structure as its 405 nm emitters. Richard Stevenson reports.
Tuesday 27th June 2006
The most upbeat mood in years was in evidence at this year's CS Mantech, with delegates as well as exhibitors feeling the benefits of surging sales of the latest phones. Richard Stevenson reports.
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Tuesday 27th June 2006
Arrays of filter-free AlGaN-on-sapphire detectors that are unaffected by sunlight and deliver high sensitivity, high operability and excellent uniformity could be used in all sorts of commercial and military applications, say Marion Reine, Philip Lamarre and Allen Hairston from BAE Systems.
Tuesday 27th June 2006
The availability of 2 inch aluminum nitride substrates and the development of an LED that is based on doped epilayers of the same material marks the dawn of a new era in III-N technology, writes Michael Hatcher.
Wednesday 24th May 2006
Despite improving markets, massive chip vendor consolidation is imminent - and vital to sustain innovation, says Bookham's Giorgio Anania.
Wednesday 24th May 2006
The merger between telecom system giants Lucent Technologies and Alcatel will affect the supply chain all the way down to the III-V component level and play into the hands of broad-based suppliers, as Michael Hatcher reports.
Wednesday 24th May 2006
Fiber laser specialist and semiconductor fab owner IPG Photonics is building a second chip facility as demand for its high-power systems hots up.
Wednesday 24th May 2006
Infinera's Jagdeep Singh tells Richard Stevenson how his digital vision has beaten the skeptics and is revolutionizing optical networks.
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Wednesday 24th May 2006
Infineon's new second-generation SiC diodes combine the established advantages of the Schottky structure with the better high-voltage characteristics and surge-current handling of a p-n junction. The result is a more rugged product that is better suited to medium- and high-power applications, say Kerstin Hubel and Markus Hallenberger.
Wednesday 24th May 2006
LED performance could be improved by switching production to GaN substrates, which reduces dislocation densities. However, a better solution is to combine HVPE and MOVPE into a single process, says researcher Glenn Solomon.
Wednesday 24th May 2006
nLight is aggressively targeting medical applications, displays, eye-safe communication and atmospheric sensing by extending the wavelength range of its high-power diode bars. Richard Stevenson reports on 660 nm and 1.9 µm emitters that feature record output powers.
Thursday 20th April 2006
Wafer-level integration of InGaP HBT and PHEMT structures is at the heart of Anadigics' strategy to return to profitability, hears Michael Hatcher.
Thursday 20th April 2006
Massive trading volumes and a rapid upturn in the valuations of Finisar and Avanex coincided with the year's biggest fiber-optic components show.
Thursday 20th April 2006
Dealing with a legacy of material quality problems, management issues and a plunge in market share doesn't sound like most people's idea of fun, but that didn't stop Phil Yin taking over the reins at substrate supplier AXT

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