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First Nonpolar Blue-Violet Nitride Laser Diodes Were Reported by Rohm and UCSB

Last week¡¦s 7th International Congress of Nitride Semiconductors (ICNS-7) in Las Vegas, NV, USA saw reports of the latest progress in nonpolar laser diodes from the likes of University of California Santa Barbara and Japan¡¦s Rohm Co Ltd.

13 Oct 2007

Blue LED Offers Stronger Light Emission

Optical components could benefit from a blue LED which offers enhanced coupling efficiency, stronger light emission, and a more uniform optical power output.

12 Oct 2007

Researchers Discovered Way to Predict Behavior of Unruly Light Waves During Nanoscale Radiation Heat Transfer

Nanoscale devices present a unique challenge to any optical technology ¡X there¡¦s just not enough room for light to travel in a straight line.

9 Oct 2007

Highly Efficient QCL Could Provide Compact and Portable Source of Mid-Infrared Radiation

A highly efficient quantum cascade laser (QCL) that operates continuous wave (CW) at room temperature could provide a compact, portable and cost-efficient source of mid-infrared radiation, say researchers in the US. Their QCL emits at 4.5 microns, has a wall plug efficiency of over 9.3% and a CW output power of 675mW. Wall plug efficiencies greater than 18% are also reported for devices at a temperature of 150K, with CW output powers of more than 1W.

4 Oct 2007

Scientists Discovered Ways to Make QDs Brighter

U.S. scientists have developed a method of increasing the fluorescence intensity of quantum dots by a factor of at least 108.

2 Oct 2007

World's Brightest Quantum Dots have Many Potential Applications

By placing quantum dots on a specially designed photonic
crystal, researchers at the University of Illinois have
demonstrated enhanced fluorescence intensity by a factor of up to 10⁸.
Potential applications include high-brightness light-emitting diodes,
optical switches and personalized, high-sensitivity biosensors.

26 Sep 2007

New tunable Mirrorless Optical Parametric Oscillator - Tunable and Mirrorfree Infrared Source

The first mirrorless optical parametric oscillator (MOPO) has been unveiled by researchers in Sweden. The simplicity of the device with its ability to tune with high precision in the near- and mid-infrared makes the MOPO an interesting option for a number of applications.

24 Sep 2007

Alternative to Conventional Lighting - Efficient and Environmentally Friendly White Organic LED

Researchers in Hong Kong claim to have developed the highest power efficiency non-doped white organic light emitting device (WOLED) made using a single white-emitting material. They believe that their high purity, color stable device, surpasses existing WOLEDs and is a more efficient and environmentally friendly alternative to inorganic LEDs.

24 Sep 2007

Radio Waves Offers New Possibility into Smaller and Simpler Equipment

Visible and ultraviolet laser light has been used for years to cool trapped atoms--and more recently larger objects--by reducing the extent of their thermal motion.

20 Sep 2007

Molecular Positronium - Next Generation Gamma-Ray Laser

Physicists at UC Riverside have created molecular positronium, an entirely new object in the laboratory. Briefly stable, each molecule is made up of a pair of electrons and a pair of their antiparticles, called positrons.

15 Sep 2007