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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

Optics and Photonics Plays an Important Role in Nano and Solar Technology

"Optics + Photonics is proceeding on the right track with its emphasis on nano and solar technologies, which are immensely important to our future," said Akhlesh Lakhtakia, Charles Godfrey Binder professor of engineering science and mechanics at Pennsylvania State University and editor-in-chief of SPIE's Journal of Nanophotonics. Lakhtakia continued, "But this emphasis on the nano and solar future has its feet firmly planted in the past glories and ongoing research in optics and photonics, a foundation from which all future technologies emerge."

13 Sep 2007

Longer Carbon Nanotubes Absorb Light Better

If you want to exploit the ability of single-walled carbon nanotubes (SWCNTs) to absorb, fluoresce and scatter light, take the advice of a sandlot quarterback and “go long

5 Sep 2007

Quantum Dots to form Next Generation Solid State Lighting

American Elements announced today the formation of a new product group to manage the production, sales and marketing of its quantum dot nanopowder production facilities. The new division was spun off from the Nanometals™ Group and will operate under the tradename AE Quantum Dots.

4 Sep 2007