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Source/Type: Compound Semiconductors Online Reported News Scientists Demonstrate Room-Temperature Continuous
Nanolaser
June 20, 2007... Scientists at Yokohama National University in Japan have successfully built and demonstrated a nanoscale room temperature laser that produces stable, continuous streams of near infrared light. The researchers are presenting their nanolaser in the latest issue of Optics Express, an open access journal from the Optical Society of America. The overall device measures several microns (millionths of a meter) in width. The portion of the device that actually produces laser light is very much nanoscale in all directions, according to Optics Express. The laser is made from gallium indium arsenide phosphate (GaInAsP). The design employed a design for a photonic crystal laser that was first developed and demonstrated at the California Institute of Technology in 1999. In this design, researchers drill a repeating a pattern of holes (also known as a photonic crystal) through the material. Then they introduce one irregularity in the pattern. The pattern of holes and the irregularity together prevent light waves of most colors (frequencies) from existing in the structure, with the exception of a small band of frequencies that can exist in the region near the defect. The researchers are the first to make such a laser which can operate continuously at room temperature. Optics Express News Release Return to Search
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