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New Nanometer Laser


Prof. ZOU Bingsuo at Hunan University Micro-Nanotechnology Research Center, in collaboration with NING Cunzheng of Arizona State University Institute of NanoElectronics, has demonstrated the new world record peak wavelength changes continuously from 500 to 700 nm by expanding the tuning range of the laser chip. As a major breakthrough over the past ranges up to several dozen nanometers, the finding was published in the recent issue of Nano Letters.

The study team headed by Prof. ZOU worked out expandable nanowires using 1-D nanostructure growing technique, trying to avoid the match problems of different materials. In collaboration with the research team led by NING, they developed a spatially continuously tunable laser (for green, yellow, orange, and red light) with a superbroad wavelength tuning range, unmatched by any other available semiconductor-based technology.

The new materials derived from the said technology can find wide applications in the area of new illumination sources, optic communication, molecular and biological sensors, and solar cells. For example, it can produce a much higher luminance and save more energy, if made into a light device to replace incandescent light bulbs. It can greatly improve the performance of optic components for optic communication. One can develop self-illuminating sensors using the materials to enhance the efficiency and sensitivity of molecular and biological tests. The new laser device can also be used to improve the existing spectrum technology. The material produced from the technology is also a booster to the photoelectricity conversion rate, if applied to solar cells.

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