Possible economical laser creates breakthrough optical chip interconnects




Scientists from the University of Michigan have developed a polaritonlaser that works at room temperature and that can do its job than ordinary lasers. 250 times more efficient The finding may provide a breakthrough in optical interconnects for chips.

The laser researchers at University of Michigan and Intel have developed is a polaritonlaser . The light here is based on quasi-particles called polaritons. The polaritons form a condensate, similar to a Bose-Einstein condensate , in which coherent light is produced. Polaritonlasers have already demonstrated in 2003, but when the lasers were pumped using laser light. The researchers have now succeeded electrically pump the lasers with polaritonlasers very economical bleaching. Moreover, the researchers were able to work. The lasers at room temperature instead of super-chilled

The team of scientists succeeded for the first time to develop works on electricity and operates at room temperature. Polaritonlaser The laser produces polaritons through the use of electricity to generate. Samples of the semiconductor gallium arsenide in a resonant cavity The polaritons expire and thereby give up their energy to photons, which then escape from the cavity as a coherent, monochromatic beam of light.

In a demonstration, the team obtained an ultraviolet light beam of a millionth of a watt. The laser operates at a current of 169 amperes per square centimeter. A similar system on the basis of a typical laser would require 250 times as much. “Over the past 50 years, we have relied on lasers for creating coherent light and now we have something else based on a totally new principle,” said Pallab Bhattacharya, a professor at the University of Michigan, and he adds that the invention is not really a laser, as no emission of radiation is stimulated, but the distribution of polaritons.

Bhattacharya sees applications for the semiconductor industry. Optical interconnects can provide include fast, efficient communication between cores in multi cores. The research of the scientists last month published in Physical Review Letters and is now among other things described by IEEE Spectrum.

polariton laser schematics


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