The ink was hardly dry on his new contract as assistant professor of electrical and computer engineering at Lehigh, when Nelson Tansu announced a breakthrough in his research into high-performance lasers.
In two recent issues of Applied Physics Letters (APL) - on July 7 and Sept. 29, Tansu and other collaborating researchers reported the best threshold values to date for near-infrared-range (with an emission wavelength of 1300-nm), indium-gallium-arsenide-nitride (InGaAsN) lasers emitting from a quantum well.
Tansus group also achieved the best threshold values yet for near-infrared-range quantum-well (QW) lasers operating under continuous-wave conditions at temperatures up to 100 degrees C.
Kurt Pfitzer | Lehigh University
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Planet Earth experienced a global climate shift in the late 1980s on an unprecedented scale, fuelled by anthropogenic warming and a volcanic eruption, according to new research published this week.
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In laser material processing, the simulation of processes has made great strides over the past few years. Today, the software can predict relatively well what will happen on the workpiece. Unfortunately, it is also highly complex and requires a lot of computing time. Thanks to clever simplification, experts from Fraunhofer ILT are now able to offer the first-ever simulation software that calculates processes in real time and also runs on tablet computers and smartphones. The fast software enables users to do without expensive experiments and to find optimum process parameters even more effectively.
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Researchers at Heidelberg University have devised a new way to study the phenomenon of magnetism. Using ultracold atoms at near absolute zero, they prepared a...
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