By a News Reporter-Staff News Editor at Science Letter -- Current study results on General Science have been published. According to news originating from Austin, Texas, by NewsRx correspondents, research stated, "Room temperature, broadly tunable, electrically pumped semiconductor sources in the terahertz spectral range, similar in operation simplicity to diode lasers, are highly desired for applications. An emerging technology in this area are sources based on intracavity difference-frequency generation in dual-wavelength mid-infrared quantum cascade lasers."
Our news journalists obtained a quote from the research from the University of Texas, "Here we report terahertz quantum cascade laser sources based on an optimized non-collinear Cherenkov difference-frequency generation scheme that demonstrates dramatic improvements in performance. Devices emitting at 4 THz display a mid-infrared-to-terahertz conversion efficiency in excess of 0.6 mW W(-2) and provide nearly 0.12 mW of peak power output. Devices emitting at 2 and 3 THz fabricated on the same chip display 0.09 and 0.4 mW W(-2) conversion efficiencies at room temperature, respectively."
According to the news editors, the research concluded: "High terahertz-generation efficiency and relaxed phase-matching conditions offered by the Cherenkov scheme allowed us to demonstrate, for the first time, an external-cavity terahertz quantum cascade laser source tunable between 1.70 and 5."
For more information on this research see: Broadly tunable terahertz generation in mid-infrared quantum cascade lasers. Nature Communications, 2013;4():2021. (Nature Publishing Group - www.nature.com/; Nature Communications - www.nature.com/ncomms/)
The news correspondents report that additional information may be obtained from K. Vijayraghavan, Mircroelectronics Research Center, Dept. of Electrical and Computer Engineering, The University of Texas at Austin, 10100 Burnet Road, Austin, Texas 78758, United States. Additional authors for this research include Y. Jiang, M. Jang, A. Jiang, K. Choutagunta, A. Vizbaras, F. Demmerle, G. Boehm, M.C. Amann and M.A Belkin (see also General Science).
Keywords for this news article include: Texas, Austin, United States, General Science, North and Central America.
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