منابع مشابه
“High-temperature and high-power THz quantum cascade lasers”
The highest temperature performance in terahertz QCLs has been demonstrated by using active regions based on the resonant-phonon depopulation scheme along with metalmetal waveguides to provide low-loss confinement, which have been used to demonstrate maximum temperatures of 164 K in pulsed mode and 117 K in cw mode. It is expected that there are two primary mechanisms which reduce the populatio...
متن کاملTemperature Effect on THz Quantum Cascade Lasers
A simple semi-phenomenological model, which accurately predicts the dependence of thresholdcurrent for temperature of Resonant-phonon three well quantum cascade laser based on verticaltransitions is offered. We found that, the longitude optical phonon scattering of thermally excitedelectrons is the most important limiting factor for thermal performance of high frequency THz QCLs.In low frequenc...
متن کاملHigh-Power Growth-Robust InGaAs/InAlAs Terahertz Quantum Cascade Lasers
We report on high-power terahertz quantum cascade lasers based on low effective electron mass InGaAs/InAlAs semiconductor heterostructures with excellent reproducibility. Growth-related asymmetries in the form of interface roughness and dopant migration play a crucial role in this material system. These bias polarity dependent phenomena are studied using a nominally symmetric active region resu...
متن کاملHigh power quantum cascade ring lasers and possible applications
Yanbo Bai received his M.S. degree in Physics and Ph.D. degree in Electrical Engineering from Northwestern University in 2005 and 2011. He is currently a research assistant professor at Northwestern. Since 2005, he has been with the Center for Quantum Devices. His research holds the current performance records of mid-IR quantum cascade lasers (QCLs) in terms of the output power and wall plug ef...
متن کاملDesign Optimization for 4.1-THZ Quantum Cascade Lasers
We present an optimized design for GaAs/AlGaAs quantum cascade lasers operating at 4.1THz. This was based on a three-well active module with diagonal radiative transition. This was performed by modifying the existing model structure, to reduce the parasitic anticrossings (leakage currents) as well as the optical gain linewidth. While the gain FWHM was reduced by more than 50% the gain pea...
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ژورنال
عنوان ژورنال: New Journal of Physics
سال: 2009
ISSN: 1367-2630
DOI: 10.1088/1367-2630/11/12/125017