Bound-to-continuum and two-phonon resonance, quantum-cascade lasers for high duty cycle, high-temperature operation
نویسندگان
چکیده
منابع مشابه
High-temperature operation of broadband bidirectional terahertz quantum-cascade lasers
Terahertz quantum cascade lasers (QCLs) with a broadband gain medium could play an important role for sensing and spectroscopy since then distributed-feedback schemes could be utilized to produce laser arrays on a single semiconductor chip with wide spectral coverage. QCLs can be designed to emit at two different frequencies when biased with opposing electrical polarities. Here, terahertz QCLs ...
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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 کامل“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 and high-temperature THz quantum-cascade lasers based on lens-coupled metal-metal waveguides.
A metal-metal waveguide quantum cascade laser with an abutted silicon hyperhemispherical lens is demonstrated at ~4.1 THz. The device produced 145 mW of peak pulsed power at 5 K with a wall-plug power efficiency of 0.7%, lasing up to a maximum operating temperature of 160 K. The far-field beam pattern has a full width at half-maximum value of ~4.8 degrees in the H plane. The same device produce...
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ژورنال
عنوان ژورنال: IEEE Journal of Quantum Electronics
سال: 2002
ISSN: 0018-9197,1558-1713
DOI: 10.1109/jqe.2002.1005404