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Journals and Conferences
We present a comprehensive model to study the thermal effects in quantum cascade (QC) lasers for continuous-wave (CW) operation at and above room temperature. This model self-consistently solves the… (More)
Enhancement of light extraction of GaN-based flip-chip indium-tin-oxide light-emitting diodes (FC ITO LEDs) with an omnidirectional reflector (ODR) is presented. The ODR consisting of alternating… (More)
In this paper, we demonstrate two antireflective coatings (ARC) structures enable the absorber stacks to meet the exposure and inspection requirements at the same time. The absorber stack is… (More)
For a high-performance quantum cascade laser structure, a 50% reduction in doping level and 33% reduction in injection barrier thickness yields 5 times stronger luminescence, 20% smaller optical… (More)
A photonic crystal blue light emitting diodes is fabricated and characterized. The optical power enhancement with factor of two is demonstrated and could be attributed to guided resonances.
We demonstrate the effects of varying the injection barrier thickness and injector doping level on current transport and gain bandwidth in a lambda ~ 8.2 mum quantum cascade laser.
We report on high duty-cycle pulsed and burst-mode operation of lambda ~ 8 mum quantum cascade lasers under ambient conditions for photo-acoustic spectroscopy. An optimum in average optical power and… (More)