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Monte Carlo analysis of the terahertz difference frequency generation susceptibility in quantum cascade laser structures
(Optical Society of American (OSA), 2015)Based on self-consistent ensemble Monte Carlo simulations coupled to the optical field dynamics, we investigate the giant nonlinear susceptibility giving rise to terahertz difference frequency generation in quantum cascade ... -
Monte-Carlo Analysis of the Nonlinear Susceptibility in Quantum Cascade Laser Structures for THz Difference Frequency Generation
(OSA The Optical Society, 2015) -
Nano-antenna arrays for the infrared regime
(VDE-Verlag, 2014)Infrared detectors for the long-wave infrared range (lwir) are of special interest due to their ability to detect blackbody radiation of objects at room temperature. Such detectors are attractive candidates for various ... -
THz quantum cascade lasers for operation above cryogenic temperatures
(SPIE, 2013)High temperature operation of terahertz (THz) sources based on quantum cascade lasers (QCLs) is discussed. THz QCLs are compact, powerful sources but can only operate at cryogenic temperatures. State-of-the art THz QCLs ... -
Role of collisional broadening in Monte Carlo simulations of terahertz quantum cascade lasers
(2013)Using a generalized version of Fermi's golden rule, collisional broadening is self-consistently implemented into ensemble Monte Carlo carrier transport simulations, and its effect on the transport and optical properties ... -
Ultra-thin titanium oxide
(2012)We demonstrate the fabrication of ultra-thin titanium oxide films by plasma-induced surface oxidation. Ellipsometry measurements indicate an oxide thickness of about 2 nm. Electrical characterization was performed on ...