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Sub-picosecond pulsed THz FET detector characterization in plasmonic detection regime based on autocorrelation technique
/en/research/publications/sub-picosecond-pulsed-thz-fet-detector-characterization-in-plasmonic-detection-regime-based-on-autocorrelation-technique
Many THz applications require detection of sub-picosecond THz pulses. Electronic detectors, in particular, can address this challenge. We report on the detection of sub-picosecond THz pulses…
Efficient coupling of heat-flow and electro-optical models for simulation of dynamics in high-power broad-area semiconductor lasers
/en/research/publications/efficient-coupling-of-heat-flow-and-electro-optical-models-for-simulation-of-dynamics-in-high-power-broad-area-semiconductor-lasers
The aim of the work presented here is an efficient coupling of a heat flow (HF) model defined on multiple vertical-lateral subdomains and a dynamic electro-optical (EO) model acting in the…
AlGaN multi-quantum barriers for electron blocking in group III-nitride devices
/en/research/publications/algan-multi-quantum-barriers-for-electron-blocking-in-group-iii-nitride-devices
In this paper we investigate the enhancement of electron blocking in AlGaN multi-quantum barriers (MQBs). Simulations of effective barrier height of Al0.2Ga0.8N/GaN-MQBs were performed in order to…
Tri-carbon defects in carbon doped GaN
/en/research/publications/tri-carbon-defects-in-carbon-doped-gan
Carbon doped GaN crystals grown by hydride vapor phase epitaxy have been investigated using mid-infrared and near-ultraviolet absorption spectroscopy. Two local vibrational modes (LVMs) at…
Localization of current-induced degradation effects in (InAlGa)N-based UV-B LEDs
/en/research/publications/localization-of-current-induced-degradation-effects-in-inalgan-based-uv-b-leds
The degradation behavior of ultraviolet-B light emitting diodes (UV-B LEDs) emitting near 310 nm has been investigated and a method to localize the degradation effects is presented. Measurements…
On the optical polarization properties of semipolar (2021) and (2021) InGaN/GaN quantum wells
/en/research/publications/on-the-optical-polarization-properties-of-semipolar-2021-and-2021-ingangan-quantum-wells
In the framework of k·p-theory, semipolar (2021) and (2021) InGaN/GaN quantum wells (QWs) have equivalent band structures and are expected to have identical optical polarization properties.…
MOVPE Growth of Smooth and Homogeneous Al0.8Ga0.2N:Si Superlattices as UVC Laser Cladding Layers
/en/research/publications/movpe-growth-of-smooth-and-homogeneous-al08ga02nsi-superlattices-as-uvc-laser-cladding-layers
Smooth, uniform and conductive AlxGa1-xN layers with high aluminum mole fractions of x > 0.7 are required as cladding layers for laser diodes emitting in the deep ultraviolet spectral…
High power Y-branch MOPA-system with 9.7 nm wavelength tunability for IR up-conversion detection
/en/research/publications/high-power-y-branch-mopa-system-with-97-nm-wavelength-tunability-for-ir-up-conversion-detection
A compact master oscillator power amplifier (MOPA) laser system will be presented, consisting of Y-branch distributed Bragg reflector (DBR) laser and a tapered power amplifier, constructed on a…
Sparse Random SAR Trajectories for a Millimeter Wave 3D Radar Scanner
/en/research/publications/sparse-random-sar-trajectories-for-a-millimeter-wave-3d-radar-scanner
By use of a simplified mathematical model assuming far-field conditions and time-harmonic transmitted electromagnetic waves, the SAR trajectory (SAR = synthetic aperture radar) for a millimeter wave…
Towards 100 Gbps Wireless Networks Enabled by Millimeter Wave Traveling Wave Tubes
/en/research/publications/towards-100-gbps-wireless-networks-enabled-by-millimeter-wave-traveling-wave-tubes
New generation networks for 5G need a breakthrough to support the unstoppable increase of internet traffic. Millimeter waves offer multi-GHz bandwidth for multigigabit per second data rate. For the…