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High-temperature annealing of AlN films grown on 4H-SiC
/forschung/publikationen/high-temperature-annealing-of-aln-films-grown-on-4h-sic
The effect of high-temperature annealing (HTA) at 1700°C on AlN films grown on 4H-SiC substrates by metalorganic vapor phase epitaxy has been studied. It is shown that the structural quality of…
High-Temperature Annealing of AlGaN
/forschung/publikationen/high-temperature-annealing-of-algan
In the past few years, high-temperature annealing of AlN has become a proven method for providing AlN layers with low dislocation densities. Herein, the example of Al0.77Ga0.23N is used to…
Design of an Embedded Broadband Thermoelectric Power Sensor in the InP DHBT Process
/forschung/publikationen/design-of-an-embedded-broadband-thermoelectric-power-sensor-in-the-inp-dhbt-process
The thermopile-based thermoelectric sensor has emerged as an important approach for microwave power measurement. It employs the Seebeck effect, which converts the microwave power into the heat and…
Lifetimes and Quantum Efficiencies of Quantum Dots Deterministically Positioned in Photonic-Crystal Waveguides
/forschung/publikationen/lifetimes-and-quantum-efficiencies-of-quantum-dots-deterministically-positioned-in-photonic-crystal-waveguides
Interfacing single emitters and photonic nanostructures enables modifying their emission properties, such as enhancing individual decay rates or controlling the emission direction. To achieve full…
Reliability of UVC LEDs fabricated on AlN/sapphire templates with different threading dislocation densities
/forschung/publikationen/reliability-of-uvc-leds-fabricated-on-alnsapphire-templates-with-different-threading-dislocation-densities
The impact of different AlN/sapphire template technologies [i.e., planar, epitaxial lateral overgrown (ELO), and high temperature annealed sputtered ELO] is studied with respect to the…
EuPRAXIA Conceptual Design Report
/forschung/publikationen/eupraxia-conceptual-design-report
This report presents the conceptual design of a new European research infrastructure EuPRAXIA. The concept has been established over the last four years in a unique collaboration of 41 laboratories…
Engineering AlGaAs-on-insulator toward quantum optical applications
/forschung/publikationen/engineering-algaas-on-insulator-toward-quantum-optical-applications
Aluminum gallium arsenide has highly desirable properties for integrated parametric optical interactions: large material nonlinearities, maturely established nanoscopic structuring through epitaxial…
Vertical conductivity and Poole-Frenkel-ionization of Mg acceptors in AlGaN short-period superlattices with high Al mole fraction
/forschung/publikationen/vertical-conductivity-and-poole-frenkel-ionization-of-mg-acceptors-in-algan-short-period-superlattices-with-high-al-mole-fraction
Mg-doped AlGaN short-period superlattices with a high aluminum mole fraction are promising to fabricate highly efficient deep UV light emitting diodes. We present a robust and easy-to-implement…
Mode competition in broad-ridge-waveguide lasers
/forschung/publikationen/mode-competition-in-broad-ridge-waveguide-lasers-1
The lateral brightness achievable with high-power GaAs-based laser diodes having long and broad waveguides is commonly regarded to be limited by the onset of higher-order lateral modes. For the study…
Shifted excitation Raman difference spectroscopy: A promising tool for the investigation of soil
/forschung/publikationen/shifted-excitation-raman-difference-spectroscopy-a-promising-tool-for-the-investigation-of-soil
In this paper we demonstrate shifted excitation Raman difference spectroscopy (SERDS) for soil analysis as a proof of concept. Confocal Raman microscopy is performed for sample analysis as well as…