Thermodynamik (18 Artikel)

Optical frequency combs (OFC) have revolutionized various applications in applied and fundamental sciences that rely on the determination of absolute optical frequencies and frequency differences. ...

To enable the fabrication of high performance ultraviolet (UV) light-emitting diodes (LEDs) this work aims at improving the quality of AlN base layers on sapphire substrates. The main issues for UV...

Magnetic singularities in micron-sized ferromagnetic elements have been proposed for new concepts of magnetic data storage and are an ideal model system for the investigation of magnetization dynam...

The Josephson effect enables the creation of voltage standards with quantum accuracy by linking the electrical unit of voltage with the frequency. This work describes the implementation of Josephso...

This work presents progress in the root-cause analysis of power saturation mechanisms in continuous wave (CW) driven GaAs-based high-power broad area diode lasers operated at 935 nm. Target is to i...

One approach to detect gravitational waves, which have been postulated by Albert Einstein in his General Theory of Relativity, is based on interferometric measurements of length variations with a l...

Modern high-power broad area (BA) diode lasers are important building blocks for the materials processing industry, combining high optical output power with high conversion efficiency. However, the...

Due to the increasing demands industrially as well as scientifically on new optoelectronic devices for specific applications, semiconductor materials with desired energy band-gap are needed. In thi...

Um die spektrale Selektivität und Stabilität von rot-emittierenden Kantenemittern zu verbessern, wurden in dieser Arbeit umfassende Untersuchungen zur monolithischen Integration longitudinaler Mode...

Zum Verständnis des elektrischen Transports in Hochtemperatur-Supraleitern ist die Visualisierung des Stromtransports von Bedeutung. Die lokale Verteilung der Stromdichte und der daraus resultieren...

Chiral molecules exist in two geometric configurations of their atoms with mirror-image symmetry, which are called enantiomers. Many natural and organic molecules are chiral, such as peptides, enzy...

In der vorliegenden Arbeit werden Aspekte der Chipprozessierung untersucht, die die Zuverlässigkeit von (InAlGa)N-basierten Rippenwellenleiterlaserdioden beeinflussen. Als Ziel sollte die Lebensdau...

This work focuses on the development of AlGaAs-based diode laser (DL) bars optimized for reaching highest powers and efficiencies at low operation temperatures. Specifically, the quasi continuous w...

Organic dye laser stands a chance to become the next generation of the light source. It is very interesting because organic dyes can cover a wide range of the pectrum of visible light. To realise o...

Diese Arbeit beschäftigt sich mit der Untersuchung der Beeinflussung des Photoemissionsverhaltens von plasmonischen Anregungen in Metallen durch den organischen Halbleiter Aluminium-tris(8-hydroxyc...