SERDS efficiently separates Raman from disturbing background signals, thus allowing qualitative and quantitative investigations of samples. For on-site soil analysis, we have developed a portable SERDS sensor system, successfully applied in a first field test.
Research News 2020
FBH develops UV LEDs for disinfection, e.g. to avoid infection with COVID19. To enhance output power and lifetime of such devices the impact of AlN/sapphire templates on the strain relaxation mechanisms and defect density in AlGaN layers was studied.
Dielectric constant and loss tangent of polymer materials at microwave frequencies are important parameters for various industrial processes. Of particular interest is their temperature dependence. The developed setup allows to measure these properties up to the melting temperature.
We have recently installed a hydrogen vacuum reflow solder system. Now, a more precise and stable positioning of components at high throughput is possible. Digitalization of process parameters additionally improves quality control.
A charge-shifting CCD-SERDS approach using a custom 830 nm dual-wavelength diode laser and a specialized CCD overcomes technical limitations of conventional CCD operation. It reduces susceptibility to variations during the measurement and enables novel applications.
Based on its GaN HEMT MMIC process, the FBH develops state-of-the-art TeraFETs. They work at room temperature with excellent sensitivity, comparable to classical diode-based performance. The THz frequency range is attractive for various applications in biology, medicine and industry.
To reduce power consumption of optoelectronic devices FBH conducts researches to lower contact resistance between the contact and the semiconductor material. Focus is the contact system at the Pd/gallium nitride (GaN) interface.