Towards infrared diamond optoelectronics: time-resolved spectroscopy of excited acceptors in diamond

• Applicant: Professor Dr. Heinz-Wilhelm Hübers
• Subject Area: Experimental Condensed Matter Physics
• Term: from 2017 to 2020
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 336679739

The research topic proposed by the groups at Humboldt-Universität zu Berlin and the Institute for Physics of Microstructure of the Russian Academy of Sciences is the experimental investigation of excited states in boron-doped diamond crystals. The lifetimes of the excited states will be determined by mid-infrared pump-probe spectroscopy and time-resolving Fourier transform infrared absorption spectroscopy. The interaction of excited states with phonon bands will be studied by high-field magneto-optical spectroscopy. The results will be compared with a theoretical model of hole capture in boron-doped diamond. Based on these results we will investigate the potential of boron-doped diamond as a emitter for mid-infrared radiation. The HUB team has about 15 years of experience in semiconductor spectroscopy, in particular with time-resolving techniques, as well as on silicon terahertz lasers and the development of fast terahertz detectors with ps-ns response times. The proposed research is based on this heritage.

• DFG Programme: Research Grants