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

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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.