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We present investigations of photoconductive antennas (PCA) based on low temperature grown GaAs (LT GaAs) on silicon substrates for terahertz (THz) detection and generation. The PCAs consist of 2 μm thick layers of LT GaAs bonded on a high resistivity silicon substrate in order to reduce the intrinsic absorption losses around 8 THz due to a strong phonon resonance in GaAs. Using 20 fs long pump pulses...
Increasing role of electricity energy in economical development and living level of human societies is unavoidable. Over these recent years the environmental issues such as increase of Pollutants, the global warming, the establishment of strict laws of environmental issues and international protocols like Kyoto in 1997 and Copenhagen in 2009, also economical issues like the fluctuation of the oil...
Renewable energy sources (RES), including wind power plants, have high priority of promotion in the energy policy of the European Union as well as in Poland. An increasing share of RES and distributed generation (DG), should, as has been assumed, provide improvement in reliability of electricity delivery to the customers. Paper presented here concentrates on the problem of availability of RES improvement...
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