V. Yu. Rumyantsev

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We report recent results on THz lasing in PbSnSe and HgCdTe. The wavelength of 46.3 microns was achieved in a PbSnSe laser with diffusion p-n junction. In HgCdTe waveguide structure with quantum wells (QWs) we demonstrate twofold increase in stimulated emission (SE) wavelength compared to previous works. The threshold pumping intensity is as low as 0.12(More)
The steppe marmot disappeared from the modern Penza region at the end of the 19th century. The history of the disappearance of the marmot and the results of its reintroduction in 1985–1989 are considered in the article. The characteristics of the modern state of the marmot settlements that formed as a result of the reintroduction are given.
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