Roman Sobolewski
University of Rochester
375 Papers
1.9K Citations
Roman Sobolewski is an academic researcher from University of Rochester. The author has contributed to research in topics: Thin film & Femtosecond. The author has an hindex of 39, co-authored 361 publications. Previous affiliations of Roman Sobolewski include Polish Academy of Sciences & Moscow State Pedagogical University.
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Papers
Picosecond superconducting single-photon optical detector
Gregory Goltsman,O. Okunev,G. M. Chulkova,A. Lipatov,A. D. Semenov,Konstantin Smirnov,B. M. Voronov,A. Dzardanov,C. Williams,Roman Sobolewski +9 more
TL;DR: In this article, a supercurrent-assisted hotspot-formation mechanism for ultrafast detection and counting of visible and infrared photons is presented, where a photon-induced hotspot leads to a temporary formation of a resistive barrier across the superconducting sensor strip and results in an easily measurable voltage pulse.
1.8K
Hot-electron effect in superconductors and its applications for radiation sensors
TL;DR: In this article, the main aspects of nonequilibrium hot-electron phenomena in superconductors and various theoretical models developed to describe the hotelectron effect are discussed, and the most successful practical devices such as terahertz mixers and direct intensity detectors for far-infrared radiation are presented.
Dielectric constants and crystal structures of CaYAlO4, CaNdAlO4, and SrLaAlO4, and deviations from the oxide additivity rule
Robert D. Shannon,R.A. Oswald,John B. Parise,B.H.T. Chai,P. Byszewski,A. Pajaczkowska,Roman Sobolewski +6 more
TL;DR: In this paper, the structures of CaYAlO 4, CaNdAlO4, and SrLaAlO 6 have been refined using single-crystal X-ray diffraction data.
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Ultrafast superconducting single-photon optical detectors and their applications
TL;DR: In this paper, the authors presented a new class of ultrafast single-photon detectors for counting both visible and infrared photons, based on photon-induced hotspot formation, which forces the supercurrent redistribution and leads to the appearance of a transient resistive barrier across an ultrathin, submicrometer-width, superconducting stripe.
98
Investigation of semiconducting YBaCuO thin films: A new room temperature bolometer
P. C. Shan,Zeynep Celik-Butler,Donald P. Butler,A. Jahanzeb,C.M. Travers,Witold Kula,Roman Sobolewski +6 more
TL;DR: In this article, the authors explored the application of the semiconducting phases of YBaCuO thin films as a bolometer for uncooled infrared detection, and the bolometer figures of merit, responsivity, and detectivity were calculated from the measured temperature coefficient of resistance (TCR) and the inherent noise characteristics of the temperature sensing element.
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