R
Roman Sobolewski
Researcher at University of Rochester
Publications - 374
Citations - 7220
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 receiving 6836 citations. Previous affiliations of Roman Sobolewski include Polish Academy of Sciences & Moscow State Pedagogical University.
Papers
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Journal ArticleDOI
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.
Journal ArticleDOI
Detection efficiency of large-active-area NbN single-photon superconducting detectors in the ultraviolet to near-infrared range
A. Verevkin,Jie Zhang,Roman Sobolewski,A. Lipatov,O. Okunev,G. M. Chulkova,Alexander Korneev,Konstantin Smirnov,Gregory Goltsman,A. D. Semenov +9 more
TL;DR: In this article, the spectral sensitivity of superconducting NbN thin-film single-photon detectors (SPDs) is investigated and the spectral dependences of the detection efficiency at the 0.4 to 3.0-μm-wavelength range are presented.
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Sensitivity and gigahertz counting performance of NbN superconducting single-photon detectors
Alexander Korneev,P. Kouminov,V. Matvienko,G. M. Chulkova,Konstantin Smirnov,B. M. Voronov,Gregory Goltsman,Marc Currie,William Lo,K. Wilsher,Jie Zhang,W. Slysz,Aaron Pearlman,A. Verevkin,Roman Sobolewski +14 more
TL;DR: In this article, the authors measured the quantum efficiency (QE), GHz counting rate, jitter, and noise-equivalent power (NEP) of nanostructured NbN superconducting single-photon detectors (SSPDs) in the visible to infrared radiation range.
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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.
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Picosecond hot-electron energy relaxation in NbN superconducting photodetectors
Konstantin Ilin,Martin Lindgren,Marc Currie,A. D. Semenov,Gregory Goltsman,Roman Sobolewski,Serguei Cherednichenko,E. M. Gershenzon +7 more
TL;DR: In this paper, the authors reported time-resolved characterization of superconducting NbN hot-electron photodetectors using an electro-optic sampling method.