Zobrazeno 1 - 10
of 407
pro vyhledávání: '"Roman SOBOLEWSKI"'
Autor:
Roman Adam, Derang Cao, Daniel E. Bürgler, Sarah Heidtfeld, Fangzhou Wang, Christian Greb, Jing Cheng, Debamitra Chakraborty, Ivan Komissarov, Markus Büscher, Martin Mikulics, Hilde Hardtdegen, Roman Sobolewski, Claus M. Schneider
Publikováno v:
npj Spintronics, Vol 2, Iss 1, Pp 1-8 (2024)
Abstract The mechanism of THz generation in ferromagnet/metal (F/M) bilayers has been typically ascribed to the inverse spin Hall effect (ISHE). Here, we fabricated Pt/Fe/Cr/Fe/Pt multilayers containing two back-to-back spintronic THz emitters separa
Externí odkaz:
https://doaj.org/article/af84356d081249bfb391cf35b5bd4f6f
Autor:
Debamitra Chakraborty, Bradley N. Mills, Jing Cheng, Ivan Komissarov, Scott A. Gerber, Roman Sobolewski
Publikováno v:
ACS Omega, Vol 8, Iss 11, Pp 9925-9933 (2023)
Externí odkaz:
https://doaj.org/article/a0e0113ea578454d8d01623c72c3cb1d
Autor:
Debamitra Chakraborty, Robert Boni, Bradley N. Mills, Jing Cheng, Ivan Komissarov, Scott A. Gerber, Roman Sobolewski
Publikováno v:
Sensors, Vol 24, Iss 7, p 2066 (2024)
Transient terahertz time-domain spectroscopy (THz-TDS) imaging has emerged as a novel non-ionizing and noninvasive biomedical imaging modality, designed for the detection and characterization of a variety of tissue malignancies due to their high sign
Externí odkaz:
https://doaj.org/article/99a7c5511aa04a3194a07483114f7511
Autor:
Martin Mikulics, Roman Adam, Genyu Chen, Debamitra Chakraborty, Jing Cheng, Anthony Pericolo, Ivan Komissarov, Daniel E. Bürgler, Sarah F. Heidtfeld, John Serafini, Stefan Preble, Roman Sobolewski, Claus M. Schneider, Joachim Mayer, Hilde H. Hardtdegen
Publikováno v:
Crystals, Vol 13, Iss 8, p 1267 (2023)
The increase of device lifetime and reliability of THz photomixers will play an essential role in their possible future application. Therefore, their optimal work conditions/operation range, i.e., the maximal incident optical power should be experime
Externí odkaz:
https://doaj.org/article/afbcb2fb73534303bbd335bace081f0e
Autor:
Genyu Chen, Debamitra Chakraborty, Jing Cheng, Martin Mikulics, Ivan Komissarov, Roman Adam, Daniel E. Bürgler, Claus M. Schneider, Hilde Hardtdegen, Roman Sobolewski
Publikováno v:
Crystals, Vol 12, Iss 11, p 1635 (2022)
We present comprehensive studies on the emission of broadband, free-space THz transients from several highly resistive GaAs samples excited by femtosecond optical pulses. Our test samples are characterized by different degrees of disorder, ranging fr
Externí odkaz:
https://doaj.org/article/4c565dd9995f4d62892293fbd3468b10
Autor:
Sarah Heidtfeld, Roman Adam, Takahide Kubota, Koki Takanashi, Derang Cao, Carolin Schmitz-Antoniak, Daniel E. Bürgler, Fangzhou Wang, Christian Greb, Genyu Chen, Ivan Komissarov, Hilde Hardtdegen, Martin Mikulics, Roman Sobolewski, Shigemasa Suga, Claus M. Schneider
Publikováno v:
Physical Review Research, Vol 3, Iss 4, p 043025 (2021)
We generated pulses of electromagnetic radiation in the terahertz (THz) frequency range by optical excitation of Co_{2}Fe_{0.4}Mn_{0.6}Si (CFMS)/normal-metal (NM) bilayer structures. The CFMS is a Heusler alloy showing a band gap in one spin channel
Externí odkaz:
https://doaj.org/article/6f8082f62895429cb6753dd9d920d87e
Autor:
Artūras JUKNA, Lina STEPONAVIČIENĖ, Andrius MANEIKIS, Adulfas ABRUTIS, Vaclovas LISAUSKAS, Kristina ŠLIUŽIENĖ, Roman SOBOLEWSKI
Publikováno v:
Medžiagotyra, Vol 20, Iss 2, Pp 215-219 (2014)
This work reports on investigation of remnant oxygen content in optically-modified regions of 0.3-mm-thick YBa2Cu3O7–x films, patterned by a laser-writing technique in an inert ambient gas atmosphere at room temperature. A laser-treated region of w
Externí odkaz:
https://doaj.org/article/1c759840012e4a918e291e8ba8f32165
Autor:
Anton Koroliov, Genyu Chen, Kenneth M. Goodfellow, A. Nick Vamivakas, Zygmunt Staniszewski, Peter Sobolewski, Mirosława El Fray, Adam Łaszcz, Andrzej Czerwinski, Christiaan P. Richter, Roman Sobolewski
Publikováno v:
Applied Sciences, Vol 9, Iss 3, p 391 (2019)
The terahertz time-domain spectroscopy (THz-TDS) technique has been used to obtain transmission THz-radiation spectra of polymer nanocomposites containing a controlled amount of exfoliated graphene. Graphene nanocomposites (1 wt%) that were used in t
Externí odkaz:
https://doaj.org/article/b7c03b64102a45fab8d7ff991f152ffa
Autor:
Lina STEPONAVICIENE, Jonas SULCAS, Arturas JUKNA, Valentina PLAUSINAITIENE, Adulfas ABRUTIS, Mufei GONG, Roman SOBOLEWSKI
Publikováno v:
Medžiagotyra, Vol 17, Iss 2, Pp 180-185 (2011)
The 0.3-mm-thick, 50-mm-wide and 100-mm-long YBa2Cu3O7-x superconducting bridges with a laser-written, single, Π-shaped channel have been investigated by means of electronic transport measurements at temperatures below the onset of the bridge's supe
Externí odkaz:
https://doaj.org/article/75412ffbea254365b55159d22e7fc316
Autor:
Mikulics, Martin, Adam, Roman, Roman Sobolewski, Heidtfeld, Sarah, Cao, Derang, Bürgler, Daniel E., Schneider, Claus M., Mayer, Joachim, Hardtdegen, Hilde Helen
Publikováno v:
In FlatChem November 2022 36