Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Nelson M. Mbithi"'
Publikováno v:
Crystals, Vol 12, Iss 8, p 1173 (2022)
We report a semiconductor contact grating terahertz source design based on a rectangular profile for phase-matched terahertz generation in the long infrared pump wavelength range. The calculations show that the best diffraction efficiency can be achi
Externí odkaz:
https://doaj.org/article/819768b6cee44849834780bc7cc502da
Autor:
László Molnár, Nelson M. Mbithi, János Hebling, Gyula Polónyi, Priyo S. Nugraha, Jozsef A. Fulop, Mahmoud H. Abufadda, Andrea Buzády
Publikováno v:
Journal of Infrared, Millimeter, and Terahertz Waves.
The transmission of THz, near-infrared (1030 nm), and green (515 nm) pulses through Eisenia andrei body wall is studied, which consists of epithelial layer and circular and longitudinal muscles. Samples with the full-body cross-section were also inve
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6e9ae7501a73d70790070e050e1ced88
https://doi.org/10.1007/s10762-021-00827-1
https://doi.org/10.1007/s10762-021-00827-1
Autor:
Nelson M. Mbithi, György Tóth, Zoltán Tibai, Imene Benabdelghani, Luis Nasi, Gergő Krizsán, János Hebling, Gyula Polónyi
Publikováno v:
Journal of the Optical Society of America B. 39:2684
We present designs of semiconductor contact grating high energy terahertz pulse sources pumped by femtosecond pulses in the 1 to 5 µm wavelength range. Nearly wavelength-independent diffraction efficiencies as high as 69% and 75% in the ± 1 st diff
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c71672e8c952752736ecf9063a188fa7
https://doi.org/10.1364/josab.469552
https://doi.org/10.1364/josab.469552
Autor:
Nelson M. Mbithi, Gy. Polonyi, Gergo Krizsan, L. Nasi, Gy. Tóth, Zoltán Tibai, Jozsef A. Fulop, László Pálfalvi, János Hebling
Publikováno v:
2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz).
A new type of scalable semiconductor THz source is proposed. It contains only two optical elements: a volume phase holographic grating, used at normal incidence to introduce the necessary pulse-front-tilt for phase matching, and a plane-parallel semi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cfe3ff4c8395aadd6e76c6fbb92b7d0f
https://doi.org/10.1109/irmmw-thz50926.2021.9566955
https://doi.org/10.1109/irmmw-thz50926.2021.9566955
Autor:
Zoltán Tibai, Gyula Polónyi, György Tóth, Krizsan Gergo, Tobias Flöry, László Pálfalvi, Andrius Baltuška, Gábor Almási, Nelson M. Mbithi, Audrius Pugzlys, János Hebling, Edgar Kaksis, Vinzenz Stummer, Priyo S. Nugraha, Jozsef A. Fulop
Publikováno v:
2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz).
Optical rectification in lithium niobate and semiconductor nonlinear optical materials, utilizing the tilted-pulse-front technique, has become a versatile source of intense single- and multicycle THz pulses. Novel approaches recently proposed, and so
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2ce40513cf91f209f8fb5c738834caf6
https://doi.org/10.1109/irmmw-thz46771.2020.9370719
https://doi.org/10.1109/irmmw-thz46771.2020.9370719
Publikováno v:
OSA High-brightness Sources and Light-driven Interactions Congress 2020 (EUVXRAY, HILAS, MICS).
Simulations of contact grating design parameters in the wavelength range of 1.76-3.9 µm are presented for gallium arsenide and gallium phosphide. Diffraction efficiencies as high as 80% and 90% have been achieved in GaAs and GaP respectively.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7773a43c556f01daeb95c0aeab416a75
https://doi.org/10.1364/euvxray.2020.jw1a.13
https://doi.org/10.1364/euvxray.2020.jw1a.13
Autor:
Jozsef A. Fulop, Gy. Polonyi, János Hebling, B. Monoszlai, Gergő Krizsán, Gy. Tóth, Nelson M. Mbithi, Matyas Mechler, Priyo S. Nugraha
Publikováno v:
2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz).
Highly efficient generation of intense THz pulses from infrared-pumped semiconductor sources is presented. Concepts of increasing the efficiency and peak electric fields for single- and multicycle THz waveforms are discussed.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3b008db9f7c53aa17cd319e1e7e5c541
https://doi.org/10.1109/irmmw-thz.2019.8874482
https://doi.org/10.1109/irmmw-thz.2019.8874482
Autor:
Levente Tokodi, György Tóth, Zoltán Tibai, Matyas Mechler, Gergő Krizsán, Gyula Polónyi, Gábor Almási, László Pálfalvi, Priyo S. Nugraha, Jozsef A. Fulop, János Hebling, Nelson M. Mbithi, Ashutosh Sharma
Publikováno v:
Scopus-Elsevier
Novel compact LiNbO3 and semiconductor THz sources, based on the tilted-pulse-front technique, enable straightforward scaling to unprecedented focused field strengths up to 50 MV/cm in the low-frequency part of the THz spectrum.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::662efc2437c457e1a45fdf946c91a84b
https://doi.org/10.1364/tsa.2019.tth4d.4
https://doi.org/10.1364/tsa.2019.tth4d.4
Autor:
Nelson M. Mbithi, György Tóth, János Hebling, Gergo Krizsan, Matyas Mechler, Gyula Polónyi, Jozsef A. Fulop
Publikováno v:
Scopus-Elsevier
The low-(0.1–2 THz) and mid-frequency (2–20 THz) bands of the THz range can be accessed by optical rectification (OR) in LiNbO 3 (LN) [1] and organic crystals [2], respectively. The low-frequency band is optimally fitting for acceleration of char
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::90821f258b2aa008f080456dac6c0c0f
http://www.scopus.com/inward/record.url?eid=2-s2.0-85084528190&partnerID=MN8TOARS
http://www.scopus.com/inward/record.url?eid=2-s2.0-85084528190&partnerID=MN8TOARS
