Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Negar Hekmat"'
Autor:
Alan Omar, Yicheng Wang, Tim Vogel, Negar Hekmat, Martin Hoffmann, Frank Meyer, Clara J. Saraceno
Publikováno v:
2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz).
We present the first temperature-dependent refractive index measurements of Gallium Phosphide (GaP) for a broad THz bandwidth extending to 4 THz and a wide temperature range from 77 K to 500 K. Our results show no significant degradation in velocity
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::54db5f9e2d7b361f9ef7b27130641183
https://doi.org/10.1109/irmmw-thz46771.2020.9370547
https://doi.org/10.1109/irmmw-thz46771.2020.9370547
Autor:
Alan Omar, Negar Hekmat, Clara J. Saraceno, Felix Fobbe, Martin Saraceno, Tim Vogel, Yicheng Wang, Frank Meyer, S. Mansourzadeh
Publikováno v:
Terahertz Photonics.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7e89db1a582277b09f993e1377ac8c33
https://doi.org/10.1117/12.2555388
https://doi.org/10.1117/12.2555388
Autor:
Negar Hekmat, Farhad Aslani, Frank Meyer, Yicheng Wang, S. Mansourzadeh, Alan Omar, Clara J. Saraceno, Tim Vogel, Martin Hoffmann
Publikováno v:
Ruhr-Universität Bochum
We explore GaP at cryogenic temperatures for optical rectification (OR) at 100 W average excitation power for the first time. Our results indicate this is a promising route for broadband THz radiation using kW-class excitation.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::298b22b8413d8ff9bb8ff01e0796b670
https://doi.org/10.1364/assl.2020.af2a.3
https://doi.org/10.1364/assl.2020.af2a.3
Autor:
Frank Meyer, Martin Hoffmann, Alan Omar, Yicheng Wang, Tim Vogel, Shahwar Ahmed, Clara J. Saraceno, Negar Hekmat
Publikováno v:
14th Pacific Rim Conference on Lasers and Electro-Optics (CLEO PR 2020).
We present latest progress in the demonstration of single-cycle THz sources with high average power, based on excitation with MHz repetition rate, hundred-watt class modelocked thin-disk oscillators
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d9c8d464badd3cbdb1279f9514d20dec
https://doi.org/10.1364/cleopr.2020.c12b_1
https://doi.org/10.1364/cleopr.2020.c12b_1
Autor:
F. Fobbe, Yicheng Wang, Alan Omar, Tim Vogel, Negar Hekmat, Clara J. Saraceno, Frank Meyer, S. Mansourzadeh, Martin Hoffmann
Publikováno v:
2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz).
We demonstrate optical rectification in GaP crystals driven by a 100 W-class thin-disk oscillator, nonlinearly compressed to sub-100 fs in a multi-pass cell. In optimized conditions, we obtain a power of 1.35 mW, which is the highest average power ac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::81f5dbac82140b0e109ab0621a23f6c0
https://doi.org/10.1109/irmmw-thz.2019.8874383
https://doi.org/10.1109/irmmw-thz.2019.8874383
Autor:
Frank Meyer, S. Mansourzadeh, Farhad Asiani, Martin Hoffmann, Negar Hekmat, Felix Fobbe, Clara J. Saraceno, Yicheng Wang
Publikováno v:
2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC).
THz-TDS is a well-established technique for an extremely large variety of applications. However, many areas are stalled by the low average power of ultrafast laser driven THz sources. One example of an area that would immensely benefit from higher av
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cd47329ae7685eab7e6be619b29a73e2
https://doi.org/10.1109/cleoe-eqec.2019.8872435
https://doi.org/10.1109/cleoe-eqec.2019.8872435
Autor:
Frank Meyer, S. Mansourzadeh, Negar Hekmat, Tim Vogel, Alan Omar, Yicheng Wang, Martin Hoffmann, Clara J. Saraceno, F. Fobbe
Publikováno v:
2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC).
The wide application possibilities of terahertz time domain spectroscopy (THz-TDS) has led to a rapid progress in the performance of table-top phase-stable, few-cycle THz sources, which keep setting new records in terms of bandwidth, tunability and p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f15df321308f52c432b565d56f35690e
https://doi.org/10.1109/cleoe-eqec.2019.8872938
https://doi.org/10.1109/cleoe-eqec.2019.8872938
Autor:
Frank Meyer, Clara J. Saraceno, Negar Hekmat, S. Mansourzadeh, Martin Hoffmann, F. Fobbe, Farhad Aslani
Publikováno v:
Optics letters. 43(24)
We demonstrate terahertz (THz) generation at megahertz repetition rate by optical rectification in GaP crystals, using excitation average power levels exceeding 100 W. The laser source is a state-of-the-art diode-pumped Yb:YAG SESAM-mode-locked thin-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d62f6a94c5d30d56b92ffdd16277e2d6
https://pubmed.ncbi.nlm.nih.gov/30547967
https://pubmed.ncbi.nlm.nih.gov/30547967
Publikováno v:
2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz).
We demonstrate THz generation by optical rectification in GaP crystals using excitation average power levels exceeding 100 $W$ . The laser source is a state-of-the-art diode-pumped Yb:YAG modelocked thin-disk laser, capable of generating 120W at 13.4
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f7b92301237b5039fd905f49fd2a4291
https://doi.org/10.1109/irmmw-thz.2018.8510072
https://doi.org/10.1109/irmmw-thz.2018.8510072
Publikováno v:
Ultrafast Bandgap Photonics III.
Progress in the performance of high-power ultrafast lasers continues to give momentum to many fields of science and technology. Nowadays, ultrafast laser systems delivering hundreds of watts of average power with pulse energies ranging from hundreds
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2989b47504040b2378963f2f1e23d063
https://doi.org/10.1117/12.2312016
https://doi.org/10.1117/12.2312016