Zobrazeno 1 - 10
of 1 114
pro vyhledávání: '"Hartmut G"'
Autor:
Fanqi Meng, Zhenling Tang, Petr Ourednik, Jahnabi Hazarika, Michael Feiginov, Safumi Suzuki, Hartmut G. Roskos
Publikováno v:
APL Photonics, Vol 9, Iss 8, Pp 086103-086103-8 (2024)
Oscillators based on resonant tunneling diodes (RTDs) are able to reach the highest oscillation frequency among all electronic THz emitters. However, the emitted power from RTDs remains limited. Here, we propose linear RTD oscillator arrays capable o
Externí odkaz:
https://doaj.org/article/7040a10937b34d3aaca8e38020f49d2f
Autor:
Fanqi Meng, Frederik Walla, Sergey Kovalev, Jan-Christoph Deinert, Igor Ilyakov, Min Chen, Alexey Ponomaryov, Sergey G. Pavlov, Heinz-Wilhelm Hübers, Nikolay V. Abrosimov, Christoph Jungemann, Hartmut G. Roskos, Mark D. Thomson
Publikováno v:
Physical Review Research, Vol 5, Iss 4, p 043141 (2023)
We investigate ultrafast harmonic generation (HG) in Si:B, driven by intense pump pulses with fields reaching ∼100kVcm^{−1} and a carrier frequency of 300 GHz, at 4 K and 300 K, both experimentally and theoretically. We report several findings co
Externí odkaz:
https://doaj.org/article/97e7faecbcdf42079d00a04964207721
Publikováno v:
APL Photonics, Vol 8, Iss 2, Pp 026103-026103-8 (2023)
Antenna-coupled photomixers, serving as emitters and receivers of terahertz (THz) radiation, are the central active components of coherent optoelectronic THz systems. Here, we focus on the continuous-wave modality, which finds ample use for spectrosc
Externí odkaz:
https://doaj.org/article/925c2441b6544357bc5ec0bde731748b
This study proposes a novel approach utilizing a physics-informed deep learning (DL) algorithm to reconstruct occluded objects in a terahertz (THz) holographic system. Taking the angular spectrum theory as prior knowledge, we generate a dataset consi
Externí odkaz:
http://arxiv.org/abs/2408.13066
Autor:
Rahul Yadav, Florian Ludwig, Fahd Rushd Faridi, J. Michael Klopf, Hartmut G. Roskos, Sascha Preu, Andreas Penirschke
Publikováno v:
Sensors, Vol 23, Iss 7, p 3469 (2023)
We present the characterization of a Zero-bias Schottky diode-based Terahertz (THz) detector up to 5.56 THz. The detector was operated with both a table-top system until 1.2 THz and at a Free-Electron Laser (FEL) facility at singular frequencies from
Externí odkaz:
https://doaj.org/article/ebfd1c621bdc47019eb7889ca9915f8a
Autor:
Matthias M. Wiecha, Shihab Al-Daffaie, Andrey Bogdanov, Mark D. Thomson, Oktay Yilmazoglu, Franko Küppers, Amin Soltani, Hartmut G. Roskos
Publikováno v:
ACS Omega, Vol 4, Iss 26, Pp 21962-21966 (2019)
Externí odkaz:
https://doaj.org/article/841ee53a10a54a338c52f11c11b806a4
In the past decade, detection of THz radiation by plasma-wave-assisted frequency mixing in antenna-coupled field-effect transistors (TeraFETs) -- implemented in various semiconductor material systems (Si CMOS, GaN/AlGaN, GaAs/AlGaAs, graphene, etc.)
Externí odkaz:
http://arxiv.org/abs/2405.18764
Terahertz (THz) imaging is one of the hotspots in the field of optics, where the depth information retrieval is a key factor to restore the three-dimensional appearance of objects. Impressive results for depth extraction in visible and infrared wave
Externí odkaz:
http://arxiv.org/abs/2405.18317
Autor:
Krysl, Anastasiya, But, Dmytro B., Ikamas, Kęstutis, Holstein, Jakob, Shevchik-Shekera, Anna, Roskos, Hartmut G., Lisauskas, Alvydas
This paper presents a study on performance optimization and resonant frequency modification of terahertz detectors by the use of hyper-hemispherical silicon superstrate lenses. The detectors are patch-TeraFETs, i.e., field-effect transistors with mon
Externí odkaz:
http://arxiv.org/abs/2404.07715
Autor:
Meng, Fanqi, Tang, Zhenling, Ourednik, Petr, Hazarika, Jahnabi, Feiginov, Michael, Suzuki, Safumi, Roskos, Hartmut G.
Resonant tunneling diode (RTD) oscillators possess the highest oscillation frequency among all electronic THz emitters. However, the emitted power from RTDs remains limited. Here, we propose linear RTD-oscillator arrays capable of supporting coherent
Externí odkaz:
http://arxiv.org/abs/2404.07394