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Your search keyword '"Tobias Kampfrath"' showing total 3 results
Start Over Author "Tobias Kampfrath" Journal conference on lasers and electro-optics
3 results on '"Tobias Kampfrath"'

1. High-Power Excitation of Spintronic THz Emitter in the Back-Cooled Reflection Geometry

Author

Tim Vogel, Alan Omar, Samira Mansourzadeh, Frank Wulf, Natalia Martín Sabanés, Melanie Müller, Tom Seifert, Alexander Weigel, Gerhard Jakob, Mathias Kläui, Ioachim Pupeza, Tobias Kampfrath, and Clara J. Saraceno

Abstract

We present THz generation in a back-cooled spintronic THz emitter in reflection geometry, excited with a high-average power Yb-laser providing up to 18.5 W at 400 kHz repetition rate. This allows us to increase the THz power.

Published
2022
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2. Quantitative sampling of femtosecond THz voltage pulses and hot electron dynamics in an STM junction

Author

Takashi Kumagai, Melanie Müller, F. Krecinic, Tobias Kampfrath, Martin Wolf, F. Schulz, and N. Martin Sabanes

Subjects
Materials science, business.industry, Terahertz radiation, Scanning electron microscope, Photoconductivity, Physics::Optics, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, law.invention, Semiconductor laser theory, Condensed Matter::Materials Science, Computer Science::Emerging Technologies, law, Condensed Matter::Superconductivity, Femtosecond, Optoelectronics, Scanning tunneling microscope, business, Quantum tunnelling, Common emitter
Abstract

We demonstrate phase-resolved detection of femtosecond voltage transients in a scanning tunneling microscope induced by ultrabroadband THz pulses from a spintronic emitter, and probe hot electron dynamics inside the photoexcited junction on the nano-femtoscale.

Published
2021
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3. Generation of broadband THz transients via metallic spintronic emitters driven by 20-fs pulses at 1030 nm

Author

Tobias Kampfrath, Tim Vogel, Clara J. Saraceno, Leon Helms, Gerhard Jakob, Christina Hofer, Theresa Buberl, Alexander Weigel, Oleg Pronin, Ioachim Pupeza, Mathias Kläui, Natalia Martín Sabanés, and Kilian Fritsch

Subjects
Materials science, Spintronics, Terahertz radiation, business.industry, Bandwidth (signal processing), 02 engineering and technology, 021001 nanoscience & nanotechnology, Laser, 01 natural sciences, law.invention, 010309 optics, Optical rectification, law, Electric field, 0103 physical sciences, Broadband, Optoelectronics, Photonics, 0210 nano-technology, business
Abstract

We explore power and bandwidth scaling for the generation of highly-temporally-confined THz transients from spintronic emitters, driven by the 250-fs and 20-fs pulses of a high-power 28-MHz Yb-based laser, spectrally centered at 1030 nm.

Published
2020
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