Zobrazeno 1 - 10
of 178
pro vyhledávání: '"Bieler Mark"'
Autor:
Priyadarshi, Shekhar, Kieler, Oliver, Scarioni, Alexander Fernandez, Felgner, Judith, Widaa, Abdulrahman, Kohlmann, Johannes, Fordell, Thomas, Nissilä, Jaani, Kemppinen, Antti, Bieler, Mark
We demonstrate a cryogenic electro-optic sampling (EOS) setup that allows for the measurement of microwave signals at arbitrary positions on a cryogenic chip-scale device. We use a Josephson Arbitrary Waveform Synthesizer (JAWS) to generate quantum-a
Externí odkaz:
http://arxiv.org/abs/2411.00162
We study anomalous Hall currents in magnetically-biased bulk GaAs samples under the formation of Landau levels. The anomalous Hall currents are generated by ultrafast optical excitation of spin-polarized carriers and detected by time-resolved measure
Externí odkaz:
http://arxiv.org/abs/2410.05170
Autor:
Priyadarshi, Shekhar, Tian, Hao, Scarioni, Alexander Fernandez, Wolter, Silke, Kieler, Oliver, Kohlmann, Johannes, Nissilä, Jaani, Bieler, Mark
We have developed a cryogenic characterization platform for ultrafast photodiodes, whose time domain responses are extracted by electro-optic sampling using femtosecond laser pulses in a pump-probe configuration. The excitation of the photodiodes wit
Externí odkaz:
http://arxiv.org/abs/2309.06189
Autor:
Kalin, Jantje, Sievers, Sibylle, Kalin, Daniel, Bauer, Andreas, Abram, Robin, Füser, Heiko, Schumacher, Hans Werner, Pfleiderer, Christian, Bieler, Mark
Publikováno v:
PHYS. REV. APPLIED 21, 034065 (2024)
A key challenge for the realization of future skyrmion devices comprises the controlled creation, annihilation and detection of these topologically non-trivial magnetic spin textures. In this study, we report an all-optical approach for writing, dele
Externí odkaz:
http://arxiv.org/abs/2306.00123
Autor:
Kalin, Jantje, Sievers, Sibylle, Füser, Heiko, Schumacher, Hans Werner, García-Sánchez, Felipe, Bauer, Andreas, Pfleiderer, Christian, Bieler, Mark
Publikováno v:
Physical Review B 106, 054430 (2022)
We investigate the microwave spin excitations of the cubic chiral magnet Fe$_{0.75}$Co$_{0.25}$Si as driven by the thermal modulation of magnetic interactions via laser heating and probed by time-resolved measurements of the magneto-optical Kerr effe
Externí odkaz:
http://arxiv.org/abs/2202.04182
Autor:
Hu, Xiukun, Dai, Gaoliang, Sievers, Sibylle, Scarioni, Alexander Fernández, Neu, Volker, Bieler, Mark, Schumacher, Hans Werner
Magnetic force microscopy (MFM) measurements generally provide phase images which represent the signature of domain structures on the surface of nanomaterials. To quantitatively determine magnetic stray fields based on an MFM image requires calibrate
Externí odkaz:
http://arxiv.org/abs/1912.08437
Specification standards will soon be available for 5G mobile RF communications. What optical and electrical metrology is needed or available to support the development of the supporting optical communication systems? Device measurement, digital oscil
Externí odkaz:
http://arxiv.org/abs/1809.08934
We induce ultrafast photocurrents in a GaAs crystal exposed to a magnetic field by optical femtosecond excitation. The magneto-photocurrents are studied by time-resolved detection of the simultaneously emitted THz radiation. We find that their dynami
Externí odkaz:
http://arxiv.org/abs/1601.02962
Publikováno v:
Phys. Rev. Lett. 115, 257401 (2015)
We report on the time-resolved detection of the anomalous velocity, constituting charge carriers moving perpendicular to an electric driving field, in undoped GaAs quantum wells. For this we optically excite the quantum wells with circularly polarize
Externí odkaz:
http://arxiv.org/abs/1510.02231
We induce ultrafast magneto-photocurrents in a GaAs crystal employing interband excitation with femtosecond laser pulses at room temperature and non-invasively separate surface and bulk contributions to the overall current response. The separation be
Externí odkaz:
http://arxiv.org/abs/1502.04474