Zobrazeno 1 - 10
of 217
pro vyhledávání: '"Münzenberg, Markus"'
Autor:
Jechumtál, Jiří, Rouzegar, Reza, Gueckstock, Oliver, Denker, Christian, Hoppe, Wolfgang, Remy, Quentin, Seifert, Tom S., Kubaščík, Peter, Woltersdorf, Georg, Brouwer, Piet W., Münzenberg, Markus, Kampfrath, Tobias, Nádvorník, Lukáš
We study the spatiotemporal dynamics of ultrafast electron spin transport across nanometer-thick copper layers using broadband terahertz spectroscopy. Our analysis of temporal delays, broadening and attenuation of the spin-current pulse revealed ball
Externí odkaz:
http://arxiv.org/abs/2310.12082
Autor:
Alostaz, Afnan, Gueckstock, Oliver, Tong, Jungwei, Kredl, Jana, In, Chihun, Münzenberg, Markus, Seifert, Tom S.
Linear terahertz time-domain spectroscopy (THz-TDS) is a sensitive probe for material characterization including thickness measurements of thin layers. These applications critically rely on a sufficiently large bandwidth, which is not straightforward
Externí odkaz:
http://arxiv.org/abs/2310.12012
Autor:
Winkel, Tristan Joachim, Parvini, Tahereh Sadat, Stiewe, Finn-Frederik, Walowski, Jakob, Moradi, Farshad, Münzenberg, Markus
Spintronic THz emitters have attracted much attention due to their desirable properties, such as affordability, ultra-wideband capability, high efficiency, and tunable polarization. In this study, we investigate the characteristics of THz signals, in
Externí odkaz:
http://arxiv.org/abs/2307.02232
Autor:
Parvini, Tahereh Sadat, Paz, Elvira, Böhnert, Tim, Schulman, Alejandro, Benetti, Luana, Oberbauer, Felix, Walowski, Jakob, Moradi, Farshad, Ferreira, Ricardo, Münzenberg, Markus
We have developed and optimized two categories of spin transfer torque magnetic tunnel junctions (STT-MTJs) that exhibit a high tunnel magnetoresistance (TMR) ratio, low critical current, high outputpower in the micro watt range, and auto-oscillation
Externí odkaz:
http://arxiv.org/abs/2303.12450
Autor:
Kleinke, Tobias, Stiewe, Finn-Frederik, Winkel, Tristan, Geist, Norman, Martens, Ulrike, Delcea, Mihaela, Walowski, Jakob, Münzenberg, Markus
THz spectroscopy has reached imaging capability with a spatial resolution of a few micrometres. This property enables measurements and imaging of biological samples like cells. THz photons have very low photon energies in the millielectronvolt range.
Externí odkaz:
http://arxiv.org/abs/2212.04157
Autor:
Jha, Neha, Paryar, Anand, Parvini, Tahereh Sadat, Denker, Christian, Vardhanapu, Pavan K., Vijaykumar, Gonela, Ahrens, Arne, Seibt, Michael, Moodera, Jagadeesh S., Mandal, Swadhin K., Münzenberg, Markus
Delocalized carbon-based radical species with unpaired spin, such as phenalenyl (PLY) radical, opened avenues for developing multifunctional organic spintronic devices. Here we develop a novel technique based on a three-dimensional shadow mask and th
Externí odkaz:
http://arxiv.org/abs/2209.05073
Autor:
Rathje, Christopher, von Seggern, Rieke, Gräper, Leon A., Kredl, Jana, Walowski, Jakob, Münzenberg, Markus, Schäfer, Sascha
Spintronic emitters are a unique class of terahertz (THz) sources due to their quasi-two-dimensional geometry and thereby their capability to couple to resonator near fields. Global excitation of the emitters often obstructs the intricate details of
Externí odkaz:
http://arxiv.org/abs/2209.02542
Autor:
Kohlmann, Marcel, Denker, Christian, Passler, Nikolai C., Kredl, Jana, Wolf, Martin, Münzenberg, Markus, Paarmann, Alexander
Polaritons can provide strong optical field enhancement allowing to boost light-matter interaction. Here, we experimentally observe enhancement of mid-infrared second-harmonic generation (SHG) using grating-coupled surface phonon polaritons of the 6H
Externí odkaz:
http://arxiv.org/abs/2209.00375
Autor:
Stiewe, Finn-Frederik, Winkel, Tristan, Kleinke, Tobias, Tubandt, Tobias, Heyen, Hauke, Vollroth, Lucas, Martens, Ulrike, Müller, Cai, McCord, Jeffrey, Walowski, Jakob, Münzenberg, Markus
In our study, we determine the alignment of magnetic domains in a CoFeB layer using THz radiation. We generate THz-pulses by fs-laser-pulses in magnetized CoFeB/Pt heterostructures, based on spin currents. An LT-GaAs Auston switch detects the radiati
Externí odkaz:
http://arxiv.org/abs/2208.08219
Autor:
Stiewe, Finn-Frederik, Winkel, Tristan, Sasaki, Yuta, Tubandt, Tobias, Kleinke, Tobias, Denker, Christian, Martens, Ulrike, Meyer, Nina, Parvini, Tahereh Sadat, Mizukami, Shigemi, Walowski, Jakob, Münzenberg, Markus
Publikováno v:
Appl. Phys. Lett. 120, 032406 (2022)
THz-spectroscopy is an attractive imaging tool for scientific research, especially in life science, offering non-destructive interaction with matter due to its low photon energies. However, wavelengths above $100{\mu}m$ principally limit its spatial
Externí odkaz:
http://arxiv.org/abs/2111.05023