Search Results - "Seifert, Tom S."
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Spintronic sources of ultrashort terahertz electromagnetic pulses
Published in Applied physics letters (02-05-2022)“…Spintronic terahertz emitters are broadband and efficient sources of terahertz radiation, which emerged at the intersection of ultrafast spintronics and…”
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Ultrafast terahertz magnetometry
Published in Nature communications (25-08-2020)“…A material’s magnetic state and its dynamics are of great fundamental research interest and are also at the core of a wide plethora of modern technologies…”
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Femtosecond formation dynamics of the spin Seebeck effect revealed by terahertz spectroscopy
Published in Nature communications (24-07-2018)“…Understanding the transfer of spin angular momentum is essential in modern magnetism research. A model case is the generation of magnons in magnetic insulators…”
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4
Frequency‐Independent Terahertz Anomalous Hall Effect in DyCo5, Co32Fe68, and Gd27Fe73 Thin Films from DC to 40 THz
Published in Advanced materials (Weinheim) (01-04-2021)“…The anomalous Hall effect (AHE) is a fundamental spintronic charge‐to‐charge‐current conversion phenomenon and closely related to spin‐to‐charge‐current…”
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5
Terahertz Spin Current Dynamics in Antiferromagnetic Hematite
Published in Advanced science (01-06-2023)“…An important vision of modern magnetic research is to use antiferromagnets (AFMs) as controllable and active ultrafast components in spintronic devices…”
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Terahertz Spin‐to‐Charge Current Conversion in Stacks of Ferromagnets and the Transition‐Metal Dichalcogenide NbSe2
Published in Advanced materials interfaces (01-12-2022)“…Transition‐metal dichalcogenides (TMDCs) are an aspiring class of materials with unique electronic and optical properties and potential applications in…”
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Time-domain observation of ballistic orbital-angular-momentum currents with giant relaxation length in tungsten
Published in Nature nanotechnology (01-10-2023)“…The emerging field of orbitronics exploits the electron orbital momentum L . Compared to spin-polarized electrons, L may allow the transfer of magnetic…”
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8
Publisher Correction: Time-domain observation of ballistic orbital-angular-momentum currents with giant relaxation length in tungsten
Published in Nature nanotechnology (01-10-2023)Get full text
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9
Tunable ultrabroadband hybrid terahertz emitter combining a spintronic and a GaSe source
Published in Applied physics letters (18-11-2024)“…Terahertz (THz) time-domain spectroscopy (TDS) is a sensitive approach to material characterization. It critically relies on a sufficiently large bandwidth,…”
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10
Longitudinal and transverse electron paramagnetic resonance in a scanning tunneling microscope
Published in Science advances (30-09-2020)“…Longitudinal and transverse magnetic field gradients drive single-atom EPR in an STM owing to piezoelectric excitations. Electron paramagnetic resonance (EPR)…”
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11
Average power scaling of THz spintronic emitters efficiently cooled in reflection geometry
Published in Optics express (06-06-2022)“…Metallic spintronic terahertz (THz) emitters have become well-established for offering ultra-broadband, gapless THz emission in a variety of excitation…”
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Fiber-tip spintronic terahertz emitters
Published in Optics express (11-09-2023)“…Spintronic terahertz emitters promise terahertz sources with an unmatched broad frequency bandwidth that are easy to fabricate and operate, and therefore easy…”
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Accessing Ultrafast Spin-Transport Dynamics in Copper Using Broadband Terahertz Spectroscopy
Published in Physical review letters (31-05-2024)“…We study the spatiotemporal dynamics of ultrafast electron spin transport across nanometer-thick copper layers using ultrabroadband terahertz emission…”
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14
Rotating spintronic terahertz emitter optimized for microjoule pump-pulse energies and megahertz repetition rates
Published in Applied physics letters (12-08-2024)“…Spintronic terahertz emitters (STEs) are powerful sources of ultra-broadband single-cycle terahertz (THz) field transients. They work with any pump wavelength,…”
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15
Optical damage thresholds of single-mode fiber-tip spintronic terahertz emitters
Published in Optics express (01-07-2024)“…Spintronic terahertz emitters (STEs) are gapless, ultrabroadband terahertz sources that can be driven within a wide pump-wavelength and repetition-rate range…”
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Terahertz Spin-Conductance Spectroscopy: Probing Coherent and Incoherent Ultrafast Spin Tunneling
Published in Nano letters (03-07-2024)“…Thin-film stacks F | H consisting of a ferromagnetic-metal layer F and a heavy-metal layer H are spintronic model systems. Here, we present a method to measure…”
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Journal Article -
17
Frequency-Independent Terahertz Anomalous Hall Effect in DyCo 5 , Co 32 Fe 68 , and Gd 27 Fe 73 Thin Films from DC to 40 THz
Published in Advanced materials (Weinheim) (01-04-2021)“…The anomalous Hall effect (AHE) is a fundamental spintronic charge-to-charge-current conversion phenomenon and closely related to spin-to-charge-current…”
Get full text
Journal Article -
18
Accurate measurement of atomic magnetic moments by minimizing the tip magnetic field in STM-based electron paramagnetic resonance
Published in Physical review research (01-12-2021)“…Electron paramagnetic resonance (EPR) performed with a scanning tunneling microscope (STM) allows for probing the spin excitation of single atomic species with…”
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19
Shot-noise limited detection of terahertz transients from spintronic emitters
Published in 2023 48th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) (17-09-2023)“…Here, we show polarization switching of THz radiation from spintronic emitters by modulation of an external magnetic field at 787 kHz. Thereby, shot-noise…”
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Conference Proceeding -
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Time-Domain Spectroscopy for Space Exploration at Terahertz energy scales
Published in 2023 48th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) (17-09-2023)“…In recent years, short pulse lasers have made massive progress and space-ready femtosecond laser systems are under development [1]. Moreover, employing…”
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Conference Proceeding