0000000000181774

AUTHOR

Vasily V. Temnov

showing 3 related works from this author

Terahertz spectroscopy for all-optical spintronic characterization of the spin-Hall-effect metals Pt, W and Cu80Ir20

2018

Identifying materials with an efficient spin-to-charge conversion is crucial for future spintronic applications. In this respect, the spin Hall effect is a central mechanism as it allows for the interconversion of spin and charge currents. Spintronic material research aims at maximizing its efficiency, quantified by the spin Hall angle and the spin-current relaxation length . We develop an all-optical contact-free method with large sample throughput that allows us to extract and . Employing terahertz spectroscopy and an analytical model, magnetic metallic heterostructures involving Pt, W and Cu80Ir20 are characterized in terms of their optical and spintronic properties. The validity of our …

Materials scienceAcoustics and Ultrasonics530 Physicsterahertz emission spectroscopyFOS: Physical sciences02 engineering and technology01 natural sciencesTransition metalHall effect0103 physical sciencesMesoscale and Nanoscale Physics (cond-mat.mes-hall)ultrafast spincaloritronics010306 general physicsSpectroscopyComputingMilieux_MISCELLANEOUSterahertz emission spectroscopy; terahertz transmission spectroscopy; ultrafast spintronics; ultrafast spincaloritronicsCondensed Matter - Materials ScienceSpintronicsCondensed Matter - Mesoscale and Nanoscale Physicsbusiness.industryRelaxation (NMR)Refractory metalsMaterials Science (cond-mat.mtrl-sci)621021001 nanoscience & nanotechnologyCondensed Matter Physics530 PhysikCondensed Matter::Mesoscopic Systems and Quantum Hall Effect3. Good healthSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsTerahertz spectroscopy and technologyterahertz transmission spectroscopyultrafast spintronicsSpin Hall effect[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]Optoelectronics0210 nano-technologybusiness
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Gain Dynamics after Ultrashort Pulse Trains in Quantum Dot based Semiconductor Optical Amplifiers

2007

We study the gain dynamics in QD-based SOAs after excitation with fs-pulse trains of up to THz repetition rates. A complete ground-state gain recovery is found for 200 GHz repetition rates and injection currents around 90 mA.

PhysicsOptical amplifierbusiness.industryOptical microcavitySemiconductor laser theorylaw.inventionOpticsQuantum dot laserQuantum dotlawOptoelectronicsSemiconductor optical gainPhotonicsbusinessUltrashort pulse
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Ultrafast Gain Recovery in Quantum Dot based Semiconductor Optical Amplifiers

2007

Summary form only given. The limiting factor in ultrahigh bit rate amplification is the ultrafast population recovery in the resonant level, which is mainly limited by carrier capture and relaxation processes in the QD. We use pump-probe measurements resonant to the QDs confined states energies (ground and excited state) to investigate the response to a four fs-pulse train of 1 THz repetition rate. A deep insight about the capture process implied is then obtained, and direct capture from the wetting layer is identified as the dominant mechanism in the high current regime.

Optical amplifiereducation.field_of_studyMaterials sciencebusiness.industryPopulationPhysics::OpticsQuantum dot laserQuantum dotExcited stateOptoelectronicsbusinesseducationUltrashort pulseQuantum wellWetting layer2007 European Conference on Lasers and Electro-Optics and the International Quantum Electronics Conference
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