Výsledky vyhledávání - "Van Driel, H. M."

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THz emission from ultrafast optical orientation

Autor: Nastos, F., Newson, R. W., Hübner, J., Sipe, J. E., van Driel, H. M.

We show both theoretically and experimentally that the magnetization density accompanying ultrafast excitation of a semiconductor with circular polarized light varies rapidly enough to produce a detectable THz field.

Externí odkaz: http://arxiv.org/abs/0705.0870

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Ultrafast extrinsic spin-Hall currents

Autor: Sherman, E. Ya., Najmaie, Ali, van Driel, H. M., Smirl, Arthur L., Sipe, J. E.

Publikováno v: Research Paper, Solid State Commun. 139, 439 (2006)

We consider the possibility of ultrafast extrinsic spin-Hall currents, generated by skew scattering following the optical injection of charge or pure spin currents. We propose a phenomenological model for this effect in quantum well structures. An in

Externí odkaz: http://arxiv.org/abs/cond-mat/0606725

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Ultrafast Deflection of Spatial Solitons in AlGaAs Slab Waveguides

Autor: Hübner, J., Aitchison, J. S., van Driel, H. M.

We demonstrate ultrafast all-optical deflection of spatial solitons in an AlGaAs slab waveguide using 190 fs, 1550 nm pulses which are used to generate and deflect the spatial soliton. The steering beam is focused onto the top of the waveguide near t

Externí odkaz: http://arxiv.org/abs/physics/0509002

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Two-photon spin injection in semiconductors

Autor: Bhat, R. D. R., Nemec, P., Kerachian, Y., van Driel, H. M., Sipe, J. E., Smirl, Arthur L.

Publikováno v: Phys. Rev. B 71, 035209 (2005) (12 pages)

A comparison is made between the degree of spin polarization of electrons excited by one- and two-photon absorption of circularly polarized light in bulk zincblende semiconductors. Time- and polarization-resolved experiments in (001)-oriented GaAs re

Externí odkaz: http://arxiv.org/abs/cond-mat/0408386

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