Výsledky vyhledávání - "Najmaie, Ali"

Report

Engineering directed excitonic energy transfer

Autor: Perdomo, Alejandro, Vogt, Leslie, Najmaie, Ali, Aspuru-Guzik, Alán

We provide an intuitive platform for engineering exciton transfer dynamics. We show that careful consideration of the spectral density, which describes the system-bath interaction, leads to opportunities to engineer the transfer of an exciton. Since

Externí odkaz: http://arxiv.org/abs/1001.2602

Zobrazit plný text záznamu

Report

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

Zobrazit plný text záznamu

Report

Generation of spin currents via Raman scattering

Autor: Najmaie, Ali, Sherman, E. Ya., Sipe, J. E.

Publikováno v: Phys. Rev. Lett. 95, 056601 (2005)

We show theoretically that stimulated spin flip Raman scattering can be used to inject spin currents in doped semiconductors with spin split bands. A pure spin current, where oppositely oriented spins move in opposite directions, can be injected in z

Externí odkaz: http://arxiv.org/abs/cond-mat/0508230

Zobrazit plný text záznamu

Report

Spin current injection by intersubband transitions in quantum wells

Autor: Sherman, E. Ya., Najmaie, Ali, Sipe, J. E.

Publikováno v: Appl. Phys. Lett. 86, 122103 (2005)

We show that a pure spin current can be injected in quantum wells by the absorption of linearly polarized infrared radiation, leading to transitions between subbands. The magnitude and the direction of the spin current depend on the Dresselhaus and R

Externí odkaz: http://arxiv.org/abs/cond-mat/0502007

Zobrazit plný text záznamu

Report

Pure spin current from one-photon absorption of linearly polarized light in noncentrosymmetric semiconductors

Autor: Bhat, R. D. R., Nastos, F., Najmaie, Ali, Sipe, J. E.

Publikováno v: Phys. Rev. Lett. 94, 096603 (2005)

We show that one-photon absorption of linearly polarized light should produce pure spin currents in noncentrosymmetric semiconductors, including even bulk GaAs. We present 14x14 k.p model calculations of the effect in GaAs, including strain, and pseu

Externí odkaz: http://arxiv.org/abs/cond-mat/0404066

Zobrazit plný text záznamu