Zobrazeno 1 - 10
of 29
pro vyhledávání: '"Werake, Lalani K."'
Autor:
Ruzicka, Brian A., Werake, Lalani K., Xu, Guowei, Khurgin, Jacob B., Sherman, E. Ya., Wu, Judy Z., Zhao, Hui
Publikováno v:
Phys. Rev. Lett. 108, 077403 (2012)
We demonstrate a new, nonlinear optical effect of electric currents. First, a steady current is generated by applying a voltage on a doped GaAs crystal. We demonstrate that this current induces second-harmonic generation of a probe laser pulse. Secon
Externí odkaz:
http://arxiv.org/abs/1112.5140
Publikováno v:
Phys. Rev. Lett. 106, 107205 (2011)
We report observation of intrinsic inverse spin Hall effect in un-doped GaAs multiple quantum wells with a sample temperature of 10 K. A transient ballistic pure spin current is injected by a pair of laser pulses through quantum interference. By time
Externí odkaz:
http://arxiv.org/abs/1102.1958
Autor:
Werake, Lalani K., Zhao, Hui
Publikováno v:
Nat. Phys. 6, 875 (2010)
Extensive efforts are currently being devoted to developing a new electronic technology, called spintronics, where the spin of electrons is explored to carry information. [1,2] Several techniques have been developed to generate pure spin currents in
Externí odkaz:
http://arxiv.org/abs/1102.1784
Publikováno v:
Appl. Phys. Lett. 97, 262119 (2010)
The ambipolar carrier diffusion in bulk GaAs is studied by using an ultrafast pump-probe technique with a high spatial resolution. Carriers with a point-like spatial profile are excited by a tightly focused pump laser pulse. The spatiotemporal dynami
Externí odkaz:
http://arxiv.org/abs/1102.1366
Publikováno v:
Phys. Rev. B 82, 195414 (2010)
We report an optical study of charge transport in graphene. Diffusion of hot carriers in epitaxial graphene and reduced graphene oxide samples are studied using an ultrafast pump-probe technique with a high spatial resolution. Spatiotemporal dynamics
Externí odkaz:
http://arxiv.org/abs/1005.3850
Publikováno v:
Appl. Phys. Lett. 96, 173106 (2010)
The dynamics of photocarriers in reduced graphene oxide thin films is studied by using ultrafast pump-probe spectroscopy. Time dependent differential transmissions are measured with sample temperatures ranging from 9 to 300 K. At each sample temperat
Externí odkaz:
http://arxiv.org/abs/1003.1972
Publikováno v:
Phys. Rev. B 78, 045314 (2008)
Sub-picosecond ac spin current pulses are generated optically in GaAs bulk and quantum wells at room temperature and 90K through quantum interference between one-photon and two-photon absorptions driven by two phase-locked ultrafast laser pulses that
Externí odkaz:
http://arxiv.org/abs/0806.3901
Autor:
Werake, Lalani K.1, Hui Zhao1 huizhao@ku.edu
Publikováno v:
Nature Physics. Nov2010, Vol. 6 Issue 11, p875-878. 4p. 1 Diagram, 2 Graphs.
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Akademický článek
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