TITLE

Optical injection and detection of ballistic pure spin currents in Ge

AUTHOR(S)
Loren, Eric J.; Ruzicka, Brian A.; Werake, Lalani K.; Zhao, Hui; van Driel, Henry M.; Smirl, Arthur L.
PUB. DATE
August 2009
SOURCE
Applied Physics Letters;8/31/2009, Vol. 95 Issue 9, p092107
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Ballistic pure spin currents are injected into Ge at 295 K using quantum interference between one and two photon absorption processes for 1786 and 893 nm, 200 fs optical pulses. The spin currents are spatially and temporally detected using polarization- and phase-dependent differential transmission techniques with nanometer spatial and femtosecond temporal resolution. We interpret the dynamics in terms of the fast spin relaxation of the holes and intervalley transfer of electrons.
ACCESSION #
44066585

 

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