Journal
APPLIED PHYSICS LETTERS
Volume 86, Issue 20, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1923174
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We use optical-pump terahertz (THz)-probe spectroscopy to study carrier dynamics in self-assembled ErAs nanoislands embedded in GaAs and deposited in a superlattice structure. Measurements are performed at several pump fluences on samples with different superlattice periods, enabling a determination of the time-dependent conductivity. Subpicosecond carrier capture times are obtained, indicating the potential of these devices as time-domain THz detectors with performance comparable to low-temperature grown GaAs and superior control of material parameters. (c) 2005 American Institute of Physics.
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