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Nonlinear charge spreading visualized in voltage-controlled lateral superlattices | | J Krauss
; A Wixforth
; A V Kalameitsev
; A O Govorov
; W Wegscheider
; J P Kotthaus
; | | Date: |
21 Jan 2002 | | Journal: | Phys Rev Lett, 88 (3), 036803 | | Abstract: | Voltage-controlled lateral potential superlattices are used to dramatically increase the lifetime of photogenerated carriers in a quantum well. These long lifetimes, together with the ability to deliberately trigger radiative recombination, enable us to directly visualize the spreading character of nonlinear Maxwell relaxation of 2D charges along narrow channels. Our system allows for temporal and spatial resolution of Maxwell kinetics, usually a very fast process and difficult to observe. The observed spreading dynamics of a 2D hole plasma is in perfect agreement with our nonlinear model. | | Source: | PubMed, pmid11801078 | | Services: | Forum | Review | Favorites | |
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