Picosecond time-resolved two-dimensional ballistic electron transport

Details Picosecond time-resolved two-dimensional ballistic electron transport Picosecond time-resolved two-dimensional ballistic electron transport

2003-08-22

arxiv.org/abs/cond-mat/0308460v3

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures, submitted to PRL

Scientific paper

10.1103/PhysRevLett.93.037402

Time-resolved transport of ballistic electrons in a two-dimensional electron gas has been measured with a resolution of less than 5ps. This was accomplished by using picosecond electrical pulses to launch electrons from the emitter of a transverse magnetic focusing structure and optoelectronically sampling the collector voltage. Both plasma resonances and the ballistic transport signal are clearly resolved. The transit time appears to be somewhat longer than expected from simple Fermi velocity considerations.

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