Title :
Coherently controlled femtosecond current dynamics in GaAs observed by near field THz sampling
Author :
Cote, D. ; Laman, N. ; Sipe, J.E. ; van Driel, H.M.
Author_Institution :
Toronto Univ., Ont., Canada
Abstract :
Summary form only given. Coherent control is an all-optical process that allows for generation and optical phase control of electrical currents in a semiconductor on a femtosecond time scale. Here we report the direct observation of currents generated in a semiconductor by phase-related 120 fs pulses. This is done by sampling the near-field THz emission via electrooptic sampling. We observe the surge associated with current injection, and its evolution due to an interplay between momentum relaxation and electron hole interaction.
Keywords :
III-V semiconductors; electro-optical effects; gallium arsenide; high-speed optical techniques; submillimetre wave measurement; GaAs; all-optical process; coherently controlled femtosecond current dynamics; current injection; electrical currents; electron hole interaction; electrooptic sampling; femtosecond time scale; momentum relaxation; near field THz sampling; near-field THz emission; optical phase control; phase-related fs pulses; semiconductor; DC generators; Gallium arsenide; Optical control; Optical pulse generation; Optical variables control; Phase control; Sampling methods; Stimulated emission; Surges; Ultrafast optics;
Conference_Titel :
Quantum Electronics and Laser Science Conference, 2000. (QELS 2000). Technical Digest
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
1-55752-608-7
