Transient carrier transport phenomena in an In0.53Ga 0.47As-based p-i-n semiconductor nanostructure have been studied by using subpicosecond transient/time-resolved Raman spectroscopy. We observe an instability of the GaAs-like optical phonon population in this nanostructure semiconductor that occurs when electrons are accelerated to very high velocities by the application of intense electric fields. The results open up a new channel for creating coherent THz frequency that can be used in THz electronic devices. We suggest that the observed phenomena will have enormous impact on the carrier dynamics and carrier transport in nanoscale semiconductor electronic devices.
|Original language||English (US)|
|Number of pages||14|
|Journal||Journal of Physics Condensed Matter|
|State||Published - Aug 30 2006|
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics