Title :
Carrier dynamics in self-assembled ErAs nanoislands measured by optical-pump THz-probe spectroscopy
Author :
Prasankumar, R.P. ; Scopatz, A. ; Hilton, D.J. ; Taylor, A.J. ; Averitt, R.D. ; Zide, J.M. ; Gossard, A.C.
Author_Institution :
Condensed Matter & Thermal Phys., Los Alamos Nat. Lab., NM, USA
Abstract :
We use optical-pump THz-probe spectroscopy to study carrier dynamics in self-assembled ErAs:GaAs nanoislands. Sub-picosecond carrier capture times are measured, indicating the potential of these devices as THz detectors comparable to low temperature grown GaAs.
Keywords :
III-V semiconductors; erbium compounds; gallium arsenide; high-frequency effects; island structure; nanostructured materials; self-assembly; semiconductor superlattices; submillimetre wave spectra; ErAs; ErAs-GaAs; GaAs; THz detectors; carrier dynamics; optical-pump THz-probe spectroscopy; self-assembled ErAs:GaAs nanoislands; subpicosecond carrier capture; temperature grown GaAs; Gallium arsenide; Optical devices; Optical pumping; Optical superlattices; Photoconductivity; Self-assembly; Semiconductor superlattices; Spectroscopy; Temperature; Ultrafast optics;
Conference_Titel :
Quantum Electronics and Laser Science Conference, 2005. QELS '05
Print_ISBN :
1-55752-796-2
DOI :
10.1109/QELS.2005.1548811
