Abstract
Analysis of the performance characteristics of low-temperature-grown GaAs (LT-GaAs) and detailed characterisation of undoped and Be-doped LT-In0.53Ga0.47As-In0 52Al0.48 As structures is undertaken in order to correlate the structural point defect behaviour with obtained electrical, optical and THz properties. By a judicious combination of doping and annealing temperatures, materials with sub-picosecond lifetimes and resistivity of ~1×107 ohm/square have been obtained on LT-In0.53Ga0.47As-In0.52Al0.48As with THz performances that include sub-picosecond recombination times and over 50dB THz power spectrum dynamic range. The LT-In0.53Ga0.47As-In0.52Al0.48As system shows promise for next generation efficient and portable all-fibre THz imaging systems.
Original language | English |
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Title of host publication | Handbook of Terahertz Technology for Imaging, Sensing and Communications |
Editors | Daryoosh Saeedkia |
Publisher | Elsevier BV |
Chapter | 16 |
Pages | 464-489 |
Number of pages | 26 |
ISBN (Electronic) | 9780857096494 |
ISBN (Print) | 9780857092359 |
DOIs | |
Publication status | Published - 16 Jan 2013 |
Keywords
- Epitaxy
- LT-GaAs
- LT-InGaAs-InAlAs
- Photoconductive switches
- Photomixers
- THz