Accession Number:
ADP011737
Title:
Frequency Difference Generation in the Terahertz Region Using LTG-GaAs Photodetector
Descriptive Note:
Corporate Author:
UNIVERSITE DU LITTORAL DUNKERQUE (FRANCE) LAB DE PHYSIQUE DES COMPOSANTS DE L'ATMOSPHERE
Personal Author(s):
Report Date:
2000-09-29
Pagination or Media Count:
4.0
Abstract:
We demonstrated Terahertz generation by optical frequency difference with a continuous tuning between 0.2 1 micro W and 3 THz 1 nW. To this aim, high speed photodetectors with an interdigited photoconductor scheme on a submicron scale, loaded by THz log-periodic antennas, were deposited on a 1 micrometer-thick Low Temperature Grown 200 deg C GaAs epilayer. Two TiSapphire laser beams 30 mW focused onto the device yield Terahertz radiation collimated through Silicon lens and detected by means of lock-in bolometer detection. The generated power and frequency, consistent with semiconductor and circuit time constants, are discussed in the prospects of antenna arrays and optical cavities.
Descriptors:
Subject Categories:
- Lasers and Masers
- Optics