Title :
Polarisation-sensitive terahertz detectors
Author :
Johnston, M.B. ; Castro-Camus, E. ; Lloyd-Hughes, J. ; Fraser, M.D. ; Tan, H.H. ; Jagadish, C.
Author_Institution :
Dept. of Phys., Oxford Univ., UK
Abstract :
We have developed a detector of coherent terahertz (THz) radiation that can recover the full polarisation state of a THz transient. The device is a three-contact photoconductive receiver, which is capable of recording two time-varying electric field components of a THz pulse simultaneously. Our receiver was fabricated on Fe+ implanted InP and showed a cross-polarised extinction ratio greater than 100:1. The detector will be useful for spectroscopy of birefringent and optically active materials.
Keywords :
birefringence; indium compounds; optical materials; photoconductivity; polarisation; submillimetre wave detectors; submillimetre wave receivers; submillimetre wave spectroscopy; submillimetre waves; Fe+; InP; THz transient; birefringent material; coherent terahertz radiation; cross-polarised extinction ratio; iron ion implanted InP; optically active material; photoconductive receiver; polarisation state; polarisation-sensitive terahertz detector; time-varying electric field recording; Extinction ratio; Indium phosphide; Iron; Optical pulses; Optical receivers; Optical recording; Photoconducting devices; Polarization; Radiation detectors; Spectroscopy;
Conference_Titel :
Infrared and Millimeter Waves and 13th International Conference on Terahertz Electronics, 2005. IRMMW-THz 2005. The Joint 30th International Conference on
Print_ISBN :
0-7803-9348-1
DOI :
10.1109/ICIMW.2005.1572675
