Single GaAs/AlGaAs nanowire photoconductive terahertz detectors
- Peng, K
- Parkinson, P
- Fu, L
- Gao, Q
- Jiang, N
- Guo, YN
- Wang, F
- Joyce, HJ
- Boland, JL
- Johnston, MB
- Tan, HH
- Jagadish, C
Publication date
February 2014
DOI Publisher
Institute of Electrical and Electronics Engineers (IEEE)Abstract
© 2014 IEEE. Photoconductive terahertz detectors based on single GaAs/AlGaAs core-shell nanowire have been designed and fabricated. The devices were characterised in a terahertz time-domain spectroscopy system, showing excellent sensitivity comparable to the standard bulk ion-implanted InP receiver, with a detection bandwidth of 0.1 ∼ 0.6 THz. Finite-difference time-domain simulations were performed to understand the origin of the narrow bandwidth of current detectors as well as optimize antenna designs to improve detector performance
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