Single GaAs/AlGaAs nanowire photoconductive terahertz detectors

Kun Peng*, Patrick Parkinson, Lan Fu, Qiang Gao, Nian Jiang, Ya Nan Guo, Fan Wang, Hannah J. Joyce, Jessica L. Boland, Michael B. Johnston, Hark Hoe Tan, Chennupati Jagadish

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

1 Citation (Scopus)


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.

Original languageEnglish
Title of host publicationCOMMAD 2014
Subtitle of host publicationConference on Optoelectronic and Microelectronic Materials and Devices
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages2
ISBN (Electronic)9781479968688
ISBN (Print)9781479968671
Publication statusPublished - 10 Feb 2014
Externally publishedYes
Event2014 Conference on Optoelectronic and Microelectronic Materials and Devices, COMMAD 2014 - Perth, Australia
Duration: 14 Dec 201417 Dec 2014


Other2014 Conference on Optoelectronic and Microelectronic Materials and Devices, COMMAD 2014


  • nanophotonics
  • nanoscale devices
  • nanowires
  • terahertz detectors


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