Single 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, Hark Hoe Tan, Chennupati Jagadish, Michael B. Johnston*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

89 Citations (Scopus)


Spectroscopy and imaging in the terahertz (THz) region of the electromagnetic spectrum has proven to provide important insights in fields as diverse as chemical analysis, materials characterization, security screening, and nondestructive testing. However, compact optoelectronics suited to the most powerful terahertz technique, time-domain spectroscopy, are lacking. Here, we implement single GaAs nanowires as microscopic coherent THz sensors and for the first time incorporated them into the pulsed time-domain technique. We also demonstrate the functionality of the single nanowire THz detector as a spectrometer by using it to measure the transmission spectrum of a 290 GHz low pass filter. Thus, nanowires are shown to be well suited for THz device applications and hold particular promise as near-field THz sensors.

Original languageEnglish
Pages (from-to)206-210
Number of pages5
JournalNano Letters
Issue number1
Publication statusPublished - 14 Jan 2015


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