Single nanowire photoconductive terahertz detectors
Date
2015
Authors
Peng, Kun
Parkinson, Patrick
Fu, Lan
Gao, Qiang
Jiang, Nian
Guo, Ya-Nan
Wang, Fan
Joyce, Hannah J
Boland, Jessica L
Tan, Hark Hoe
Journal Title
Journal ISSN
Volume Title
Publisher
American Chemical Society
Abstract
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.
Description
Keywords
nanowire, nano-optics, terahertz optoelectronics, ultrafast
Citation
Collections
Source
Nano Letters
Type
Journal article