Efficient terahertz emission from InAs nanowires
Abstract
We observe intense pulses of far-infrared electromagnetic radiation emitted from arrays of InAs nanowires. The THz radiation power efficiency of these structures is about 15 times higher compared to a planar InAs substrate. This is explained by the preferential orientation of coherent plasma motion to the wire surface, which overcomes radiation trapping by total-internal reflection. We present evidence that this radiation originates from a low-energy acoustic surface plasmon mode of the nanowire. This is supported by independent measurements of electronic transport on individual nanowires, ultrafast THz spectroscopy and theoretical analysis. Our combined experiments and analysis further indicate that these plasmon modes are specific to high aspect ratio geometries.
Cite
@article{arxiv.1109.0355,
title = {Efficient terahertz emission from InAs nanowires},
author = {Denis V. Seletskiy and Michael P. Hasselbeck and Jeffrey G. Cederberg and Aaron Katzenmeyer and Maria E. Toimil-Molares and François Léonard and A. Alec Talin and Mansoor Sheik-Bahae},
journal= {arXiv preprint arXiv:1109.0355},
year = {2011}
}
Comments
12 pages, 7 figures