@inproceedings{6a62d5aa99764c9286e168e49ec9c6ae,
title = "Metamaterial-enhanced nonlinear terahertz spectroscopy",
abstract = "We demonstrate large nonlinear terahertz responses in the gaps of metamaterial split ring resonators in several materials and use nonlinear THz transmission and THz-pump/THz-probe spectroscopy to study the nonlinear responses and dynamics. We use the field enhancement in the SRR gaps to initiate high-field phenomena at lower incident fields. In vanadium dioxide, we drive the insulator-to-metal phase transition with high-field THz radiation. The film conductivity increases by over two orders of magnitude and the phase transition occurs on a several picosecond timescale. In gallium arsenide, we observe high-field transport phenomena, including mobility saturation and impact ionization. The carrier density increases by up to ten orders of magnitude at high fields. At the highest fields, we demonstrate THz-induced damage in both vanadium dioxide and gallium arsenide.",
author = "Hwang, {H. Y.} and M. Liu and K. Fan and J. Zhang and Strikwerda, {A. C.} and A. Sternbach and Brandt, {N. C.} and Perkins, {B. G.} and X. Zhang and Averitt, {R. D.} and Nelson, {K. A.}",
year = "2013",
doi = "10.1051/epjconf/20134109005",
language = "English (US)",
isbn = "9782759809561",
series = "EPJ Web of Conferences",
booktitle = "18th International Conference on Ultrafast Phenomena, UP 2012",
note = "18th International Conference on Ultrafast Phenomena, UP 2012 ; Conference date: 08-07-2012 Through 13-07-2012",
}