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.
| Original language | English (US) |
|---|---|
| Title of host publication | 18th International Conference on Ultrafast Phenomena, UP 2012 |
| DOIs | |
| State | Published - Apr 5 2013 |
| Event | 18th International Conference on Ultrafast Phenomena, UP 2012 - Lausanne, Switzerland Duration: Jul 8 2012 → Jul 13 2012 |
Publication series
| Name | EPJ Web of Conferences |
|---|---|
| Volume | 41 |
| ISSN (Print) | 2101-6275 |
| ISSN (Electronic) | 2100-014X |
Other
| Other | 18th International Conference on Ultrafast Phenomena, UP 2012 |
|---|---|
| Country | Switzerland |
| City | Lausanne |
| Period | 7/8/12 → 7/13/12 |
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Metamaterial-enhanced nonlinear terahertz spectroscopy. / Hwang, H. Y.; Liu, M.; Fan, K.; Zhang, J.; Strikwerda, A. C.; Sternbach, A.; Brandt, Nathaniel C; Perkins, B. G.; Zhang, X.; Averitt, R. D.; Nelson, K. A.
18th International Conference on Ultrafast Phenomena, UP 2012. 2013. 09005 (EPJ Web of Conferences; Vol. 41).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
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TY - GEN
T1 - Metamaterial-enhanced nonlinear terahertz spectroscopy
AU - Hwang, H. Y.
AU - Liu, M.
AU - Fan, K.
AU - Zhang, J.
AU - Strikwerda, A. C.
AU - Sternbach, A.
AU - Brandt, Nathaniel C
AU - Perkins, B. G.
AU - Zhang, X.
AU - Averitt, R. D.
AU - Nelson, K. A.
PY - 2013/4/5
Y1 - 2013/4/5
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84875640853&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84875640853&partnerID=8YFLogxK
U2 - 10.1051/epjconf/20134109005
DO - 10.1051/epjconf/20134109005
M3 - Conference contribution
SN - 9782759809561
T3 - EPJ Web of Conferences
BT - 18th International Conference on Ultrafast Phenomena, UP 2012
ER -