Metamaterial-Enhanced Nonlinear Terahertz Spectroscopy
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 hig...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2013-03-01
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| Series: | EPJ Web of Conferences |
| Online Access: | http://dx.doi.org/10.1051/epjconf/20134109005 |
| _version_ | 1818892827392737280 |
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| author | Zhang X. Perkins B. G. Brandt N. C. Sternbach A. Strikwerda A. C. Zhang J. Fan K. Liu M. Hwang H. Y. Averitt R. D. Nelson K. A. |
| author_facet | Zhang X. Perkins B. G. Brandt N. C. Sternbach A. Strikwerda A. C. Zhang J. Fan K. Liu M. Hwang H. Y. Averitt R. D. Nelson K. A. |
| author_sort | Zhang X. |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-19T18:02:53Z |
| format | Article |
| id | doaj.art-dc7b77970f7144afa274f1a7185cde3e |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-12-19T18:02:53Z |
| publishDate | 2013-03-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-dc7b77970f7144afa274f1a7185cde3e2022-12-21T20:11:33ZengEDP SciencesEPJ Web of Conferences2100-014X2013-03-01410900510.1051/epjconf/20134109005Metamaterial-Enhanced Nonlinear Terahertz SpectroscopyZhang X.Perkins B. G.Brandt N. C.Sternbach A.Strikwerda A. C.Zhang J.Fan K.Liu M.Hwang H. Y.Averitt R. D.Nelson K. A.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.http://dx.doi.org/10.1051/epjconf/20134109005 |
| spellingShingle | Zhang X. Perkins B. G. Brandt N. C. Sternbach A. Strikwerda A. C. Zhang J. Fan K. Liu M. Hwang H. Y. Averitt R. D. Nelson K. A. Metamaterial-Enhanced Nonlinear Terahertz Spectroscopy EPJ Web of Conferences |
| title | Metamaterial-Enhanced Nonlinear Terahertz Spectroscopy |
| title_full | Metamaterial-Enhanced Nonlinear Terahertz Spectroscopy |
| title_fullStr | Metamaterial-Enhanced Nonlinear Terahertz Spectroscopy |
| title_full_unstemmed | Metamaterial-Enhanced Nonlinear Terahertz Spectroscopy |
| title_short | Metamaterial-Enhanced Nonlinear Terahertz Spectroscopy |
| title_sort | metamaterial enhanced nonlinear terahertz spectroscopy |
| url | http://dx.doi.org/10.1051/epjconf/20134109005 |
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