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Dynamical Electric and Magnetic Metamaterial Response at Terahertz Frequencies
Abstract
Utilizing terahertz time domain spectroscopy, we have characterized the electromagnetic response of a planar array of split ring resonators (SRRs) fabricated upon a high resistivity GaAs substrate. The measured frequency dependent magnetic and electric resonances are in excellent agreement with theory and simulation. For two polarizations, the SRRs yield a negative electric response (epsilon < 0). We demonstrate, for the first time, dynamical control of the electrical response of the SRRs through photoexcitation of free carriers in the substrate. An excited carrier density of approximately 4 x 10(16) cm(-3) is sufficient to short the gap of the SRRs, thereby turning off the electric resonance, demonstrating the potential of such structures as terahertz switches. Because of the universality of metamaterial response over many decades of frequency, these results have implications for other regions of the electromagnetic spectrum.
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Cites
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Cited by
Active terahertz metamaterial devices
Chen, H.-T., Padilla, W. J., Zide, J. M. O., Gossard, A. C., Taylor, A. J., & Averitt, R. D. (2006) · Nature · doi:10.1038/nature05343 · Cited by 2,383
Self-citationTerahertz spectroscopy and imaging - Modern techniques and applications
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Second-Harmonic Generation from Magnetic Metamaterials
Klein, M. W., Enkrich, C., Wegener, M., & Linden, S. (2006) · Science · doi:10.1126/science.1129198 · Cited by 762
Thin-film sensing with planar terahertz metamaterials: sensitivity and limitations
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Self-citationNegative refractive index metamaterials
Padilla, W. J., Basov, D. N., & Smith, D. R. (2006) · Materials Today · doi:10.1016/s1369-7021(06)71573-5 · Cited by 448
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Metadata
- Authors
- Padilla, W. J., Taylor, A. J., Highstrete, C., Lee, M., & Averitt, R. D.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2006-03-13
- Volume
- 96
- Issue
- 10
- Pages
- 107401-107401
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2013718124
- Cited by
- 868
- References
- 1
- FWCI
- 26.83
- Type
- journal article
- Language
- en
- Open access
- closed
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