Structural tuning of nonlinear terahertz metamaterials using broadside coupled split ring resonators
We present an experimental and numerical study of a terahertz metamaterial with a nonlinear response that is controllable via the relative structural arrangement of two stacked split ring resonator arrays. The first array is fabricated on an n-doped GaAs substrate, and the second array is fabricated...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2021-09-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/5.0053876 |
| _version_ | 1818720585800220672 |
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| author | George R. Keiser Nicholas Karl Sheikh Rubaiat Ul Haque Igal Brener Daniel M. Mittleman Richard D. Averitt |
| author_facet | George R. Keiser Nicholas Karl Sheikh Rubaiat Ul Haque Igal Brener Daniel M. Mittleman Richard D. Averitt |
| author_sort | George R. Keiser |
| collection | DOAJ |
| description | We present an experimental and numerical study of a terahertz metamaterial with a nonlinear response that is controllable via the relative structural arrangement of two stacked split ring resonator arrays. The first array is fabricated on an n-doped GaAs substrate, and the second array is fabricated vertically above the first using a polyimide spacer layer. Due to GaAs carrier dynamics, the on-resonance terahertz transmission at 0.4 THz varies in a nonlinear manner with incident terahertz power. The second resonator layer dampens this nonlinear response. In samples where the two layers are aligned, the resonance disappears, and the total nonlinear modulation of the on-resonance transmission decreases. The nonlinear modulation is restored in samples where an alignment offset is imposed between the two resonator arrays. Structurally tunable metamaterials and metasurfaces can therefore act as a design template for tunable nonlinear THz devices by controlling the coupling of confined electric fields to nonlinear phenomena in a complex material substrate or inclusion. |
| first_indexed | 2024-12-17T20:25:11Z |
| format | Article |
| id | doaj.art-96ea211a80154cb89746670c8b782e0e |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-12-17T20:25:11Z |
| publishDate | 2021-09-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-96ea211a80154cb89746670c8b782e0e2022-12-21T21:33:49ZengAIP Publishing LLCAIP Advances2158-32262021-09-01119095103095103-710.1063/5.0053876Structural tuning of nonlinear terahertz metamaterials using broadside coupled split ring resonatorsGeorge R. Keiser0Nicholas Karl1Sheikh Rubaiat Ul Haque2Igal Brener3Daniel M. Mittleman4Richard D. Averitt5Department of Physics, Washington College, Chestertown, Maryland 21620, USACenter for Integrated Nanotechnologies, Sandia National Laboratories, Albuquerque, New Mexico 87123, USADepartment of Physics, University of California at San Diego, La Jolla, San Diego, California 92093, USACenter for Integrated Nanotechnologies, Sandia National Laboratories, Albuquerque, New Mexico 87123, USASchool of Engineering, Brown University, Providence, Rhode Island 02912, USADepartment of Physics, University of California at San Diego, La Jolla, San Diego, California 92093, USAWe present an experimental and numerical study of a terahertz metamaterial with a nonlinear response that is controllable via the relative structural arrangement of two stacked split ring resonator arrays. The first array is fabricated on an n-doped GaAs substrate, and the second array is fabricated vertically above the first using a polyimide spacer layer. Due to GaAs carrier dynamics, the on-resonance terahertz transmission at 0.4 THz varies in a nonlinear manner with incident terahertz power. The second resonator layer dampens this nonlinear response. In samples where the two layers are aligned, the resonance disappears, and the total nonlinear modulation of the on-resonance transmission decreases. The nonlinear modulation is restored in samples where an alignment offset is imposed between the two resonator arrays. Structurally tunable metamaterials and metasurfaces can therefore act as a design template for tunable nonlinear THz devices by controlling the coupling of confined electric fields to nonlinear phenomena in a complex material substrate or inclusion.http://dx.doi.org/10.1063/5.0053876 |
| spellingShingle | George R. Keiser Nicholas Karl Sheikh Rubaiat Ul Haque Igal Brener Daniel M. Mittleman Richard D. Averitt Structural tuning of nonlinear terahertz metamaterials using broadside coupled split ring resonators AIP Advances |
| title | Structural tuning of nonlinear terahertz metamaterials using broadside coupled split ring resonators |
| title_full | Structural tuning of nonlinear terahertz metamaterials using broadside coupled split ring resonators |
| title_fullStr | Structural tuning of nonlinear terahertz metamaterials using broadside coupled split ring resonators |
| title_full_unstemmed | Structural tuning of nonlinear terahertz metamaterials using broadside coupled split ring resonators |
| title_short | Structural tuning of nonlinear terahertz metamaterials using broadside coupled split ring resonators |
| title_sort | structural tuning of nonlinear terahertz metamaterials using broadside coupled split ring resonators |
| url | http://dx.doi.org/10.1063/5.0053876 |
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