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Part 1: Document Description
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Citation |
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Title: |
Replication Data for: Toroidal versus Fano resonances in high Q planar THz metamaterials |
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Identification Number: |
doi:10.21979/N9/5RYPXN |
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Distributor: |
DR-NTU (Data) |
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Date of Distribution: |
2020-05-05 |
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Version: |
1 |
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Bibliographic Citation: |
Gupta, Manoj; Singh, Ranjan, 2020, "Replication Data for: Toroidal versus Fano resonances in high Q planar THz metamaterials", https://doi.org/10.21979/N9/5RYPXN, DR-NTU (Data), V1 |
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Citation |
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Title: |
Replication Data for: Toroidal versus Fano resonances in high Q planar THz metamaterials |
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Identification Number: |
doi:10.21979/N9/5RYPXN |
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Authoring Entity: |
Gupta, Manoj (Nanyang Technological University) |
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Singh, Ranjan (Nanyang Technological University) |
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Software used in Production: |
CST |
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Software used in Production: |
Comsol |
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Software used in Production: |
OriginPro |
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Software used in Production: |
Matlab |
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Grant Number: |
MOE2015-T2-2-103 |
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Grant Number: |
RG105/15 |
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Grant Number: |
MOE2011‐T3‐1‐005 |
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Grant Number: |
RG124/14 |
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Grant Number: |
START-UP GRANT |
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Distributor: |
DR-NTU (Data) |
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Access Authority: |
Gupta, Manoj |
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Access Authority: |
Singh, Ranjan |
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Depositor: |
Gupta, Manoj |
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Date of Deposit: |
2020-05-05 |
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Holdings Information: |
https://doi.org/10.21979/N9/5RYPXN |
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Study Scope |
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Keywords: |
Physics, Physics, Terahertz metamaterial, Toroidal dipole, Fano, Figure of merit |
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Abstract: |
Radiative losses are crucial in optimizing the performance of metamaterial based devices across the electromagnetic spectrum. Introducing structural asymmetry in meta-atom design leads to the excitation of sharp Fano resonances with reduced radiative losses. However, at larger asymmetries, the Fano resonance becomes highly radiative which results in the broadening of the asymmetric line shaped resonances. Here, we experimentally demonstrate a scheme to couple mirrored asymmetric Fano resonators through interaction of anti-aligned magnetic dipoles which results in a strong toroidal resonance in two-dimensional planar metasurface. The quality (Q) factor and the figure of merit of the toroidal dipolar mode is significantly higher than the Fano resonance. Moreover, we discover that the exponential decay of the Q factor of toroidal resonance mode occurs at half the rate of that in the Fano resonance as the asymmetry of the system is enhanced which indicates significant tailoring and the suppression of the radiative loss channel in the toroidal configuration. The weakly-radiative toroidal resonance in planar metamaterials offers the potential for applications in terahertz and optical sensing, spectroscopy, narrow-band filtering and large modulation. |
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Kind of Data: |
Research data |
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Methodology and Processing |
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Sources Statement |
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Data Access |
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Other Study Description Materials |
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Related Publications |
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Citation |
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Identification Number: |
10.1002/adom.201600553 |
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Bibliographic Citation: |
Gupta, M., & Singh, R. (2016). Toroidal versus Fano resonances in high Q planar THz metamaterials. Advanced Optical Materials, 4(12), 2119-2125. |
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Citation |
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Identification Number: |
10356/85846 |
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Bibliographic Citation: |
Gupta, M., & Singh, R. (2016). Toroidal versus Fano resonances in high Q planar THz metamaterials. Advanced Optical Materials, 4(12), 2119-2125. |
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