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Updated: Jan 26, 2026
11:09
Grafting Multiwalled Carbon Nanotubes with Polystyrene to Enable Self-Assembly and Anisotropic Patchiness
Published on: April 1, 2018
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Tunable Hyperbolic Metamaterials Based on Self-Assembled Carbon Nanotubes
John Andris Roberts1, Shang-Jie Yu2, Po-Hsun Ho2,3
1Department of Applied Physics , Stanford University , Stanford , California 94305 , United States.
Nano Letters
|April 6, 2019
Summary
Single-walled carbon nanotube films function as tunable hyperbolic metamaterials. These materials exhibit ultrasubwavelength properties and support strong light localization, paving the way for advanced optical applications.
Area of Science:
- Materials Science
- Nanotechnology
- Optics and Photonics
Background:
- Single-walled carbon nanotubes (SWCNTs) offer unique electronic and optical properties.
- Metamaterials provide novel ways to control light propagation.
- Anisotropic optical responses are crucial for advanced photonic devices.
Purpose of the Study:
- To demonstrate that horizontally aligned SWCNT films act as hyperbolic metamaterials.
- To investigate the optical properties and tunability of these SWCNT-based metamaterials.
- To explore light-matter interactions in the deep subwavelength regime.
Main Methods:
- Mueller matrix ellipsometry was used to characterize optical properties.
- Doping level dependence of optical properties was investigated.
- Nanofabrication techniques (etching into nanoribbons) were employed to study plasmon modes.
- Comparison with theoretical models validated experimental findings.
Main Results:
- Horizontally aligned SWCNT films exhibit hyperbolic metamaterial behavior.
- A broadband hyperbolic region tunable in the mid-infrared was identified.
- Etching into nanoribbons revealed strong light localization due to hyperbolic plasmon modes.
- Experimental data agreed with theoretical models, confirming nanoscale anisotropic responses.
Conclusions:
- Packed SWCNT films are effective hyperbolic metamaterials with tunable optical properties.
- These materials demonstrate strong light localization capabilities.
- SWCNT films are promising for thermal emission, photodetection, and fundamental studies of subwavelength light-matter interactions.
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