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Functionalization of Single-walled Carbon Nanotubes with Thermo-reversible Block Copolymers and Characterization by Small-angle Neutron Scattering
Published on: June 1, 2016
Carbon nanotube terahertz polarizer
Lei Ren1, Cary L Pint, Layla G Booshehri
1Department of Electrical and Computer Engineering, Rice University, Houston, Texas 77005, USA.
Nano Letters
|June 5, 2009
Summary
A novel film of highly aligned single-walled carbon nanotubes functions as an exceptional terahertz linear polarizer. This material exhibits near-perfect alignment and anisotropic terahertz response, demonstrating its potential for advanced optical applications.
Area of Science:
- Materials Science
- Optics and Photonics
- Nanotechnology
Background:
- Single-walled carbon nanotubes (SWCNTs) possess unique electronic and optical properties.
- Developing materials for efficient terahertz (THz) wave manipulation is crucial for advanced applications.
- Achieving high alignment in nanomaterials is key to anisotropic optical responses.
Purpose of the Study:
- To investigate the terahertz linear polarizing capabilities of highly aligned single-walled carbon nanotube films.
- To quantify the degree of alignment and anisotropic terahertz response of the SWCNT film.
- To demonstrate the potential of SWCNT films as terahertz optical components.
Main Methods:
- Fabrication of a film with highly aligned single-walled carbon nanotubes.
- Measurement of terahertz wave transmission and polarization through the SWCNT film.
- Calculation of reduced linear dichroism and nematic order parameter from experimental data.
Main Results:
- The SWCNT film demonstrated excellent terahertz linear polarization performance.
- Virtually no attenuation was observed when THz polarization was perpendicular to the nanotube axis.
- A reduced linear dichroism of 3 was calculated, indicating a nematic order parameter of 1 (near-perfect alignment).
Conclusions:
- Highly aligned SWCNT films exhibit intrinsic anisotropic terahertz response.
- These films serve as highly effective terahertz linear polarizers.
- The demonstrated alignment and polarization properties highlight the potential of SWCNTs in terahertz optics.
