Broadband terahertz polarizers with ideal performance based on aligned carbon nanotube stacks.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 22268490.
- Also identified by DOI 10.1021/nl203783q.
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Abstract
We demonstrate a terahertz polarizer built with stacks of aligned single-walled carbon nanotubes (SWCNTs) exhibiting ideal broadband terahertz properties: 99.9% degree of polarization and extinction ratios of 10(-3) (or 30 dB) from ~0.4 to 2.2 THz. Compared to structurally tuned and fragile wire-grid systems, the performance in these polarizers is driven by the inherent anistropic absorption of SWCNTs that enables a physically robust structure. Supported by a scalable dry contact-transfer approach, these SWCNT-based polarizers are ideal for emerging terahertz applications.
Medical subject headings
- Nanotubes, Carbon
- Optical Devices