Broadband Terahertz Polarizers with Ideal Performance Based on Aligned Carbon Nanotube Stacks
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- 作者：Lei Ren ; Cary L. Pint ; Takashi Arikawa ; Kei Takeya ; Iwao Kawayama ; Masayoshi Tonouchi ; Robert H. Hauge ; Junichiro Kono
- 刊名：Nano Letters
- 出版年：2012
- 出版时间：February 8, 2012
- 年：2012
- 卷：12
- 期：2
- 页码：787-790
- 全文大小：328K
- 年卷期：v.12,no.2(February 8, 2012)
- ISSN：1530-6992
文摘
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鈥? (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.