Optical polarizer made of uniaxially aligned short single-wall carbon nanotubes embedded in a polymer film
Optical polarizer made of uniaxially aligned short single-wall carbon nanotubes embedded in a polymer film
复制标题
DOI：
10.1103/physrevb.77.153407
复制
发表时间：
2008-04
影响因子：
3.7
通讯作者：
S. Shoji;Hidemasa Suzuki;R. Zaccaria;Z. Sekkat;S. Kawata
中科院分区：
文献类型：
--
作者：
S. Shoji;Hidemasa Suzuki;R. Zaccaria;Z. Sekkat;S. Kawata
碳纳米管CNT是碳的同素异形体，其固有特性是一维各向异性。它源于分子独特的几何形状，并体现在它们的电、热、机械和光学特性中。在这里，我们报道了一种有效利用碳纳米管的各向异性的光学偏振器。我们制造的偏光片由嵌入聚合物薄膜中的单轴排列碳纳米管制成。由于等离子激元产生的宽吸收光谱和单壁碳纳米管SWCNT的强光学各向异性，该薄膜表现出90%的偏振度，同时在350至800 nm的光谱区域保持平坦的透射率。为了有效地获得排列良好的碳纳米管，我们使用缩短至长度小于200纳米的单壁碳纳米管。我们还观察到范霍夫奇点波长处的偏振度增强。
An intrinsic characteristic of carbon nanotubes CNTs, which are allotropes of carbon, is one-dimensional anisotropy. It is derived from the peculiar geometrical shape of the molecules and is manifested in their electrical, thermal, mechanical, and optical properties. Here, we report an optical polarizer that makes effective use of such anisotropy of CNTs. The polarizer we fabricated is made of uniaxially aligned CNTs embedded in a polymer film. Thanks to the plasmon-originated broad absorption spectrum and strong optical anisotropy of single-wall CNTs SWCNTs, the film exhibits a degree of polarization of 90% with keeping flat transmittance through the spectral region from 350 to 800 nm. In order to efficiently obtain well-aligned CNTs, we used SWCNTs shortened into a length of less than 200 nm. We also observed enhancement of the degree of polarization at the wavelengths of Van Hove singularities.