Investigation of black phosphorus as a nano-optical polarization element by polarized Raman spectroscopy
Investigation of black phosphorus as a nano-optical polarization element by polarized Raman spectroscopy
复制标题
偏振拉曼光谱研究黑磷作为纳米光学偏振元件
DOI：
10.1007/s12274-017-1690-4
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发表时间：
2018-06-01
期刊：
影响因子：
9.9
通讯作者：
Zhang, Jin
中科院分区：
文献类型：
--
作者：
Mao, Nannan;Zhang, Shishu;Zhang, Jin
在纳米尺度上控制光的偏振对于纳米光学器件的发展至关重要。二维（2D）层状黑磷（BP）由于其波纹蜂窝结构，在可见光区表现出明显的线性二色性和双折射性，这是超薄偏振光学的优越特性。利用偏振拉曼光谱，我们证明了纳米厚度的BP层可以显著改变线性偏振激光器的偏振状态，并通过诱导各向同性Bi2Se3的异常极化拉曼散射，在BP-Bi2Se3堆叠结构中充当超薄光学偏振元件。我们的研究结果为设计基于二维各向异性材料的新型偏振光学器件提供了一种有希望的选择，这种材料可以很容易地集成到微型全光学和光电子器件中。
Manipulating the polarization of light at the nanoscale is essential for the development of nano-optical devices. Owing to its corrugated honeycomb structure, two-dimensional (2D) layered black phosphorus (BP) exhibits outstanding in-plane optical anisotropy with distinct linear dichroism and optical birefringence in the visible region, which are superior characteristics for ultrathin polarizing optics. Herein, taking advantage of polarized Raman spectroscopy, we demonstrate that layered BP with a nanometer thickness can remarkably alter the polarization state of a linearly-polarized laser and behave as an ultrathin optical polarization element in a BP-Bi2Se3 stacking structure by inducing the exceptionally polarized Raman scattering of isotropic Bi2Se3. Our findings provide a promising alternative for designing novel polarization optics based on 2D anisotropic materials, which can be easily integrated in microsized all-optical and optoelectronic devices.