Tunable optical properties of multilayer black phosphorus thin films
Tunable optical properties of multilayer black phosphorus thin films
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DOI：
10.1103/physrevb.90.075434
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发表时间：
2014-08-27
影响因子：
3.7
通讯作者：
Neto, A. H. Castro
中科院分区：
文献类型：
--
作者：
Low, Tony;Rodin, A. S.;Neto, A. H. Castro
黑磷薄膜可能为中红外到近红外频率的光电子学提供窄隙化合物半导体的有吸引力的替代品。在本工作中，我们使用Kubo公式在有效低能哈密顿量范围内计算多层黑磷薄膜的光学电导张量。多层黑磷的光吸收光谱随厚度、掺杂和光偏振态的变化而敏感。结合从红外吸收光谱获得的实验光谱，我们还讨论了所观察到的各向异性吸收光谱的带间耦合和无序的作用。
Black phosphorus thin films might offer attractive alternatives to narrow-gap compound semiconductors for optoelectronics across mid- to near-infrared frequencies. In this work, we calculate the optical conductivity tensor of multilayer black phosphorus thin films using the Kubo formula within an effective low-energy Hamiltonian. The optical absorption spectra of multilayer black phosphorus are shown to vary sensitively with thickness, doping, and light polarization. In conjunction with experimental spectra obtained from infrared absorption spectroscopy, we also discuss the role of interband coupling and disorder on the observed anisotropic absorption spectra.