Dereshgi Sina Abedini, Liu Zizhuo, Aydin Koray
Opt Express. 2020 May 25;28(11):16725-16739. doi: 10.1364/OE.392011.
We present a theoretical study on the plasmonic response of borophene, a monolayer 2D material that is predicted to exhibit metallic response and anisotropic plasmonic behavior in visible wavelengths. We investigate plasmonic properties of borophene thin films as well as borophene nanoribbons and nanopatches where polarization-sensitive absorption values in the order of 50% is obtained with monolayer borophene. It is demonstrated that by adding a metal layer, this absorption can be enhanced to 100%. We also examine giant dichroism in monolayer borophene which can be tuned passively (patterning) and actively (electrostatic gating) and our simulations yield 20% reflected light with significant polarization rotation. These findings reveal the potential of borophene in the manipulation of phase, amplitude and polarization of light at the extreme subwavelength scales.
我们对硼烯的等离子体响应进行了理论研究。硼烯是一种单层二维材料，预计在可见光波长范围内表现出金属响应和各向异性等离子体行为。我们研究了硼烯薄膜以及硼烯纳米带和纳米片的等离子体特性，单层硼烯的偏振敏感吸收值可达50%左右。结果表明，通过添加金属层，这种吸收可增强至100%。我们还研究了单层硼烯中的巨二向色性，它可以通过被动（图案化）和主动（静电门控）方式进行调节，我们的模拟产生了20%的反射光，并伴有显著的偏振旋转。这些发现揭示了硼烯在极亚波长尺度下对光的相位、幅度和偏振进行操控的潜力。
