Tri-phase all-optical switching and broadband nonlinear optical response in Bi2Se3 nanosheets
Tri-phase all-optical switching and broadband nonlinear optical response in Bi2Se3 nanosheets
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Bi2Se3 纳米片中的三相全光开关和宽带非线性光学响应
DOI：
10.1364/oe.25.018346
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发表时间：
2017-07-24
期刊：
影响因子：
3.8
通讯作者：
He, Jun
中科院分区：
文献类型：
--
作者：
Li, Xiaohong;Liu, Runkai;He, Jun
本文描述了 Bi2Se3 纳米片中的三相全光开关和宽带非线性光学响应。以Bi2Se3纳米片分散液为样品，通过改变受控光的入射强度，可以将受控光的空间相位调制为三相（不变、聚焦、衍射）。推测其机理是控制光改变重叠区域的相位分布，进而调制受控光的相位分布。基于Gerchberg-Saxton算法，从传输模式中检索控制光和受控光的相位分布。在动态空间自相位调制（SSPM）实验中，还可以观察到自聚焦、自衍射环形成和自衍射环变形三个过程。此外，在350 nm至1160 nm的典型波长下测量了控制光的SSPM，这表明这种全光开关在宽带范围内是可用的。这些结果提供了 Bi2Se3 作为各种光电应用的全光开关的巨大潜力。 (C) 2017年美国光学学会
This paper describes the tri-phase all-optical switching and broadband nonlinear optical response in Bi2Se3 nanosheets. Using Bi2Se3 nanosheets dispersion solution as the sample, the spatial phase of controlled light can be modulated as three phases (unchanging, focusing, diffraction) by changing the incident intensity of controlling light. The mechanism is conjectured that the controlling light changes the phase distribution of overlapping region and then modulates the phase distribution of the controlled light. Based on Gerchberg-Saxton algorithm, the phase distribution of the controlling light and controlled light is retrieved from the transmitted patterns. In dynamic spatial self-phase modulation (SSPM) experiment, the three processes including self-focusing, self-diffraction ring formation, and self-diffraction ring deformation can also be observed. In addition, the SSPM of controlling light is measured at the typical wavelengths from 350 nm to 1160 nm, which demonstrates that this all-optical switching is available in broadband. These results provide the great potential of Bi2Se3 as an all-optical switching for various optoelectronic applications. (C) 2017 Optical Society of America