Gallium Phosphide Nanowires in a Free-Standing, Flexible, and Semitransparent Membrane for Large-Scale Infrared-to-Visible Light Conversion
Gallium Phosphide Nanowires in a Free-Standing, Flexible, and Semitransparent Membrane for Large-Scale Infrared-to-Visible Light Conversion
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DOI：
10.1021/acsnano.0c04872
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发表时间：
2020-08-25
期刊：
影响因子：
17.1
通讯作者：
Mukhin, Ivan S.
中科院分区：
文献类型：
--
作者：
Fedorov, Vladimir V.;Bolshakov, Alexey;Mukhin, Ivan S.
纳米结构的非线性光学响应工程是纳米光子学的关键课题之一，因为它允许在纳米尺度上进行宽频率转换。然而，开发设计的应用受到制造成本高或转换效率低的限制。本文报道了封装在聚合物膜中的独立GaP纳米线阵列的高效二次谐波产生。光耦合与光学共振和场约束在纳米irk中，加上GaP材料的高非线性，产生了强的二次谐波信号和有效的近红外（800-1200 nm）到可见光的上转换。制备的纳米线薄膜对入射红外辐射具有高灵活性和半透明性，允许利用它们进行红外成像，这可以很容易地集成到不同的光学方案中，而不会干扰可视化光束。
Engineering of nonlinear optical response in nanostructures is one of the key topics in nanophotonics, as it allows for broad frequency conversion at the nanoscale. Nevertheless, the application of the developed designs is limited by either high cost of their manufacturing or low conversion efficiencies. This paper reports on the efficient second-harmonic generation in a free-standing GaP nanowire array encapsulated in a polymer membrane. Light coupling with optical resonances and field confinement in the nanol irk together with high nonlinearity of GaP material yield a strong second-harmonic signal and efficient near-infrared (800-1200 nm) to visible upconversion. The fabricated nanowire-based membranes demonstrate high flexibility and semitransparency for the incident infrared radiation, allowing utilizing them for infrared imaging, which can be easily integrated into different optical schemes without disturbing the visualized beam.