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Visualization of Directional Beaming of Weakly Localized Raman from a Random Network of Silicon Nanowires
Advanced Science ( IF 14.3 ) Pub Date : 2021-05-09 , DOI: 10.1002/advs.202100139 Maria J Lo Faro 1, 2, 3 , Giovanna Ruello 3 , Antonio A Leonardi 1, 2, 3 , Dario Morganti 1, 3 , Alessia Irrera 3 , Francesco Priolo 1 , Sylvain Gigan 4 , Giorgio Volpe 3, 5 , Barbara Fazio 3
Advanced Science ( IF 14.3 ) Pub Date : 2021-05-09 , DOI: 10.1002/advs.202100139 Maria J Lo Faro 1, 2, 3 , Giovanna Ruello 3 , Antonio A Leonardi 1, 2, 3 , Dario Morganti 1, 3 , Alessia Irrera 3 , Francesco Priolo 1 , Sylvain Gigan 4 , Giorgio Volpe 3, 5 , Barbara Fazio 3
Affiliation
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Disordered optical media are an emerging class of materials that can strongly scatter light. These materials are useful to investigate light transport phenomena and for applications in imaging, sensing and energy storage. While coherent light can be generated using such materials, its directional emission is typically hampered by their strong scattering nature. Here, the authors directly image Rayleigh scattering, photoluminescence and weakly localized Raman light from a random network of silicon nanowires via real-space microscopy and Fourier imaging. Direct imaging enables us to gain insight on the light transport mechanisms in the random material, to visualize its weak localization length and to demonstrate out-of-plane beaming of the scattered coherent Raman light. The direct visualization of coherent light beaming in such random networks of silicon nanowires offers novel opportunities for fundamental studies of light propagation in disordered media. It also opens venues for the development of next generation optical devices based on disordered structures, such as sensors, light sources, and optical switches.
中文翻译：
来自硅纳米线随机网络的弱局域拉曼定向光束的可视化
无序光学介质是一类能够强烈散射光的新兴材料。这些材料可用于研究光传输现象以及在成像、传感和能量存储方面的应用。虽然使用此类材料可以产生相干光，但其定向发射通常因其强散射特性而受到阻碍。在这里，作者通过实空间显微镜和傅立叶成像直接对来自硅纳米线随机网络的瑞利散射、光致发光和弱局域拉曼光进行成像。直接成像使我们能够深入了解随机材料中的光传输机制，可视化其弱定位长度并演示散射相干拉曼光的面外光束。在硅纳米线的随机网络中直接可视化相干光束为无序介质中光传播的基础研究提供了新的机会。它还为开发基于无序结构的下一代光学器件（例如传感器、光源和光开关）开辟了场所。
更新日期：2021-05-09
中文翻译：
来自硅纳米线随机网络的弱局域拉曼定向光束的可视化
无序光学介质是一类能够强烈散射光的新兴材料。这些材料可用于研究光传输现象以及在成像、传感和能量存储方面的应用。虽然使用此类材料可以产生相干光，但其定向发射通常因其强散射特性而受到阻碍。在这里，作者通过实空间显微镜和傅立叶成像直接对来自硅纳米线随机网络的瑞利散射、光致发光和弱局域拉曼光进行成像。直接成像使我们能够深入了解随机材料中的光传输机制，可视化其弱定位长度并演示散射相干拉曼光的面外光束。在硅纳米线的随机网络中直接可视化相干光束为无序介质中光传播的基础研究提供了新的机会。它还为开发基于无序结构的下一代光学器件（例如传感器、光源和光开关）开辟了场所。
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