Ultra-long-working-distance spectroscopy of single nanostructures with aspherical solid immersion microlenses
Ultra-long-working-distance spectroscopy of single nanostructures with aspherical solid immersion microlenses
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DOI：
10.1038/s41377-020-0284-1
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发表时间：
2020-03-27
影响因子：
19.4
通讯作者：
Kossacki, Piotr
中科院分区：
文献类型：
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作者：
Bogucki, Aleksander;Zinkiewicz, Lukasz;Kossacki, Piotr
微小的椭圆微透镜有效地将光聚焦并从纳米级光源中提取，实现了超长工作距离的测量。华沙大学物理系的Aleksander Bogucki和他的同事们通过在发光量子点和一种由新型2D材料制成的更脆弱的层状结构上进行3D打印来测试他们的微透镜。他们演示了微透镜可以确定地放置在样品的特定部分，或者可以在包含大量光源的样品上打印成数百个透镜的大规模阵列。它也可以印在易碎材料上而不影响其性能。这一发现将为其广泛应用铺平道路，包括单纳米线激光器、光导天线、高磁场中的光学装置和集成光子电路。在光科学和应用中，高效的光发射器/探测器和负责光提取和传输的光学元件发挥着同样重要的作用。后者应该是简单的、成本效益高的、宽频的、多功能的，并且与广泛需要的微光学系统的其他组件兼容。理想情况下，它们也应该在没有高数值孔径光学器件的情况下工作。在这里，我们证明了所有这些要求都可以通过在光源顶部3D打印的椭圆微透镜来满足。重要的是，我们提出的微透镜很容易将收集的光形成超低散度光束（半角散度低于1度），非常适合超长工作距离光学测量（1英寸收集透镜600毫米），这是迄今为止其他光谱技术无法实现的。我们的微透镜可以在各种各样的样品上制造，包括半导体量子点和由新型二维材料制成的脆弱的范德华异质结构，如单层和几层过渡金属二硫化物。
Ultra-long-working-distance spectroscopy of nanostructures with elliptical 3D-printed microlenses Tiny elliptical microlenses efficiently focus light onto and extract it from nano-sized light emitters, enabling an ultra-long-working-distance measurements. Aleksander Bogucki from the Faculty of Physics, University of Warsaw and colleagues tested their microlenses by 3D printing them on top of light-emitting quantum dots and a more fragile layered structure made of novel 2D materials. They demonstrated the microlenses can be deterministically placed onto specific parts of a sample, or can be printed as a large-scale array of hundreds of lenses on samples containing a large number of light emitters. It can also be printed onto fragile materials without affecting their properties. The findings could pave the way for their use in a wide range of applications, including single-nanowire lasers, photoconductive antennas, optical setups in high magnetic fields, and in integrated photonic circuits.In light science and applications, equally important roles are played by efficient light emitters/detectors and by the optical elements responsible for light extraction and delivery. The latter should be simple, cost effective, broadband, versatile and compatible with other components of widely desired micro-optical systems. Ideally, they should also operate without high-numerical-aperture optics. Here, we demonstrate that all these requirements can be met with elliptical microlenses 3D printed on top of light emitters. Importantly, the microlenses we propose readily form the collected light into an ultra-low divergence beam (half-angle divergence below 1 degrees) perfectly suited for ultra-long-working-distance optical measurements (600 mm with a 1-inch collection lens), which are not accessible to date with other spectroscopic techniques. Our microlenses can be fabricated on a wide variety of samples, including semiconductor quantum dots and fragile van der Waals heterostructures made of novel two-dimensional materials, such as monolayer and few-layer transition metal dichalcogenides.