Dual Band Computational Infrared Spectroscopy via Large Aperture Meta-Optics
Dual Band Computational Infrared Spectroscopy via Large Aperture Meta-Optics
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DOI：
10.1021/acsphotonics.2c01017
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发表时间：
2022-09-19
期刊：
影响因子：
7
通讯作者：
Majumdar, Arka
中科院分区：
文献类型：
--
作者：
Froch, Johannes E.;Colburn, Shane;Majumdar, Arka
当代光子学研究的一个重要挑战是光学元件和设备的小型化，以促进它们在更紧凑且节能的移动的平台中的部署。由于光谱仪是用于光学测量的最基本的工具之一，因此存在特别强烈的需求来寻找新的概念来替代通常使用的光谱仪，通常使用的光谱仪体积大，因此对于移动的应用来说通常是不切实际的。亚波长散射体的阵列，也称为元光学器件，被设计成成形和操纵透射的光波前，为这个问题提供了特别有吸引力的解决方案。本文中，提出了计算光谱仪的概念，其中高效双螺旋元光学器件的强色点扩散函数与计算后端结合使用以精确地重建光谱。这在两个不同的红外波长范围（1260-1360 nm和1480-1640 nm）中得到了证明，同时实现了3.5 nm的光谱分辨率，强调了小型元光学光谱仪的潜力。
An important challenge in contemporary photonics research is the miniaturization of optical components and devices to facilitate their deployment in more compact and energy-efficient mobile platforms. As spectrometers are one of the most essential tools for optical measurements, a particularly strong demand exists to find new concepts to replace commonly used spectrometers, which are typically bulky and therefore often impractical for mobile applications. Arrays of subwavelength scatterers, also known as meta-optics, engineered to shape and manipulate transmitted optical wavefronts provide a particularly appealing solution for this problem. Herein, the concept of a computational spectrometer is presented where strongly chromatic point spread functions of a high-efficiency double helix meta-optic are utilized in combination with a computational back end to accurately reconstruct optical spectra. This is demonstrated in two different infrared wavelength ranges (1260-1360 nm and 1480-1640 nm), while achieving a spectral resolution of & SIM;3.5 nm, underlining the potential of a small footprint meta-optical spectrometer.