Computational spectropolarimetry with a tunable liquid crystal metasurface
Computational spectropolarimetry with a tunable liquid crystal metasurface
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DOI：
10.1186/s43593-022-00032-0
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发表时间：
2022-11-04
期刊：
影响因子：
--
通讯作者：
Yang, Yuanmu
中科院分区：
文献类型：
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作者：
Ni, Yibo;Chen, Chen;Yang, Yuanmu
虽然传统的光电探测器只能测量光强度，但矢量光场包含更丰富的信息，包括偏振和光谱，这对于从成像到电信的许多应用都是必不可少的。然而，多维光场信息的同时测量通常需要色散或偏振选择元件的复用，导致过度的系统复杂性。在这里，我们展示了一个近红外光谱偏振仪的基础上电可调液晶超颖表面。作为矢量光场的编码器的可调谐超表面被定制为支持具有多样和各向异性光谱特征的高品质因数导模谐振，从而允许以高保真度计算重建入射光的全斯托克斯参数和光谱。使用可调谐超表面进行多维光场编码的概念可以为开发具有最小化的尺寸、重量、成本和复杂性的矢量光场传感器开辟新的视野。
While conventional photodetectors can only measure light intensity, the vectorial light field contains much richer information, including polarization and spectrum, that are essential for numerous applications ranging from imaging to telecommunication. However, the simultaneous measurement of multi-dimensional light field information typically requires the multiplexing of dispersive or polarization-selective elements, leading to excessive system complexity. Here, we demonstrate a near-infrared spectropolarimeter based on an electrically-tunable liquid crystal metasurface. The tunable metasurface, which acts as an encoder of the vectorial light field, is tailored to support high-quality-factor guided-mode resonances with diverse and anisotropic spectral features, thus allowing the full Stokes parameters and the spectrum of the incident light to be computationally reconstructed with high fidelity. The concept of using a tunable metasurface for multi-dimensional light field encoding may open up new horizons for developing vectorial light field sensors with minimized size, weight, cost, and complexity.