Electroluminescence hyperspectral imaging of light-emitting diodes using a liquid crystal tunable filter
Electroluminescence hyperspectral imaging of light-emitting diodes using a liquid crystal tunable filter
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DOI：
10.1063/5.0165060
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发表时间：
2023-09
影响因子：
4
通讯作者：
P. Edwards;J. Bruckbauer;D. Cameron;Robert W. Martin
中科院分区：
文献类型：
--
作者：
P. Edwards;J. Bruckbauer;D. Cameron;Robert W. Martin
我们演示了如何使用低成本的基于液晶的波长可调滤光片和cmos摄像机来为配备了简单光学显微镜的探测站增加高光谱成像能力。所得到的设置用于快速解决InxGa1−xN/GaN发光二极管中通常观察到的光谱和空间变化。应用多变量数据集内的标准统计分析，例如矩和主成分，我们观察到频谱尺度上的不均匀性明显小于可调谐滤波器的带宽。合成的工具为光电子器件的高通量高光谱分析提供了扫描束发光技术的替代方案。
We demonstrate the use of a low-cost liquid-crystal-based wavelength-tunable filter and CMOS video camera to add hyperspectral imaging capabilities to a probe station equipped with a simple optical microscope. The resultant setup is used to rapidly resolve the spectral and spatial variations in electroluminescence typically observed for InxGa1−xN/GaN light-emitting diodes. Applying standard statistical analyses of variation within the multivariate datasets, such as moments and principal components, we observe inhomogeneities on a spectral scale significantly smaller than the bandwidth of the tunable filter. The resultant tool offers an alternative to scanning beam luminescence techniques for high-throughput hyperspectral analysis of optoelectronic devices.