Quantum Fourier-Transform Infrared Spectroscopy for Complex Transmittance Measurements
Quantum Fourier-Transform Infrared Spectroscopy for Complex Transmittance Measurements
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DOI：
10.1103/physrevapplied.15.034019
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发表时间：
2021-03-08
影响因子：
4.6
通讯作者：
Takeuchi, S.
中科院分区：
文献类型：
--
作者：
Mukai, Y.;Arahata, M.;Takeuchi, S.
利用对生成过程的量子干涉，基于具有可见-红外光子对源的非线性干涉仪的红外量子光谱学使得能够通过可见光子检测来提取样品的红外光学性质，而不需要红外光源或检测器。我们开发了一个理论框架的量子傅里叶变换红外光谱（QFTIR）。建议的傅里叶分析方法，充分利用干涉图中的相位信息，使我们能够确定复杂的透射率和光学常数的样品在一个简单的设置，而不使用任何色散光学光谱选择。在实验演示中，带通滤波器的透射光谱和石英玻璃的折射率测量在近红外区域使用QFTIR操作在低增益制度，这些结果与独立测量的光谱，使用传统的光谱仪和从参考文献中估计的值吻合得很好。这些实验证明了QFTIR光谱的有效性和巨大潜力。
Harnessing the quantum interference of the pair generation processes, infrared quantum spectroscopy, based on nonlinear interferometers with visible-infrared photon-pair sources, enables the extraction of the infrared optical properties of a sample through visible photon detection without the need for an infrared optical source or detector. We develop a theoretical framework for quantum Fourier-transform infrared (QFTIR) spectroscopy. The proposed Fourier analysis method, which fully utilizes the phase information in the interferogram, allows us to determine the complex transmittance and optical constants for a sample in a simple setup without the use of any dispersive optics for spectral selection. In the experimental demonstrations, the transmittance spectrum of a bandpass filter and the refractive index of silica glass are measured in the near-infrared region using QFTIR operated in a low gain regime; these results agree well with the independently measured spectrum using a conventional spectrometer and an value estimated from references. These demonstrations prove the validity and great potential of QFTIR spectroscopy.