Laboratoire de Nanotechnologie et d’instrumentation optique, Institut Charles Delaunay, Université de Technologie de Troyes, BP2060, Troyes, 10010, France.
Opt Lett. 2010 Oct 1;35(19):3303-5. doi: 10.1364/OL.35.003303.
We report on a concept of compact optical Fourier-transform spectrometer based on bidimensional (2D) spatial sampling of a confined interferogram. The spectrometer consists of a nanostructured glass surface on which two light beams interfere in total internal reflection. Subwavelength spatial sampling of the interferogram near field is achieved by introducing a tilt angle between a 2D array of optical nanoantennas and the interferogram pattern. The intensity distribution of the scattered light is recorded on a 2D CCD camera, and a one-dimensional Fourier transform of the interferogram is used to recover the input light spectrum. Experimental results show a wide spectral bandwidth in the visible range, down to 380 nm, with spectral resolution of 1.6 nm around 780 nm.
我们报告了一种基于受限干涉图二维（2D）空间采样的紧凑型光学傅里叶变换光谱仪的概念。该光谱仪由纳米结构玻璃表面组成，其中两束光在全内反射中发生干涉。通过在二维光学纳米天线阵列和干涉图案之间引入一个倾斜角，实现了近场干涉图的亚波长空间采样。散射光的强度分布记录在二维 CCD 相机上，通过对干涉图进行一维傅里叶变换来恢复输入光的光谱。实验结果表明，在可见光谱范围内，光谱带宽很宽，低至 380nm，在 780nm 左右的光谱分辨率为 1.6nm。
