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arXiv 2209.06372physics.opticsphysics.app-ph
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高速无扫描全带宽中红外化学成像

High-speed scanless entire bandwidth mid-infrared chemical imaging

Yue Zhao, Shota Kusama, Yuji Furutani, Wei-Hong Huang, Chih-Wei Luo, Takao Fuji

AI总结:

本文提出基于啁啾脉冲上转换的高速无扫描中红外高光谱化学成像技术,实现全带宽、高分辨率成像,并成功用于微流控器件、植物细胞和小鼠胚胎切片的多组分识别与成像。

摘要:

中红外光谱通过探测分子振动来识别化学物种和官能团。因此,中红外高光谱成像是利用光学方法进行化学成像的最强大和最有前景的候选技术之一。然而,高速且覆盖全带宽的中红外高光谱成像尚未实现。本文报道了一种中红外高光谱化学成像技术,该技术在像平面上利用亚周期脉冲的啁啾脉冲上转换。该技术提供15 μm的横向分辨率,视场可在800 μm × 600 μm至12 mm × 9 mm之间调节。高光谱成像在8 s内生成640 × 480像素的图像,覆盖640–3015 cm⁻¹的光谱范围,包含1069个波长点,波数分辨率为2.6–3.7 cm⁻¹。对于离散频率中红外成像,测量速度达到5 kHz的帧率,即激光的重复频率。作为演示,我们有效识别并绘制了微流控器件、植物细胞和小鼠胚胎切片中的不同组分。该技术在化学成像中的巨大能力和潜在力量有望应用于化学分析、生物学和医学等多个领域。

英文摘要:

Mid-infrared spectroscopy probes molecular vibrations to identify chemical species and functional groups. Therefore, mid-infrared hyperspectral imaging is one of the most powerful and promising candidates for chemical imaging using optical methods. Yet high-speed and entire bandwidth mid-infrared hyperspectral imaging has not been realized. Here we report a mid-infrared hyperspectral chemical imaging technique that uses chirped pulse upconversion of sub-cycle pulses at the image plane. This technique offers a lateral resolution of 15 $μ$m, and the field of view is adjustable between 800 $μ$m $\times$ 600 $μ$m to 12 mm $\times$ 9 mm. The hyperspectral imaging produces a 640 $\times$ 480 pixel image in 8 s, which covers a spectral range of 640-3015 cm$^{-1}$, comprising 1069 wavelength points and offering a wavenumber resolution of 2.6-3.7 cm$^{-1}$. For discrete frequency mid-infrared imaging, the measurement speed reaches a frame rate of 5 kHz, the repetition rate of the laser. As a demonstration, we effectively identified and mapped different components in a microfluidic device, plant cell, and mouse embryo section. The great capacity and latent force of this technique in chemical imaging promise to be applied to many fields such as chemical analysis, biology, and medicine.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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