Nanoprobe Fourier-Transform Photoabsorption Spectroscopy Using a Supercontinuum Light Source
Nanoprobe Fourier-Transform Photoabsorption Spectroscopy Using a Supercontinuum Light Source
复制标题
使用超连续谱光源的纳米探针傅里叶变换光吸收光谱
DOI：
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发表时间：
2012
影响因子：
2.8
通讯作者：
K. Maeda
中科院分区：
文献类型：
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作者：
Kiyoshiro Ishibe;S. Nakada;Y. Mera;K. Maeda
摘要 利用超连续谱光作为傅里叶变换干涉仪的宽带光源进行光谱测量，开发了一种基于扫描隧道显微镜（STM）的光吸收光谱方案。 GaAs 样品的性能得到了验证。概念验证测试表明，使用超连续谱光代替卤素灯可大大提高信噪比，因为从光子晶体光纤的小芯发出的超连续谱光亮度很高，可以将光谱光紧密聚焦到 STM 尖端下方的样品上。
Abstract A scheme of photoabsorption spectroscopy based on scanning tunneling microscopy (STM) has been developed by using a supercontinuum light as the wideband light source of a Fourier transform interferometer for spectroscopic measurements. The performance was demonstrated for a sample of GaAs. The proof-of-concept test showed that the use of the supercontinuum light instead of halogen lamps greatly enhances the signal-to-noise ratio due to the high brilliance of the supercontinuum light emitted from a small core of the photonic crystal fiber that enables tight focusing of the spectroscopy light onto the sample beneath the STM tip.