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A method for obtaining absorption spectra from near-field infrared light scattering using homodyne detection.
A method for obtaining absorption spectra from near-field infrared light scattering using homodyne detection.
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机译:一种使用零差检测从近场红外光散射获得吸收光谱的方法。
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摘要
The present disclosure provides a procedure and an apparatus to obtain the absorption profiles of molecular resonance with ANSOM. The method includes setting a reference field phase to φ=0.5π relative to the near-field field, and reference amplitude A≧5|αeff|. The requirement on phase precision is found to be 0.3π. The apparatus includes a phase stabilization mechanism in addition to the ANSOM to maintain high phase precision homodyne phase condition of less than 0.1 rad. This method enables ANSOM performing vibrational spectroscopy at nanoscale spatial resolution.
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