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  • Title: Broadband near-field mid-infrared spectroscopy and application to phonon resonances in quartz.
    Author: Ishikawa M, Katsura M, Nakashima S, Ikemoto Y, Okamura H.
    Journal: Opt Express; 2012 May 07; 20(10):11064-72. PubMed ID: 22565729.
    Abstract:
    Infrared (IR) spectroscopy is a versatile analytical method and nano-scale spatial resolution could be achieved by scattering type near-field optical microscopy (s-SNOM). The spectral bandwidth was, however, limited to approximately 300 cm(-1) with a laser light source. In the present study, the development of a broadband mid-IR near-field spectroscopy with a ceramic light source is demonstrated. A much wider bandwidth (at least 3000 to 1000 cm(-1)) is achieved with a ceramic light source. The experimental data on quartz Si-O phonon resonance bands are well reproduced by theoretical simulations indicating the validity of the present broadband near-field IR spectroscopy.
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