Broadband near-field mid-infrared spectroscopy and application to phonon resonances in quartz

Optics Express
Michio IshikawaHidekazu Okamura

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.

References

Mar 7, 2009·Nature Nanotechnology·A J HuberR Hillenbrand
Apr 19, 2011·Nature Materials·F HuthR Hillenbrand

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