Ishikawa Michio, Katsura Makoto, Nakashima Satoru, Ikemoto Yuka, Okamura Hidekazu
Department of Earth and Space Science, Graduate School of Science, Osaka University, Toyonaka, Osaka, Japan.
Opt Express. 2012 May 7;20(10):11064-72. doi: 10.1364/OE.20.011064.
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.
红外（IR）光谱是一种通用的分析方法，通过散射型近场光学显微镜（s-SNOM）可以实现纳米级空间分辨率。然而，使用激光光源时，光谱带宽限制在约300 cm⁻¹。在本研究中，展示了一种采用陶瓷光源的宽带中红外近场光谱技术的发展。使用陶瓷光源可实现更宽的带宽（至少3000至1000 cm⁻¹）。石英Si-O声子共振带的实验数据通过理论模拟得到了很好的再现，表明了本宽带近场红外光谱的有效性。
