2011年2月11日
Application of a modulating technique to detect near-field signals using a conventional IR spectrometer with a ceramic light source
e-Journal of Surface Science and Nanotechnology
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- 巻
- 9
- 号
- 開始ページ
- 40
- 終了ページ
- 45
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1380/ejssnt.2011.40
The goal of the present study is to obtain broadband near-field infrared (IR) spectra by combining Fouriertransform infrared spectroscopy (FTIR) with scattering near-field optical microscopy (s-SNOM). A stage was added to the IR spectrometer with a ceramic light source in order to modulate the probe-sample distance, and the second harmonic component was extracted by a lock-in amplifier. The detected IR signal intensity decreased exponentially with the distance between the probe tip and an Au mirror, with a localization scale of approximately 100 nm. An area with Au islands formed by electron beam lithography was scanned with the modulation system with mapping steps of X = 80 nm and Y = 133 nm. The obtained IR intensity image matches the topographic image, indicating sub-micron spatial resolution. These results indicate that the addition of the modulation system to the broadband near-field IR spectrometer was successful in obtaining localized near-field signals and sub-micron spatial resolution, even using a ceramic IR light source. © 2011 The Surface Science Society of Japan.
- リンク情報
- ID情報
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- DOI : 10.1380/ejssnt.2011.40
- eISSN : 1348-0391
- SCOPUS ID : 79952404682