Dual Raman-Brillouin Microscope for Chemical and Mechanical Characterization and Imaging

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• 作者：Andrew J. Traverso ; Jonathan V. Thompson ; Zachary A. Steelman ; Zhaokai Meng ; Marlan O. Scully ; Vladislav V. Yakovlev
• 刊名：Analytical Chemistry
• 出版年：2015
• 出版时间：August 4, 2015
• 年：2015
• 卷：87
• 期：15
• 页码：7519-7523
• 全文大小：289K
• ISSN：1520-6882

文摘

We present a unique confocal microscope capable of measuring the Raman and Brillouin spectra simultaneously from a single spatial location. Raman and Brillouin scattering offer complementary information about a material鈥檚 chemical and mechanical structure, respectively, and concurrent monitoring of both of these spectra would set a new standard for material characterization. We achieve this by applying recent innovations in Brillouin spectroscopy that reduce the necessary acquisition times to durations comparable to conventional Raman spectroscopy while attaining a high level of spectral accuracy. To demonstrate the potential of the system, we map the Raman and Brillouin spectra of a molded poly(ethylene glycol) diacrylate (PEGDA) hydrogel sample in cyclohexane to create two-dimensional images with high contrast at microscale resolutions. This powerful tool has the potential for very diverse analytical applications in basic science, industry, and medicine.