title: Dual Raman-Brillouin Microscope for Chemical and Mechanical Characterization and Imaging.
abstract: 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's 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.
authors.forename: Andrew J
authors.initials: AJ
authors.lastname: Traverso
authors.forename: Jonathan V
authors.initials: JV
authors.lastname: Thompson
authors.forename: Zachary A
authors.initials: ZA
authors.lastname: Steelman
authors.forename: Zhaokai
authors.initials: Z
authors.lastname: Meng
authors.affiliation: ‡Baylor University, Waco, Texas 76706, United States.|§Princeton University, Princeton, New Jersey 08544, United States.
authors.forename: Marlan O
authors.initials: MO
authors.lastname: Scully
authors.forename: Vladislav V
authors.initials: VV
authors.lastname: Yakovlev
mesh_terms: D002623:Chemistry Techniques, Analytical / Q000379:methods*; D003510:Cyclohexanes / Q000737:chemistry*; D055595:Mechanical Phenomena; D018613:Microscopy, Confocal; D013059:Spectrum Analysis, Raman
chemical_list: D003510:Cyclohexanes; C506365:Cyclohexane