title: Shear Brillouin light scattering microscope.
abstract: Brillouin spectroscopy has been used to characterize shear acoustic phonons in materials. However, conventional instruments had slow acquisition times over 10 min per 1 mW of input optical power, and they required two objective lenses to form a 90° scattering geometry necessary for polarization coupling by shear phonons. Here, we demonstrate a confocal Brillouin microscope capable of detecting both shear and longitudinal phonons with improved speeds and with a single objective lens. Brillouin scattering spectra were measured from polycarbonate, fused quartz, and borosilicate in 1-10 s at an optical power level of 10 mW. The elastic constants, phonon mean free path and the ratio of the Pockels coefficients were determined at microscopic resolution.
authors.forename: Moonseok
authors.initials: M
authors.lastname: Kim
authors.forename: Sebastien
authors.initials: S
authors.lastname: Besner
authors.forename: Antoine
authors.initials: A
authors.lastname: Ramier
authors.forename: Sheldon J J
authors.initials: SJ
authors.lastname: Kwok
authors.forename: Jeesoo
authors.initials: J
authors.lastname: An
authors.forename: Giuliano
authors.initials: G
authors.lastname: Scarcelli
authors.forename: Seok Hyun
authors.initials: SH
authors.lastname: Yun
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D007089:Image Enhancement / Q000295:instrumentation*; D007909:Lenses; D008029:Lighting / Q000295:instrumentation*; D018613:Microscopy, Confocal / Q000295:instrumentation*; D012031:Refractometry / Q000295:instrumentation*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
references.citation: Nat Photonics. 2007 Dec 9;2:39-43
references.pmid: 19812712
references.citation: Opt Lett. 2008 Dec 15;33(24):2979-81
references.pmid: 19079512
references.citation: Nature. 1980 Apr 3;284(5755):489-91
references.pmid: 7360286
references.citation: Nano Lett. 2008 Oct;8(10):3194-9
references.pmid: 18767884
references.citation: Nat Mater. 2013 Mar;12(3):262-7
references.pmid: 23353627
references.citation: Science. 1992 Jul 3;257(5066):66-8
references.pmid: 17800712
references.citation: Biophys J. 2011 Sep 21;101(6):1539-45
references.pmid: 21943436
references.citation: Rev Sci Instrum. 2007 Jul;78(7):076104
references.pmid: 17672803
references.citation: Opt Express. 2011 May 23;19(11):10913-22
references.pmid: 21643351
references.citation: Invest Ophthalmol Vis Sci. 2012 Jan;53(1):185-90
references.pmid: 22159012
references.citation: JAMA Ophthalmol. 2015 Apr;133(4):480-2
references.pmid: 25611213