聚合物薄膜中拉曼成像检测方案

Raman Imaging of Holographic GratingsInscribed on Polymer Thin Films. F.Lagugne-Labarthet and David Talaga LPCM， UMR 5803 CNRS， Universite Bordeaux 1， 351， Cours de la Liberation， 33405 Talence cedex， France Raman image (Figure 1) from a thin film ofazobenzene-containing polymer thin film (300nm) that is periodically structured (periodicity of~1 um). Raman measurements were recordedwith a Labram HR 800 (HORIBA JobinYvon)spectrometer combinedwith2aninvertedmicroscope (Olympus Ix71) eand|a X，YPiezoelectric stage to position the sample withthe best accuracy and repeatability. A 100X，0.9 NA microscope objective was used. ARaman spectrum (Fig. 2) was recorded every100 nm along the X and Y directions with anintegration time of 5 seconds per spectrum (aexcitation=752.44 nm). The variation of theRaman signal was integrated over the [1060-1180]cm spectral domain (Figure 3). It mustpointed out that details on the Raman profileare obtained with a spatial resolution betterthan A/2 (at the diffraction limit). Figure 2： Raman Spectra of azobenzenepolymer. Acquisition time 5 sec. Raman profile cE Figure 3： Variation of the Raman intensityoverthe Xand Y directions. About the inscription of the two-dimensional grating... Using holographic techniqueswehavestructured the surface in a one step procedure(no wet nor photocuring processing) along theX and Y directions. A grating is first inscribedwith grooves along the X direction， the sampleis rotated by 90° and a second grating isinscribed with grooves along the Y direction.The intensity of the 1st diffracted orders ismonitored to have equal intensities in both Xand Y directions. The atomic force microscopy(AFM) images shown in Fig.3 exhibit a periodicstructure on large surfaces with a heightamplitude varying from 50 to 110 nm. nm/div 7e+002_ Figuree33：： AFMimagesinn 3D) and2Drepresentationsanddp )file ofthe 1heightvariations. ：References "Chromophore Orientations upon irradiation ingratings inscribed on azo dye polymer films： acombined AFMand confocal Ramanmicroscopic study"， F.Lagugne-Labarthet， J.L.Bruneel， T.Buffeteau， C.Sourisseau， J. Phys.Chem. B.， 2004，108， 6949. "Molecular orientations in a nonlinear opticalazopolymer diffraction grating： odd and evenorder parametersffrommnear-fieldsecondharmonic generationandfar-field Ramanmicroscopies"， F.Lagugne-Labarthet，C. Sourisseau， R.D. Schaller. R.Saykally，P.Rochon， J.. lPhys.. CChem B，2004，，108.17059. France： HORIBA Jobin Yvon S.A.S.， 231 rue de Lille， 59650 Villeneuve d'Ascq. Tel：+33 (0)3 20 59 18 00， ( Fax： + 33 (0)3 20 5918 08. Email ：raman@jobinyvon.fr w w w.jobinyvon.fr ) ( UsA： HORIBA Jobin Yvon I n c.， 3880 Park Avenue， Edison，NJ 08820-3012. Tel：+1-732-494-8660，Fax：+1-732-549-2571. Email ： raman@jobinyvon.com w w w.jobinyvon.com Japan ： HORIBA Ltd.， JY Optical Sales D e pt.， 1-7-8 Higashi-kanda， Chiyoda-ku， T o kyo 101-0031. T el： + 81 (0)3 3861 8231， Fax： +81 (0)3 3861 8259. Email： raman@horiba.com ) ( Germany： +49 (0)6251 84 75-0 I taly： +39 02 57603050 0 U K： +44 (0)20 8204 8142 2/2 ) ORIBAExplore the future China： +All HORIBA Jobin Yvon companies were formerly known as Jobin Yvon)HORIBAExplore the future