caa a22 4500 463211596 CHVBK 20180405153142.0 cr unu---uuuuu 170326e20070901xx s 000 0 eng 10.1007/s00339-007-4089-3 doi (NATIONALLICENCE)springer-10.1007/s00339-007-4089-3 Phase transformation at the surface of TiO2 single crystal irradiated by femtosecond laser pulse [Elektronische Daten] [J.Y. Yang, H.L. Ma, G.H. Ma, B. Lu, H. Ma] Phase transformation of a titanium oxide crystal irradiated by a femtosecond laser from rutile to anatase was studied by Raman spectroscopy. In the case of the high temperature phase of TiO2 single crystal rutile, irradiated by the 120fs, 800nm, 250kHz femtosecond laser with an average power of 300mW for a short time, the intensity of Raman active mode Eg (446cm-1) of TiO2 would decrease, while that of A1g (611cm-1) increased, which indicated the color-center-defect-cluster was formed. After the longer irradiation time (less than 600s), four new Raman active modes would occur, so a part of rutile in the irradiated region was transformed into anatase phase. As the irradiation time increased, the component of anatase increased to a constant, while that of rutile decreased. By this means, we can selectively induce anatase on the rutile surface through controlling the femtosecond laser exposure region. We suggest that this technique can be applied to fabricate micro patterns of anatase. Springer-Verlag, 2007 Yang J.Y. Department of Physics, Shanghai University, 200444, Shanghai, P.R. China aut Ma H.L. Department of Physics, Shanghai University, 200444, Shanghai, P.R. China aut Ma G.H. Department of Physics, Shanghai University, 200444, Shanghai, P.R. China aut Lu B. Instrumental Analysis and Research Center, Shanghai University, 200444, Shanghai, P.R. China aut Ma H. Department of Physics, Shanghai University, 200444, Shanghai, P.R. China aut Applied Physics A Springer-Verlag 88/4(2007-09-01), 801-804 0947-8396 88:4<801 2007 88 339 https://doi.org/10.1007/s00339-007-4089-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00339-007-4089-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yang J.Y. Department of Physics, Shanghai University, 200444, Shanghai, P.R. China aut NATIONALLICENCE 700 1- Ma H.L. Department of Physics, Shanghai University, 200444, Shanghai, P.R. China aut NATIONALLICENCE 700 1- Ma G.H. Department of Physics, Shanghai University, 200444, Shanghai, P.R. China aut NATIONALLICENCE 700 1- Lu B. Instrumental Analysis and Research Center, Shanghai University, 200444, Shanghai, P.R. China aut NATIONALLICENCE 700 1- Ma H. Department of Physics, Shanghai University, 200444, Shanghai, P.R. China aut NATIONALLICENCE 773 0- Applied Physics A Springer-Verlag 88/4(2007-09-01), 801-804 0947-8396 88:4<801 2007 88 339 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer