Yang, C. W.C. W.YangTsai, D. P.D. P.TsaiJackson, H. E.H. E.Jackson2011-02-172018-06-282011-02-172018-06-281999-01http://ntur.lib.ntu.edu.tw//handle/246246/231717en-USImaging the evanescent intensity gradient of an optical waveguide using a tapping-mode near-field scanning optical microscope