Ho, F. H.F. H.HoTsai, D. P.D. P.TsaiYang, C. W.C. W.Yang2009-03-172018-06-282009-03-172018-06-281999http://ntur.lib.ntu.edu.tw//handle/246246/144982en-USImaging the near-field intensity gradients with a tapping-mode near-field scanning optical microscopeconference paper