Lapshin, D. A.Letokhov, V. S.Shubeita, G. T.Sekatskii, S. K.Dietler, G.2007-06-202007-06-202007-06-20200210.1063/1.1499736https://infoscience.epfl.ch/handle/20.500.14299/9078Direct measurement of the absolute value of the interaction force between the fiber probe and the sample in a scanning near-field optical microscopetext::journal::journal article::research article