SIMULTANEOUS SCANNING TUNNELING AND OPTICAL NEAR-FIELD IMAGING WITH A MICROPIPETTE

Cross correlated near-field scanning optical microscopy and tunneling images are presented. These images were obtained simultaneously using a metal coated micropipette as both a tunneling and near-field optical probe. The optical and tunneling images exhibit a strong correlation but also contain differences representing real surface features which either technique alone would not indicate. The effect of crosstalk between the tunneling and optical images and possible artifacts introduced to the optical image by the feedback are discussed.