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Simultaneous scanning tunneling microscope and collection mode scanning near‐field optical microscope using gold coated optical fiber probes

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3 Author(s)
Garcia‐Parajo, M. ; Laboratoire de Microstructures et de Microélectronique, CNRS, BP107, 196 Avenue Henri Ravera, 92225 Bagneaux, France ; Cambril, E. ; Chen, Y.

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Simultaneous scanning tunneling microscope (STM) and collection mode scanning near‐field optical microscope (SNOM) images using tunneling regulation are presented. The images were obtained using a gold coated single optical fiber as both a tunneling and near‐field optical probe. The method counts on the reliable STM distance regulation and the short separation between tip and sample (≪1 nm). Using optimized fiber probes, both STM and SNOM images show good resolution and image contrast. We describe the STM/SNOM system and present the first images obtained in the collection mode with calibration samples of gratings of period down to 200 nm.

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Applied Physics Letters  (Volume:65 ,  Issue: 12 )