PHOTON SCANNING TUNNELING MICROSCOPE USING INCOHERENT POLYCHROMATIC-LIGHT

A photon scanning tunneling microscope (PSTM) using an incoherent poly chromatic light source has been constructed and used to image submicro nic structures in a constant intensity mode. The experimental values o f the penetration depth of the incident electromagnetic field of the s ystem are in good agreement with the theoretical values obtained with a three-media model. This new method for operating a PSTM offers a wid e range of applications: determination of local indexes of refraction or local spectroscopies.