Journal of Nanomedicine & Nanotechnology

A home built low temperature laser scanning tunneling microscope for nanoscale optical experiments

Nanotechnology Congress & Expo

August 11-13, 2015 Frankfurt, Germany

Haigang Zhang1, Joseph A Smerdon2, Ozgun Suzer3 and Jeffrey R Guest1

Poster-Accepted Abstracts: J Nanomed Nanotechnol

Abstract:

To better understand the optical and photo-physical properties of single molecules/atoms at nanoscale, which is critically important for the development of molecular electronics and organic photovoltaic devices, we are developing a low temperature Laser Scanning Tunneling Microscope (LT Laser STM) with integrated high-numerical-aperture (NA) optics based on the Pan-style STM scanner. Using slip-stick inertial piezo steppers, the sample stage can be coarsely translated in X and Y directions. For optical experiments, three-axis inertial lens stages behind and above the sample can align the high-NA optics to focus laser excitation to and from photon collection at the tip-sample junction. The STM is cooled by a liquid helium bath surrounded by a liquid nitrogen jacket for operation near 5 K. Two separate ultrahigh vacuum chambers are used for sample preparation and STM measurements. The STM have been finished and the Laser section will be incorporated soon.