Simple and efficient scanning tunneling luminescence detection at low-temperature

Keizer, J. G.; Garleff, J. K.; Koenraad, P. M.
December 2009
Review of Scientific Instruments;Dec2009, Vol. 80 Issue 12, p123704
Academic Journal
We have designed and built an optical system to collect light that is generated in the tunneling region of a low-temperature scanning tunneling microscope. The optical system consists of an in situ lens placed approximately 1.5 cm from the tunneling region and an ex situ optical lens system to analyze the emitted light, for instance, by directing the light into a spectrometer. As a demonstration, we measured tip induced photoluminescence spectra of a gold surface. Furthermore, we demonstrate that we can simultaneously record scanning tunneling microscope induced luminescence and topography of the surface both with atomic resolution.


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