Three-dimensional mapping of near-field interactions via single-photon tomography.
We demonstrate a near-field tomography method for investigating the coupling between a nanoscopic probe and a fluorescent sample. By correlating the arrival of single fluorescence photons with the lateral and vertical position of an oscillating tip, a complete three-dimensional analysis of the near-field coupling is achieved. The technique is used to reveal a number of interesting three-dimensional near-field features and to improve image contrast in tip-enhanced fluorescence microscopy.
Mangum
Benjamin D
BD
Department of Physics and Astronomy, University of Utah, Salt Lake City, Utah 84112, USA.
Shafran
Eyal
E
Mu
Chun
C
Gerton
Jordan M
JM