Nanoscale fluorescence imaging with quantum dot near-field electroluminescence

  title={Nanoscale fluorescence imaging with quantum dot near-field electroluminescence},
  author={Kazunori Hoshino and Ashwini Gopal and Micah S. Glaz and David Anton Vanden Bout and Xiaojing J Zhang},
  journal={Applied Physics Letters},
We demonstrate near-field fluorescence excitation and imaging with a quantum dot (QD) light emitting diode (QDLED) integrated at the tip of a scanning probe. The tip-embedded QDLED is employed in a near-field scanning optical microscopy setup to directly excite a secondary colloidal QD sample. Electrically pumped QDs enable multi-color, self-illuminating probes with no conventional optics needed for light coupling. Monolayer QDs stamped at the very tip of a micromachined silicon probe… 

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