Super-resolution in label-free photomodulated reflectivity

Omer Tzang, Alexander Pevzner, Robert E. Marvel, Richard F. Haglund, Ori Cheshnovsky

Research output: Contribution to journalArticlepeer-review


We demonstrate a new, label-free, far-field super-resolution method based on an ultrafast pump-probe scheme oriented toward nanomaterial imaging. A focused pump laser excites a diffraction-limited spatial temperature profile, and the nonlinear changes in reflectance are probed. Enhanced spatial resolution is demonstrated with nanofabricated silicon and vanadium dioxide nanostructures. Using an air objective, resolution of 105 nm was achieved, well beyond the diffraction limit for the pump and probe beams and offering a novel kind of dedicated nanoscopy for materials.

Original languageEnglish
Pages (from-to)1362-1367
Number of pages6
JournalNano Letters
Issue number2
StatePublished - 11 Feb 2015


  • Super resolution
  • label-free
  • microscopy
  • semiconductors
  • ultrafast optics


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