Two-photon fluorescence diagnostics of femtosecond laser tweezers

Kumar De, A.; Roy, D.; Goswami, D.

Current Science 101(7): 935-945

2011


ISSN/ISBN: 0011-3891
PMID: 23814313
Document Number: 654844
We show how two-photon fluorescence signal can be used as an effective detection scheme for trapping particles of any size in comparison to methods using back-scattered light. Development of such a diagnostic scheme allows us a direct observation of trapping a single nanoparticle, which shows new directions to spectroscopy at the single-molecule level in solution.

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