Optical sectioning by multiexcitonic ladder climbing in colloidal quantum dots

Nir R. Ben-Haim, Dan Oron

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8 Citations (Scopus)

Abstract

Optical sectioning is performed by collecting the fluorescent emission of two-exciton states in colloidal quantum dots. The two-exciton state is created by two consecutive resonant absorption events, thus requiring unprecedented low excitation energy and peak powers as low as 106 W/cm2. The depth resolution is shown to be equivalent to that of standard multiphoton microscopy, and it was found to deteriorate only slowly as saturation of the two-exciton state is approached, owing to signal contribution from higher excitonic states.

Original languageEnglish
Pages (from-to)2089-2091
Number of pages3
JournalOptics Letters
Volume33
Issue number18
DOIs
Publication statusPublished - Sep 15 2008

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ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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