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 language | English |
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Pages (from-to) | 2089-2091 |
Number of pages | 3 |
Journal | Optics Letters |
Volume | 33 |
Issue number | 18 |
DOIs | |
Publication status | Published - Sep 15 2008 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics