Two-photon quantum dot excitation during optical trapping.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 20402477.
- Also identified by DOI 10.1021/nl100924z.
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Abstract
A single CW infrared laser beam can simultaneously trap and excite an individual colloidal quantum dot. Though the laser light is relatively weak, the excitation occurs through two-photon absorption. This finding eliminates the demand for an excitation light source in addition to a trapping laser in nanoscale experiments with simultaneous force-manipulation and quantum dot visualization. Also, we demonstrate that optical trapping efficiencies of individual quantum dots do not correlate with their emission wavelength or physical size.
Medical subject headings
- Optical Tweezers
- Quantum Dots