Giant and broad-band absorption enhancement in colloidal quantum dot monolayers through dipolar coupling.
basic_science · Level V
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- Record sourced from PubMed, PMID 23297750.
- Also identified by DOI 10.1021/nn305524a.
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Abstract
The absorption cross section of colloidal quantum dots in close-packed monolayers shows a 4 (CdSe) to 5-fold (PbS) enhancement compared to quantum dots in a dilute dispersion. Quantitative agreement is demonstrated between the value and the size dependence of the enhancement and theoretical model predictions based on dipolar coupling between neighboring quantum dots. This collective optical behavior offers a new degree of freedom in the custom design of optical properties for electro-optical devices.
Medical subject headings
- Cadmium Compounds
- Lead
- Quantum Dots
- Selenium Compounds
- Sulfides