title: Giant and broad-band absorption enhancement in colloidal quantum dot monolayers through dipolar coupling.
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.
authors.affiliation: Physics and Chemistry of Nanostructures, Ghent University, B-9000 Ghent, Belgium.
authors.forename: Pieter
authors.initials: P
authors.lastname: Geiregat
authors.forename: Yolanda
authors.initials: Y
authors.lastname: Justo
authors.forename: Sofie
authors.initials: S
authors.lastname: Abe
authors.forename: Stijn
authors.initials: S
authors.lastname: Flamee
authors.forename: Zeger
authors.initials: Z
authors.lastname: Hens
mesh_terms: D000042:Absorption; D019187:Cadmium Compounds / Q000737:chemistry*; D003102:Colloids; D007854:Lead / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry; D010316:Particle Size; D045663:Quantum Dots; D018036:Selenium Compounds / Q000737:chemistry*; D013440:Sulfides / Q000737:chemistry*
chemical_list: D019187:Cadmium Compounds; D003102:Colloids; D018036:Selenium Compounds; D013440:Sulfides; C018391:lead sulfide; D007854:Lead; C058667:cadmium selenide