title: Active liquid crystal tuning of metallic nanoantenna enhanced light emission from colloidal quantum dots.
abstract: A system comprising an aluminum nanoantenna array on top of a luminescent colloidal quantum dot waveguide and covered by a thermotropic liquid crystal (LC) is introduced. By heating the LC above its critical temperature, we demonstrate that the concomitant refractive index change modifies the hybrid plasmonic-photonic resonances in the system. This enables active control of the spectrum and directionality of the narrow-band (∼6 nm) enhancement of quantum dot photoluminescence by the metallic nanoantennas.
authors.affiliation: Solar Cells Group, Department of Electronic and Information Systems (ELIS), Ghent University , Sint-Pietersnieuwstraat 41, B-9000 Ghent, Belgium.
authors.forename: Aimi
authors.initials: A
authors.lastname: Abass
authors.forename: Said Rahimzadeh-Kalaleh
authors.initials: SR
authors.lastname: Rodriguez
authors.forename: Thomas
authors.initials: T
authors.lastname: Ako
authors.forename: Tangi
authors.initials: T
authors.lastname: Aubert
authors.forename: Marc
authors.initials: M
authors.lastname: Verschuuren
authors.forename: Dries
authors.initials: D
authors.lastname: Van Thourhout
authors.forename: Jeroen
authors.initials: J
authors.lastname: Beeckman
authors.forename: Zeger
authors.initials: Z
authors.lastname: Hens
authors.forename: Jaime
authors.initials: J
authors.lastname: Gómez Rivas
authors.forename: Bjorn
authors.initials: B
authors.lastname: Maes
keywords: Waveguide; fluorescence; liquid crystal; nanoantenna; quantum dot