Surface plasmon-waveguide hybrid polymer light-emitting devices using hexagonal Ag dots

Kwan Hyun Cho; Jin Yeong Kim; Dae-Geun Choi; Ki-Jung Lee; Jun-Hyuk Choi; Kyung Cheol Choi

doi:10.1364/OL.37.000761

Surface plasmon-waveguide hybrid polymer light-emitting devices using hexagonal Ag dots

Opt Lett. 2012 Mar 1;37(5):761-3. doi: 10.1364/OL.37.000761.

Authors

Kwan Hyun Cho¹, Jin Yeong Kim, Dae-Geun Choi, Ki-Jung Lee, Jun-Hyuk Choi, Kyung Cheol Choi

Affiliation

¹ Department of Electrical Engineering, KAIST, Daejeon, Korea.

PMID: 22378385
DOI: 10.1364/OL.37.000761

Abstract

We investigated surface plasmon-waveguide hybrid resonances for enhancement of light emission in polymer light-emitting diodes (PLEDs). Hybrid waveguide-plasmon resonances in the visible range for waveguide mode and near IR range for surface plasmons were observed by incorporation of hexagonal Ag dot arrays. Considerable overlap between the emission wavelength of the PLEDs and the waveguide mode by an Ag dot array with a lattice constant of 500 nm was observed. Because of enhanced light extraction by Bragg scattering of waveguide modes, photoluminescence (PL) and electroluminescence (EL) were increased by 70% and 50%, respectively.