Surface plasmon-enhanced emission from Ag-coated Ce doped Y3Al5O12 thin films phosphor capped with a dielectric layer of SiO2

Abstract

The effect of a surface plasmon (SP) on the yellow emission of Ce doped Y3Al5O12 (YAG:Ce) phosphor thin films was studied. The coating of YAG:Ce thin films with silver nanoislands on a 3-nm-thick SiO2 spacer significantly enhanced their photoluminescence (PL). The PL enhancement is caused by the resonant coupling of photoemission in YAG:Ce into SP and the electric field of incident light at the metal interfaces. Varying the mass thickness and the annealing condition of the Ag layer indicated that the PL intensity was highest at an Ag mass thickness of 20 nm. Therefore, yellow emission was enhanced by tuning the matching conditions of thin film phosphor-SP coupling by controlling the structure of silver nanoislands. The PL intensity can be further and remarkably enhanced by capping Ag islands with a 10-nm-thick SiO2 layer as a dielectric medium.

Hybrid plasmonic-photonic modes in diffractive arrays of nanoparticles coupled to light-emitting optical waveguides

“…In this section we demonstrate the modified emission of the YAG:Ce layer simultaneously coupled to quasiguided modes and SLRs. Recently, an enhancement of the emission from a YAG:Ce layer, mediated by Ag islands randomly deposited on top of the layer, was reported [43]. However, no modified emission spectrum or directionality were achieved.…”

Modulated Luminescence of Lanthanide Materials by Local Surface Plasmon Resonance Effect

“…Similar results were also obtained by using Au nanofilms with Ln 3+ -doped (β-NaYF 4 : Yb 3+ /Er 3+ ) UCNPs [ 54 ]. The influence of distance between lanthanide-doped films and NPs films on luminescence enhancement was further performed by introducing space layer [ 55 ]. Kushlyk and his co-workers researched the Ce 3+ and Yb 3+ co-doped system with different NPs concentrations and sizes and proposed that plasmonic enhancement and quenching effect is a competition [ 56 ].…”

Investigation of Purcell Factor for an Activator Ion due to Surface Plasmon Modes

“…The presence of a metallic surface affects the luminescence characteristics of a nearby optically active ion. This feature has been exploited in solid state light sources to extract light form within the LEDs [2][3][4][5][6][7][8][9][10][11] and to extract more photons from both the LED and the phosphor composites [12][13][14][15][16][17][18][19][20][21][22][23] in specific configurations. Many lighting laboratories are exploring plasmon-structured LED surfaces and phosphor composites to extract more light in certain directions.…”