Photoluminescence emission from Alq3 organic layer in metal-Alq3-metal plasmonic structure

• Published in: Applied surface science Vol. 303; pp. 319 - 323
• Main Authors: HUANG, Bohr-Ran, LIAO, Chung-Chi, FAN, Wan-Ting, WU, Jin-Han, CHEN, Cheng-Chang, LIN, Yi-Ping, LI, Jung-Yu, CHEN, Shih-Pu, KE, Wen-Cheng, CHEN, Nai-Chuan
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier 01.06.2014
• Subjects: Competition; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Embedded structures; Emission; Emission analysis; Exact sciences and technology; Excitons; Photoluminescence; Physics; Plasmonics; Metal-insulator-metal (MIM); Aluminium complexes; Dispersion relations; Oxine; Dispersion relation; Photoluminescence; Organic ligand; Surface plasmon polarition (SPP); Surface plasmons; Light extraction efficiency
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2014.02.175

The emission properties of an organic layer embedded in a metal-organic-metal (MOM) structure were investigated. A partially radiative odd-SPW as well as a non-radiative even-SPW modes are supported by hybridization of the SPW modes on the opposite organic/metal interface in the structure. Because of the competition by this radiative SPW, the population of excitons that recombine to form non-radiative SPW should be reduced. This may account for why the photoluminescence intensity of the MOM sample is higher than that of an organic-metal sample even though the MOM sample has an additional metal layer that should intuitively act as a filter.