Universität zu Köln

Mischok, Andreas ORCID: 0000-0003-4725-7404, Hale, Nathan ORCID: 0000-0003-3622-1780, Gather, Melte C. and Di Falco, Andrea ORCID: 0000-0002-7338-8785 (2021). Effective permittivity of co-evaporated metal-organic mixed films. J. Appl. Phys., 129 (8). MELVILLE: AIP Publishing. ISSN 1089-7550

Full text not available from this repository.

Abstract

The combination of organics and metals in a composite film holds promise for combining plasmonic interaction with gain and for the realization of epsilon-near-zero (ENZ) metamaterials. In particular, fluorescent organic dyes can be used to compensate the plasmonic losses of a homogenized metal-organic material. Here, we fabricate such films through thermal co-evaporation of silver and an organic host:guest system and investigate experimentally the resulting linear optical properties for varying metal concentrations. We extract the effective permittivity of the resulting films with ellipsometry measurements and demonstrate the formation of silver nanoparticles, resulting in strongly localized surface plasmon resonances until a percolation threshold is reached. Through enhanced light-matter interaction, we observe a maximum of the photoluminescence for a concentration of 15% in volume of metal in the composite material. These results showcase a variety of growth parameters and will be useful for the future design of gain-compensated plasmonics and ENZ metamaterials.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Mischok, Andreas UNSPECIFIED orcid.org/0000-0003-4725-7404 UNSPECIFIED Hale, Nathan UNSPECIFIED orcid.org/0000-0003-3622-1780 UNSPECIFIED Gather, Melte C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Di Falco, Andrea UNSPECIFIED orcid.org/0000-0002-7338-8785 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-574161
DOI:	10.1063/5.0038899
Journal or Publication Title:	J. Appl. Phys.
Volume:	129
Number:	8
Date:	2021
Publisher:	AIP Publishing
Place of Publication:	MELVILLE
ISSN:	1089-7550
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language SURFACE-PLASMON RESONANCE; SOLAR-CELLS; SILVER; GAIN; NANOPARTICLES Multiple languages Physics, Applied Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/57416