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Intrinsic Optical Properties and Enhanced Plasmonic Response of Epitaxial Silver
Author(s) -
Wu Yanwen,
Zhang Chengdong,
Estakhri N. Mohammadi,
Zhao Yang,
Kim Jisun,
Zhang Matt,
Liu XingXiang,
Pribil Greg K.,
Alù Andrea,
Shih ChihKang,
Li Xiaoqin
Publication year - 2014
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201401474
Subject(s) - materials science , plasmon , permittivity , epitaxy , surface plasmon polariton , surface plasmon , optoelectronics , grain boundary , polariton , optics , condensed matter physics , dielectric , nanotechnology , microstructure , layer (electronics) , composite material , physics
Using atomically smooth epitaxial silver films , new optical permittivity highlighting significant loss reduction in the visible frequency range is extracted. Largely enhanced propagation distances of surface plasmon polaritons are measured, confirming the low intrinsic loss in silver. The new permittivity is free of extrinsic spectral features associated with grain boundaries and localized plasmons inevitably present in thermally deposited films.