2D plasmonic and diffractive structures with sharp features by UV laser patterning

0398514 - FZÚ 2014 RIV GB eng J - Journal Article
Peláez, R.J. - Afonso, C.N. - Bulíř, Jiří - Novotný, Michal - Lančok, Ján - Piksová, K.
2D plasmonic and diffractive structures with sharp features by UV laser patterning.
Nanotechnology. Roč. 24, č. 9 (2013), "095301-1"-"095301-7". ISSN 0957-4484. E-ISSN 1361-6528
R&D Projects: GA AV ČR IAA100100718
Institutional support: RVO:68378271
Keywords : silver thin film * silver nanoparticles * plasmonics * diffractive structures * laser processing
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 3.672, year: 2013

The aim of this work is to produce 2D plasmonic and diffractive structures in Ag films with sharp features for which both a deeper understanding of laser induced transformation upon modulated laser intensity and a correlation between structural and optical properties are required. We compare results obtained by exposing silver films to an excimer laser operating at 193 nm whose intensity is either modulated or homogeneous. In all cases, one laser exposure is enough to break the film into nanoparticles (NPs). The use of the modulated beam intensity leads to diffractive 2D patterns that are formed by rectangular regions of untransformed material surrounded by transformed regions covered by NPs. The former have sharp edges that are consistent with the absence of significant mass transport that is discussed in terms of the thermal gradient induced. The latter contain NPs whose diameter increases as the initial film effective thickness increases.
Permanent Link: http://hdl.handle.net/11104/0226001