Laser-induced spatially-selective tailoring of high-index dielectric metasurfaces
Year: 2019
Type: article
Abstract: Optically resonant high-index dielectric metasurfaces featuring Mie-type electric and magnetic resonances are usually fabricated by means of planar technologies, which limit the degrees of freedom in tunability and scalability of the fabricated systems. Therefore, we propose a complimentary post-processing technique based on ultrashort (≤ 10 ps) laser pulses. The process involves thermal effects: crystallization and reshaping, while the heat is localized by a high-precision positioning of the focused laser beam. Moreover, for the first time, the resonant behavior of dielectric metasurface elements is exploited to engineer a specific absorption profile, which leads to a spatially-selective heating and a customized modification. Such technique has the potential to reduce the complexity in the fabrication of non-uniform metasurface-based optical elements. Two distinct cases, a spatial pixelation of a large-scale metasurface and a height modification of metasurface elements, are explicitly demonstrated.
Source: Optics Express
DOI: 10.1364/oe.380383
Authors: Jonas Berzinš, Simonas Indrišiūnas, Stefan Fasold, Michael Steinert, Olga Žukovskaja, Dana Cialla-May, Paulius Gečys, Stefan M. B. Bäumer, Thomas Pertsch, Frank Setzpfandt
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,270
Awards: G1293980565, G2096220122, G2266548872, Zentrum für Innovationskompetenz - Verbundprojekt: astrOOptics, TP2: astrooptic components, G2399585125, Zwanzig20 - Allianz 3D Sensation, HOLOsurf - Generation dreidimensionaler visueller Oberflächenerscheinungen mittels mikro- und nanostrukturierter Schichtsysteme, Lossless Photon management – Optical design for manufacture at different length scales, Zwanzig20 - Transformationsoptik für multidimensionale Detektion
OpenAlex ID: W2995119204