Light tunable plasmonic metasurfaces
Abstract
Self-assembled plasmonic metasurfaces are promising optical platforms to achieve accessible flat optics, due to their strong light-matter interaction, nanometer length scale precision, large area, light weight, and high-throughput fabrication. Here, using photothermal continuous wave laser lithography, we show the spectral and spatial tuning of metasurfaces comprised of a monolayer of ligand capped hexagonally packed gold nanospheres. To tune the spectral response of the metasurfaces, we show that by controlling the intensity of a laser focused onto the metasurface that the absorption peak can be reconfigured from the visible to near-infrared wavelength. The irreversible spectral tuning mechanism is attributed to photothermal modification of the surface morphology. Combining self-assembled metasurfaces with laser lithography, we demonstrate an optically thin (λ/42), spectrally selective plasmonic Fresnel zone plate. This work establishes a new pathway for creating flat, large area, frequency selective optical elements using self-assembled plasmonic metasurfaces and laser lithography.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 17, 2020
- Source ID
- 10.1364/oe.396118
Entities
People
- Alberto Piqué
- Heungsoo Kim
- Jake Fontana
- Jawad Naciri
- Jeffrey Geldmeier
- Kristin Charipar
- Nicholas Charipar
- Paul Johns
- Ryan J. Suess
- Scott A Trammell
Organizations
- Office of Naval Research