Next Article in Journal
Metal-Based Nanoparticles as Antimicrobial Agents: An Overview
Previous Article in Journal
PMMA Thin Film with Embedded Carbon Quantum Dots for Post-Fabrication Improvement of Light Harvesting in Perovskite Solar Cells
Previous Article in Special Issue
Fabrication and Characterization of a Metallic–Dielectric Nanorod Array by Nanosphere Lithography for Plasmonic Sensing Application
Open AccessArticle

Optical Properties of Electrically Active Gold Nanoisland Films Enabled with Interfaced Liquid Crystals

1
Department of Chemistry, National Taiwan Normal University, 88 Ting-Chow Rd., Sec. 4, Taipei 11677, Taiwan
2
Graduate Institute of Nanomedicine and Medical Engineering, Taipei Medical University, 250 Wuxing St., Taipei 11031, Taiwan
3
International PhD Program for Biomedical Engineering, Taipei Medical University, 250 Wuxing St., Taipei 11031, Taiwan
4
Department of Photonics, National Sun Yat-Sen University, 70 Lienhai Rd., Kaohsiung 80424, Taiwan
5
Department of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, UK
6
Graduate Institute of Biomedical Optomechatronics, Taipei Medical University, 250 Wuxing St., Taipei 11031, Taiwan
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Nanomaterials 2020, 10(2), 290; https://doi.org/10.3390/nano10020290
Received: 25 November 2019 / Revised: 19 December 2019 / Accepted: 4 February 2020 / Published: 9 February 2020
(This article belongs to the Special Issue Nanobiophotonics, Photomedicine, and Imaging)
A system comprising a gold nanoisland film (Au NIF) covered with a liquid crystal (LC) material is introduced. By applying a voltage across the LC bulk, we demonstrate that changes in the refractive-index and orientation significantly modified the hybrid plasmonic–photonic resonances of the Au NIF. The hybrid structure enabled active control of the spectrum of the resonance wavelength of the metallic nanoisland by means of an externally applied electric field. Our modeling supports the observed results in LC/Au NIF. In a combination of the nanostructured surface with birefringent LCs, nonpolarized wavelength tunability of ~15 nm and absorbance tunability of ~0.024 were achieved in the visible wavelength, opening the door to optical devices and nanoscale sensors. View Full-Text
Keywords: liquid crystal; optical device; gold nanoisland film liquid crystal; optical device; gold nanoisland film
Show Figures

Figure 1

MDPI and ACS Style

Yen, H.-C.; Kuo, T.-R.; Wang, C.-T.; Lin, J.-D.; Chen, C.-C.; Hsiao, Y.-C. Optical Properties of Electrically Active Gold Nanoisland Films Enabled with Interfaced Liquid Crystals. Nanomaterials 2020, 10, 290.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop