April 22 - 26, 2024
Seattle, Washington
May 7 - 9, 2024 (Virtual)

Event Supporters

2024 MRS Spring Meeting
EL08.15.07

Configurationally Tunable Mie, Plasmonic and Diffractive Structural Colors in a Single Design

When and Where

Apr 25, 2024
5:00pm - 7:00pm
Flex Hall C, Level 2, Summit

Presenter(s)

Co-Author(s)

Youngji Kim1,2,Joshua Caldwell1,Jerome Hyun2

Vanderbilt University1,Ewha Womans University2

Abstract

Youngji Kim1,2,Joshua Caldwell1,Jerome Hyun2

Vanderbilt University1,Ewha Womans University2
We have developed a structural color design capable of displaying Mie resonant, plasmonic, and diffractive colors within a single design, depending on the configuration of imaging setup. Previous research achieved two distinct colors arising from the same resonance mechanism by introducing anisotropy into the structural parameters of a 2D array and selectively displaying each color based on the polarization. In this study, however, we store and display multiple colors within a single design by employing a 1D metallodielectric grating composed of TiO<sub>x</sub> nanowires sandwiched between two Ag layers. Choice of polarization allows for either an electric dipole Mie resonance or a localized surface plasmon resonance to occur independently, generating striking differences in color. Furthermore, the selection of numerical aperture (NA) can further extend the color modulation, as collected diffracted light wavelength is determined by the NA. We also demonstrate the color modes from the 1<sup>st</sup> order diffraction. All resonance mechanisms and imaging configurations depend solely on the two spatial parameters and their combination: the period and the width of the nanowire. Finally, we demonstrate four levels of encoded images produced from a single set of the gratings under different imaging setups. These findings open up new possibilities for applications, such as image encryption and data storage, and so on.

Keywords

metamaterial

Symposium Organizers

Yao-Wei Huang, National Yang Ming Chiao Tung University
Min Seok Jang, Korea Advanced Institute of Science and Technology
Ho Wai (Howard) Lee, University of California, Irvine
Pin Chieh Wu, National Cheng Kung University

Symposium Support

Bronze
APL Quantum
Kao Duen Technology Corporation
Nanophotonics Journal

Session Chairs

Ho Wai (Howard) Lee
Pin Chieh Wu

In this Session