Polarization Selective Color Filter Based on Plasmonic Nanograting Embedded Etalon Structures

Yonghee Jung; Hyunseung Jung; Hyunyong Choi; Hojin Lee

doi:10.1021/acs.nanolett.0c01738

Polarization Selective Color Filter Based on Plasmonic Nanograting Embedded Etalon Structures

Nano Lett. 2020 Sep 9;20(9):6344-6350. doi: 10.1021/acs.nanolett.0c01738. Epub 2020 Aug 24.

Authors

Yonghee Jung¹, Hyunseung Jung², Hyunyong Choi³, Hojin Lee^{1

2}

Affiliations

¹ Department of Information Communication, Materials, and Chemistry Convergence Technology, Soongsil University, Seoul 06978, South Korea.
² School of Electronic Engineering, Soongsil University, Seoul 06978, South Korea.
³ Department of Physics and Astronomy, Seoul National University, Seoul 08826, South Korea.

PMID: 32816490
DOI: 10.1021/acs.nanolett.0c01738

Abstract

In this paper, we propose a polarization-selective color filter that can generate two different color informations simultaneously depending on the polarization direction. The proposed color filter is mainly composed of the etalon structure to generate the color by the structural resonance properties while the upper layer of the etalon is made of plasmonic nanogratings to promote polarization-dependent color properties. When the duty ratio of the silver nanogratings is fixed, the proposed color filter can maintain identical optical properties for orthogonal polarization, while the etalon structure of the proposed color filter can manipulate different color information depending on the cavity height for the horizontal polarization. Finally, we experimentally confirm that polarization-dependent security images can be generated using the proposed color filters with a fixed duty ratio of various nanograting arrays.

Keywords: Structural color; color printing; etalon; nanograting; plasmonics.