title: Three-dimensional cavity nanoantennas with resonant-enhanced surface plasmons as dynamic color-tuning reflectors.
abstract: As plasmonic antennas for surface-plasmon-assisted control of optical fields at specific frequencies, metallic nanostructures have recently emerged as crucial optical components for fascinating plasmonic color engineering. Particularly, plasmonic resonant nanocavities can concentrate lightwave energy to strongly enhance light-matter interactions, making them ideal candidates as optical elements for fine-tuning color displays. Inspired by the color mixing effect found on butterfly wings, a new type of plasmonic, multiresonant, narrow-band (the minimum is about 45 nm), high-reflectance (the maximum is about 95%), and dynamic color-tuning reflector is developed. This is achieved from periodic patterns of plasmonic resonant nanocavities in free-standing capped-pillar nanostructure arrays. Such cavity-coupling structures exhibit multiple narrow-band selective and continuously tunable reflections via plasmon standing-wave resonances. Consequently, they can produce a variety of dark-field vibrant reflective colors with good quality, strong color signal and fine tonal variation at the optical diffraction limit. This proposed multicolor scheme provides an elegant strategy for realizing personalized and customized applications in ultracompact photonic data storage and steganography, colorimetric sensing, 3D holograms and other plasmon-assisted photonic devices.
authors.affiliation: National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Institute of Microelectronics, Peking University, China and Innovation Center for MicroNanoelectronics and Integrated System, Beijing 100871, People's Republic of China. wuwg@pku.edu.cn.
authors.forename: J R
authors.initials: JR
authors.lastname: Fan
authors.affiliation: National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Institute of Microelectronics, Peking University, China and Innovation Center for MicroNanoelectronics and Integrated System, Beijing 100871, People's Republic of China. wuwg@pku.edu.cn.
authors.forename: W G
authors.initials: WG
authors.lastname: Wu
authors.affiliation: National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Institute of Microelectronics, Peking University, China and Innovation Center for MicroNanoelectronics and Integrated System, Beijing 100871, People's Republic of China. wuwg@pku.edu.cn.
authors.forename: Z J
authors.initials: ZJ
authors.lastname: Chen
authors.affiliation: National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Institute of Microelectronics, Peking University, China and Innovation Center for MicroNanoelectronics and Integrated System, Beijing 100871, People's Republic of China. wuwg@pku.edu.cn.
authors.forename: J
authors.initials: J
authors.lastname: Zhu
authors.affiliation: Technical Institute of Physical and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: J
authors.initials: J
authors.lastname: Li