Laser-Splashed Three-Dimensional Plasmonic Nanovolcanoes for Steganography in Angular Anisotropy

ACS Nano
Dejiao HuXiangping Li

Abstract

Planar optics constructed from subwavelength artificial atoms have been suggested as a route to the physical realization of steganography with controlled intrinsic redundancy at single-pixel levels. Unfortunately, two-dimensional geometries with uniform flat profiles offer limited structural redundancy and make it difficult to create advanced crypto-information in multiplexed physical divisions. Here, we reveal that splashing three-dimensional (3D) plasmonic nanovolcanoes could allow for a steganographic strategy in angular anisotropy, with high resolution, full coloration, and transient control of structural profiles. Highly reproducible 3D morphologies of volcanic nanosplashes are demonstrated by creating a standardized recipe of laser parameters. Such single nanovolcanoes can be well controlled individually at different splashing stages and thus provide a lithography-free fashion to access various spectral responses of angularly coordinated transverse and vertical modes, leading to the full-range coloration. This chip-scale demonstration of steganographic color images in angular anisotropy unfolds a long-ignored scheme for structured metasurfaces and thereby provides a paradigm for information security and anticounterfeiting.

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Citations

May 16, 2020·Light, Science & Applications·Xiyue ZhangLei Zhou
Nov 23, 2019·Light, Science & Applications·Jiancai XueXue-Hua Wang
Feb 21, 2021·Nature Communications·Dejiao HuXiangping Li
Mar 26, 2021·ACS Applied Materials & Interfaces·Xin ZhengFushan Li
May 7, 2021·Light, Science & Applications·Xiyue ZhangLei Zhou
Dec 12, 2018·ACS Nano·Alexander S RobertsSergey I Bozhevolnyi
Aug 25, 2020·Nano Letters·Yingwei WangXiangping Li
Mar 5, 2019·ACS Applied Materials & Interfaces·Yeong Jae KimYoung Min Song
Oct 2, 2021·Advanced Materials·Qin ChenLong Wen
Sep 8, 2021·Chemical Reviews·Chunghwan JungJunsuk Rho

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