Issue 17, 2016

Lithographically-generated 3D lamella layers and their structural color

Abstract

Inspired by the structural color from the multilayer nanophotonic structures in Morpho butterfly wing scales, 3D lamellae layers in dielectric polymers (polymethyl methacrylate, PMMA) with n ∼ 1.5 were designed and fabricated by standard top-down electron beam lithography with one-step exposure followed by an alternating development/dissolution process of PMMA/LOR (lift-off resist) multilayers. This work offers direct proof of the structural blue/green color via lithographically-replicated PMMA/air multilayers, analogous to those in real Morpho butterfly wings. The success of nanolithography in this work for the 3D lamellae structures in dielectric polymers not only enables us to gain deeper insight into the mysterious blue color of the Morpho butterfly wings, but also breaks through the bottleneck in technical development toward broad applications in gas/liquid sensors, 3D meta-materials, coloring media, and infrared imaging devices, etc.

Graphical abstract: Lithographically-generated 3D lamella layers and their structural color

Article information

Article type
Communication
Submitted
01 Feb 2016
Accepted
05 Apr 2016
First published
08 Apr 2016

Nanoscale, 2016,8, 9118-9127

Author version available

Lithographically-generated 3D lamella layers and their structural color

S. Zhang, Y. Chen, B. Lu, J. Liu, J. Shao and C. Xu, Nanoscale, 2016, 8, 9118 DOI: 10.1039/C6NR00936K

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