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Engineering optical properties of a graphene oxide metamaterial assembled in microfluidic channels.

Authors
  • Kravets, V G
  • Marshall, O P
  • Nair, R R
  • Thackray, B
  • Zhukov, A
  • Leng, J
  • Grigorenko, A N
Type
Published Article
Journal
Optics Express
Publisher
The Optical Society
Publication Date
Jan 26, 2015
Volume
23
Issue
2
Pages
1265–1275
Identifiers
DOI: 10.1364/OE.23.001265
PMID: 25835885
Source
Medline
License
Unknown

Abstract

The dense packing of two dimensional flakes by van der Waals forces has enabled the creation of new metamaterials with desirable optical properties. Here we assemble graphene oxide sheets into a three dimensional metamaterial using a microfluidic technique and confirm their ordering via measurements of ellipsometric parameters, polarized optical microscopy, polarized transmission spectroscopy, infrared spectroscopy and scanning electron microscopy. We show that the produced metamaterials demonstrate strong in-plane optical anisotropy (Δn≈0.3 at n≈1.5-1.8) combined with low absorption (k<0.1) and compare them with as-synthesized samples of graphene oxide paper. Our results pave the way for engineered birefringent metamaterials on the basis of two dimensional atomic crystals including graphene and its derivatives.

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