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Title: Strain-Driven In-plane Ordering in Vertically Aligned ZnO–Au Nanocomposites with Highly Correlated Metamaterial Properties

Journal Article · · ACS Omega
 [1];  [1];  [1];  [1]; ORCiD logo [2]
  1. School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
  2. School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States, School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, United States

Hyperbolic metamaterials demonstrate exotic optical properties that are poised to find applications in subdiffraction imaging and hyperlenses. Key challenges remain for practical applications, such as high energy losses and lack of hyperbolic properties in shorter wavelengths. In this work, a new oxide-metal (ZnO-Au) hybrid-material system in the vertically aligned nanocomposite thin-film form has been demonstrated with very promising in-plane two-phase ordering using a one-step growth method. Au nanopillars grow epitaxially in the ZnO matrix, and the pillar morphology, orientation, and quasi-hexagonal in-plane ordering are found to be effectively tuned by the growth parameters. Strong surface plasmon resonance has been observed in the hybrid system in the UV-vis range, and highly anisotropic dielectric properties have resulted with much broader and tunable hyperbolic wavelength regimes. The observed strain-driven two-phase in-plane ordering and its novel tunable hyperbolic metamaterial properties all demonstrate strong potential for future oxide-metal hybrid-material design toward future integrated hybrid photonics.

Research Organization:
Purdue Univ., West Lafayette, IN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
Grant/Contract Number:
SC0020077; DMR-1565822
OSTI ID:
1595503
Alternate ID(s):
OSTI ID: 1599004
Journal Information:
ACS Omega, Journal Name: ACS Omega Vol. 5 Journal Issue: 5; ISSN 2470-1343
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 25 works
Citation information provided by
Web of Science

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