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Core-shell metallic alloy nanopillars-in-dielectric hybrid metamaterials with magneto-plasmonic coupling

Journal Article · · Materials Today
 [1];  [2];  [3];  [3];  [2];  [2];  [2];  [4];  [5];  [2];  [2];  [4];  [2];  [3];  [2];  [2]
  1. Sun Yat-Sen Univ., Guangzhou (China); Purdue Univ., West Lafayette, IN (United States)
  2. Purdue Univ., West Lafayette, IN (United States)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  4. Univ. of Nebraska, Lincoln, NE (United States)
  5. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Combining plasmonic and magnetic properties, namely magneto-plasmonic coupling, inspires great research interest and the search for magneto-plasmonic nanostructure becomes considerably critical. In this work, we designed a nanopillar-in-matrix structure with core–shell alloyed nanopillars for both BaTiO3 (BTO)-Au0.5Co0.5 (AuCo) and BTO-Au0.25Cu0.25Co0.25Ni0.25 (AuCuCoNi) hybrid systems, i.e., ferromagnetic alloy cores (e.g., Co or CoNi) with plasmonic shells (e.g., Au or Au/Cu). These core–shell alloy nanopillars are uniformly embedded into a dielectric BTO matrix to form a vertically aligned nanocomposite (VAN) structure. Both hybrid systems present excellent epitaxial quality and interesting multi-functionality, e.g., high magnetic anisotropy, magneto-optical coupling response, tailorable plasmonic resonance wavelength, tunable hyperbolic properties and strong optical anisotropy. These alloyed nanopillars-in-matrix designs provide enormous potential for complex hybrid material designs with multi-functionality and demonstrate strong interface enabled magneto-plasmonic coupling along with plasmonic and magnetic performance.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); US Department of the Navy, Office of Naval Research (ONR); Guangdong Basic and Applied Basic Research Foundation
Grant/Contract Number:
89233218CNA000001; NA0003525; SC0020077
OSTI ID:
1832396
Alternate ID(s):
OSTI ID: 1834114
Report Number(s):
LA-UR--21-28792
Journal Information:
Materials Today, Journal Name: Materials Today Vol. 51; ISSN 1369-7021
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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