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Title: Design of 3D Oxide–Metal Hybrid Metamaterial for Tailorable Light–Matter Interactions in Visible and Near-Infrared Region

Journal Article · · Advanced Optical Materials

Abstract Dielectric–metallic hybrid metamaterials exhibit extraordinary optical properties due to the light–matter interactions at the dielectric–metallic interfaces. The ability in precision control of the light–matter interactions in nanoscale is key to tailor the optical properties of hybrid metamaterials. In this work, a complex 3D framework of multilayered self‐assembled BaTiO 3 (BTO)‐Au hybrid thin films is demonstrated with such precision control of the light–matter interaction in nanoscale. Unique “bamboo‐like” Au nanostructures are formed via the bilayer and trilayer stacking of BTO‐Au hybrid layers with interlayers of SrTiO 3 , CeO 2 , or MgO. Different film strain states introduced by the three interlayers result in variable diameter and density of Au nanopillars. Both simulated and experimental optical data demonstrate the localized surface plasmon resonance change and hyperbolic dispersion wavelength shift in visible to near‐infrared because of the effective tuning of the Au nanopillar aspect ratio and free electron density. The highly tunable optical properties along with the ferroelectric behavior and thermal robustness of the 3D hybrid film enable it to be a great candidate for multifunctional applications. This study demonstrates a unique 3D approach for precision optical property tuning and combined functionalities in oxide–metal metamaterial systems toward future integrated photonic and electronic devices.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE National Nuclear Security Administration (NNSA); US Department of the Navy, Office of Naval Research (ONR)
Grant/Contract Number:
AC04-94AL85000; SC0020077; NA0003525; N00014-17-1-2087; N00014-20-1-2043
OSTI ID:
1738926
Alternate ID(s):
OSTI ID: 1785770
Report Number(s):
SAND-2020-13468J; 692709
Journal Information:
Advanced Optical Materials, Vol. 9, Issue 1; ISSN 2195-1071
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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