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Title: Self-Assembled, Nanostructured, Tunable Metamaterials via Spinodal Decomposition

Journal Article · · ACS Nano
 [1];  [2];  [3];  [1];  [4];  [2];  [2];  [2];  [2];  [1];  [1];  [1]
  1. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Univ. of California, Berkeley, CA (United States)
  3. Hubei Univ., Wuhan (China)
  4. Univ. of Illinois, Urbana-Champaign, IL (United States)

Self-assembly via nanoscale phase separation offers an elegant route to fabricate nanocomposites with physical properties unattainable in single-component systems. One important class of nanocomposites are optical metamaterials which exhibit exotic properties and lead to opportunities for agile control of light propagation. Such metamaterials are typically fabricated via expensive and hard-to-scale top-down processes requiring precise integration of dissimilar materials. In turn, there is a need for alternative, more efficient routes to fabricate large-scale metamaterials for practical applications with deep-subwave length resolution. Here, we demonstrate a bottom-up approach to fabricate scalable nanostructured metamaterials via spinodal decomposition. To demonstrate the potential of such an approach, we leverage the innate spinodal decomposition of the VO2-TiO2 system, the metal-to-insulator transition in VO2, and thin-film epitaxy, to produce self-organized nanostructures with coherent interfaces and a structural unit cell down to 15 nm (tunable between horizontally and vertically aligned lamellae) wherein the iso-frequency surface is temperature-tunable from elliptic to hyperbolic dispersion producing metamaterial behavior. These results provide an efficient route for the fabrication of nanostructured metamaterials and other nanocomposites for desired functionalities.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1530260
Journal Information:
ACS Nano, Vol. 10, Issue 11; ISSN 1936-0851
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 44 works
Citation information provided by
Web of Science

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Cited By (17)

Tunable metasurfaces for visible and SWIR applications journal January 2020
Multi-nanolayered VO2/Sapphire Thin Film via Spinodal Decomposition journal March 2018
Self-assembly of high-index faceted gold nanocrystals to fabricate tunable coupled plasmonic superlattices journal January 2018
Thermally tunable VO 2 -SiO 2 nanocomposite thin-film capacitors journal March 2018
Distinctive phase separation dynamics of polymer blends: roles of Janus nanoparticles journal January 2019
Reconfigurable infrared hyperbolic metasurfaces using phase change materials journal October 2018
Tunable physical properties in BiAl 1−x Mn x O 3 thin films with novel layered supercell structures journal January 2020
Self-Assembled Ordered Three-Phase Au-BaTiO 3 -ZnO Vertically Aligned Nanocomposites Achieved by a Templating Method journal December 2018
New Self‐Organization Route to Tunable Narrowband Optical Filters and Polarizers Demonstrated with ZnO–ZnWO 4 Eutectic Composite journal January 2020
Template-Directed Solidification of Eutectic Optical Materials journal March 2018
Physical vapour deposition of vanadium dioxide for thermochromic smart window applications journal January 2019
Amphiphilic diblock copolymer-mediated structure control in nanoporous germanium-based thin films journal January 2019
Readily available titania nanostructuring routines based on mobility and polarity controlled phase separation of an amphiphilic diblock copolymer journal January 2018
VO 2 as a natural optical metamaterial journal January 2018
Ptychographic X-ray tomography reveals additive zoning in nanocomposite single crystals journal January 2020
Ptychographic X-ray tomography reveals additive zoning in nanocomposite single crystals text January 2020
Natural and induced growth of VO2 (M) on VO2 (B) ultrathin films journal May 2018

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