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Title: Low-Loss Near-Infrared Hyperbolic Metamaterials with Epitaxial ITO-In 2O 3 Multilayers

Artificial metamaterials with hyperbolic dispersions exhibit unusual optical properties not found in Nature. Such hyperbolic metamaterials (HMMs) permit the access to and control of electromagnetic waves with large wave vectors. An important criterion for multilayer-based HMMs is whether the thickness of each individual layer can be far below the operating wavelength while still maintaining the material and interfacial quality. Here in this paper, we report heteroepitaxial growth of HMMs composed of multilayers of ultrathin indium tin oxide (ITO) and indium oxide (In 2O 3) films. In conclusion, the disparate metallic and dielectric properties of the individual building blocks, in conjunction with the good carrier mobility and film morphology enable a low-loss infrared HMM platform on which we demonstrate ultrafast optical switching and the enhancement of the radiative decay rate of PbS quantum dots in the telecommunication wavelength regime.
Authors:
ORCiD logo [1] ; ORCiD logo [2] ; ORCiD logo [3] ; ORCiD logo [4] ; ORCiD logo [3] ; ORCiD logo [5] ;  [6] ; ORCiD logo [7] ;  [8] ; ORCiD logo [9]
  1. Argonne National Lab. (ANL), Argonne, IL (United States). Center for Nanoscale Materials
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Center for Nanoscale Materia
  3. Northwestern Univ., Evanston, IL (United States). Materials Research Center; Northwestern Univ., Evanston, IL (United States). Dept. of Chemistry
  4. Northwestern Univ., Evanston, IL (United States). Materials Research Center; Northwestern Univ., Evanston, IL (United States). Applied Physics Program
  5. Northwestern Univ., Evanston, IL (United States). Materials Research Center; Northwestern Univ., Evanston, IL (United States). Applied Physics Program; Northwestern Univ., Evanston, IL (United States). Dept. of Materials Science and Engineering
  6. Northwestern Univ., Evanston, IL (United States). Dept. of Chemistry; Flexterra Inc., Skokie, IL (United States)
  7. Northwestern Univ., Evanston, IL (United States). Materials Research Center; Northwestern Univ., Evanston, IL (United States). Dept. of Chemistry; Northwestern Univ., Evanston, IL (United States). Applied Physics Program
  8. Northwestern Univ., Evanston, IL (United States). Materials Research Center; Northwestern Univ., Evanston, IL (United States). Dept. of Materials Science
  9. Argonne National Lab. (ANL), Argonne, IL (United States). Center for Nanoscale Materia; Northwestern Univ., Evanston, IL (United States). Dept. of Chemistry
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
ACS Photonics
Additional Journal Information:
Journal Volume: 5; Journal Issue: 5; Journal ID: ISSN 2330-4022
Publisher:
American Chemical Society (ACS)
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
National Science Foundation (NSF); W.M. Keck Foundation; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; epitaxial growth; hyperbolic metamaterials; indium oxide (In2O3); indium tin oxide (ITO); lead sulfide (PbS) quantum dots; transient absorption
OSTI Identifier:
1461461