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Title: Near-field spectroscopic investigation of dual-band heavy fermion metamaterials

Broadband tunability is a central theme in contemporary nanophotonics and metamaterials research. Combining metamaterials with phase change media offers a promising approach to achieve such tunability, which requires a comprehensive investigation of the electromagnetic responses of novel materials at subwavelength scales. In this work, we demonstrate an innovative way to tailor band-selective electromagnetic responses at the surface of a heavy fermion compound, samarium sulfide (SmS). By utilizing the intrinsic, pressure sensitive, and multi-band electron responses of SmS, we create a proof-of-principle heavy fermion metamaterial, which is fabricated and characterized using scanning near-field microscopes with < 50 nm spatial resolution. The optical responses at the infrared and visible frequency ranges can be selectively and separately tuned via modifying the occupation of the 4f and 5d band electrons. The unique pressure, doping, and temperature tunability demonstrated represents a paradigm shift for nanoscale metamaterial and metasurface design.
ORCiD logo [1] ;  [1] ;  [2] ;  [3] ;  [1] ;  [3] ;  [1] ;  [1] ;  [4] ; ORCiD logo [4] ;  [5] ;  [6] ; ORCiD logo [7] ;  [8] ;  [3] ;  [9] ;  [10] ;  [2] ;  [1]
  1. Stony Brook Univ., NY (United States)
  2. Univ. of Texas, Austin, TX (United States)
  3. Iowa State Univ., Ames, IA (United States)
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  5. Texas A & M Univ., College Station, TX (United States)
  6. National Inst. for Materials Science (NIMS), Tsukuba (Japan)
  7. Inst. for Molecular Science, Okasaki (Japan)
  8. Inst. for Molecular Science, Okasaki (Japan); Toyota Technological Inst., Nagoya (Japan)
  9. Inst. for Molecular Science, Okasaki (Japan); Nagoya Univ. (Japan)
  10. Nagoya Univ. (Japan)
Publication Date:
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 8; Journal Issue: 1; Journal ID: ISSN 2041-1723
Nature Publishing Group
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
SC-22.3 USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Scientific User Facilities Division
Country of Publication:
United States
OSTI Identifier: