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Title: Experimental verification of epsilon-near-zero plasmon polariton modes in degenerately doped semiconductor nanolayers

Here, we investigate optical polariton modes supported by subwavelength-thick degenerately doped semiconductor nanolayers (e.g. indium tin oxide) on glass in the epsilon-near-zero (ENZ) regime. The dispersions of the radiative (R, on the left of the light line) and non-radiative (NR, on the right of the light line) ENZ polariton modes are experimentally measured and theoretically analyzed through the transfer matrix method and the complex-frequency/real-wavenumber analysis, which are in remarkable agreement. We observe directional near-perfect absorption using the Kretschmann geometry for incidence conditions close to the NR-ENZ polariton mode dispersion. Along with field enhancement, this provides us with an unexplored pathway to enhance nonlinear optical processes and to open up directions for ultrafast, tunable thermal emission.
Authors:
 [1] ;  [2] ;  [3] ;  [1] ;  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Texas A&M Univ.-Corpus Christi, Corpus Christi, TX (United States)
  3. AMRDEC, Charles M. Bowden Research Lab., Redstone Arsenal, AL (United States). National Research Council
Publication Date:
OSTI Identifier:
1297916
Report Number(s):
SAND--2016-7499J
Journal ID: ISSN 1094-4087; OPEXFF; 646521
Grant/Contract Number:
AC04-94AL85000
Type:
Accepted Manuscript
Journal Name:
Optics Express
Additional Journal Information:
Journal Volume: 24; Journal Issue: 16; Journal ID: ISSN 1094-4087
Publisher:
Optical Society of America (OSA)
Research Org:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY thin films; subwavelength structures; nanostructures; optical properties; surface plasmons