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Title: Enhanced third harmonic generation from the epsilon-near-zero modes of ultrathin films

We experimentally demonstrate efficient third harmonic generation from an indium tin oxide nanofilm (λ/42 thick) on a glass substrate for a pump wavelength of 1.4 μm. A conversion efficiency of 3.3 × 10{sup −6} is achieved by exploiting the field enhancement properties of the epsilon-near-zero mode with an enhancement factor of 200. This nanoscale frequency conversion method is applicable to other plasmonic materials and reststrahlen materials in proximity of the longitudinal optical phonon frequencies.
Authors:
; ;  [1] ;  [2] ; ;  [3] ; ;  [1] ;  [1] ;  [4] ;  [5]
  1. Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185 (United States)
  2. (CINT), Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185 (United States)
  3. National Research Council–AMRDEC, Charles M. Bowden Research Laboratory, Redstone Arsenal, Alabama 35898 (United States)
  4. (CINT-LANL), Los Alamos Laboratories, Los Alamos, New Mexico 87545 (United States)
  5. Charles M. Bowden Research Laboratory, AMRDEC, U.S. Army RDECOM, Redstone Arsenal, Alabama 35898 (United States)
Publication Date:
OSTI Identifier:
22398884
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 15; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CONVERSION; EFFICIENCY; GLASS; HARMONIC GENERATION; INDIUM COMPOUNDS; NANOSTRUCTURES; PHONONS; SUBSTRATES; THIN FILMS; TIN OXIDES