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Title: Engineering absorption and blackbody radiation in the far-infrared with surface phonon polaritons on gallium phosphide

We demonstrate excitation of surface phonon polaritons on patterned gallium phosphide surfaces. Control over the light-polariton coupling frequencies is demonstrated by changing the pattern periodicity and used to experimentally determine the gallium phosphide surface phonon polariton dispersion curve. Selective emission via out-coupling of thermally excited surface phonon polaritons is experimentally demonstrated. Samples are characterized experimentally by Fourier transform infrared reflection and emission spectroscopy, and modeled using finite element techniques and rigorous coupled wave analysis. The use of phonon resonances for control of emissivity and excitation of bound surface waves offers a potential tool for the exploration of long-wavelength Reststrahlen band frequencies.
Authors:
; ; ;  [1] ; ;  [2] ;  [3]
  1. Department of Electrical and Computer Engineering, University of Illinois Urbana Champaign, Urbana, Illinois 61801 (United States)
  2. Department of Physics and Applied Physics, University of Massachusetts Lowell, Lowell, Massachusetts 01854 (United States)
  3. Department of Electrical Engineering, University of Notre Dame, South Bend, Indiana 46556 (United States)
Publication Date:
OSTI Identifier:
22261614
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 13; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABSORPTION; BLACKBODY RADIATION; EMISSION SPECTROSCOPY; EXCITATION; FINITE ELEMENT METHOD; FOURIER TRANSFORMATION; GALLIUM; PHONONS; POLARONS; SURFACES; WAVE PROPAGATION