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Title: Fabrication and performance of polymer-nanocomposite anti-reflective thin films deposited by RIR-MAPLE

Design of polymer anti-reflective (AR) optical coatings for plastic substrates is challenging because polymers exhibit a relatively narrow range of refractive indices. Here, we report synthesis of a four-layer AR stack using hybrid polymer: nanoparticle materials deposited by resonant infrared matrix-assisted pulsed laser evaporation. An Er: YAG laser ablated frozen solutions of a high-index composite containing TiO2 nanoparticles and poly(methylmethacrylate) (PMMA), alternating with a layer of PMMA. The optimized AR coatings, with thicknesses calculated using commercial software, yielded a coating for polycarbonate with transmission over 97 %, scattering <3 %, and a reflection coefficient below 0.5 % across the visible range, with a much smaller number of layers than would be predicted by a standard thin film calculation. The TiO2 nanoparticles contribute more to the enhanced refractive index of the high-index layers than can be accounted for by an effective medium model of the nanocomposite.
; ; ; ;  [1] ;  [2] ;  [3]
  1. W&M, JLAB
  2. W&M
Publication Date:
OSTI Identifier:
Report Number(s):
JLAB-ACC-14-1929; DOE/OR/23177-3287
Journal ID: ISSN 0947-8396
DOE Contract Number:
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics. A, Materials Science and Processing; Journal Volume: 117; Journal Issue: 3
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States