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

被引:8
作者
Singaravelu, S. [1 ]
Mayo, D. C. [2 ]
Park, H. K. [1 ]
Schriver, K. E. [1 ]
Klopf, J. M. [3 ]
Kelley, M. J. [4 ]
Haglund, R. F., Jr. [2 ,5 ]
机构
[1] AppliFlex LLC, Nashville, TN 37211 USA
[2] Vanderbilt Univ, Interdisciplinary Mat Sci Program, Nashville, TN 37235 USA
[3] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA
[4] Coll William & Mary, Dept Appl Sci, Williamsburg, VA 23187 USA
[5] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA
来源
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2014年 / 117卷 / 03期
基金
美国国家科学基金会;
关键词
HIGH REFRACTIVE-INDEX; PULSED-LASER EVAPORATION; POLY(METHYL METHACRYLATE); TIO2;
D O I
10.1007/s00339-014-8566-1
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
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.
引用
收藏
页码:1415 / 1423
页数:9
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