Optical features of the gold nanoparticles deposited on ITO substrates
Optical features of the gold nanoparticles deposited on ITO substrates
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DOI：
10.1016/j.optcom.2010.09.012
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发表时间：
2011-01-01
影响因子：
2.4
通讯作者：
Umar, A. Ali
中科院分区：
文献类型：
--
作者：
Aziz, M. A.;Oyama, M.;Umar, A. Ali
首次研究了在双色1064 nm和双色激光（1064 nm 10 ns脉冲激光，脉冲功率密度532 nm 10 ns激光处理和连续波300 mW 532 nm倍频相干激光束）同时作用下，Au纳米颗粒（NP）A，B和C的光致二阶极化率。我们研究了三种类型的样品具有不规则的和不同的致密参数的Au NP沉积在ITO基板上。我们已经发现，最大的双色（1064 nm和532 nm）的受激光学二次谐波产生为10 ns的脉冲宽度观察具有不规则的Au NP沉积在ITO上的样品。研究了在1064 nm和1064 nm脉冲激光（脉冲功率密度为532 nm的10 ns脉冲激光）和532 nm连续倍频相干激光（300 mW倍频相干激光）同时作用下，Au NP的光致二阶极化率。我们发现，在连续波处理的15-20分钟期间，吸收最大值发生主要变化。这些最大值表明在308 nm、310 nm和345 nm光谱带附近出现了额外的吸收。后者是由于在ITO衬底和Au纳米颗粒之间的边界处出现了陷阱能级而引起的。(C)2010 Elsevier B. V.保留所有权利。
We have performed firstly studies of the photoinduced second order susceptibilities in the Au nanoparticles (NP) A, B and C under simultaneous influence of the bicolor 1064 nm and bicolor laser treatment (1064 nm 10 ns pulsed laser with pulse power densities 532 nm 10 ns laser treatment and the cw 300 mW 532 nm SHG coherent laser beams. We have studied three types of samples possessing irregular and different dense parameters of the Au NP deposited on the ITO substrate. We have found that the maximal bicolor (1064 nm and 532 nm) stimulated optical second harmonic generation for the 10 ns pulse duration was observed for the samples possessing irregular Au NP deposited on the ITO. We have performed studies of the photoinduced second order susceptibilities in the Au NP under simultaneous influence of the bicolor 1064 nm and bicolor laser treatment (1064 nm 10 ns pulsed laser with pulse power densities 532 nm 10 ns laser treatment and the cw 300 mW 532 nm SHG coherent laser beams). We have found that during the 15-20 min of the cw treatment there occur the principal changes in the absorption maxima. These maxima indicate on the occurrence of the additional absorption nearby the 308 nm and 310 nm and 345 nm spectral bands. The later are caused by the occurrence of the trapping levels in the border between the ITO substrate and the Au nanoparticles. (C) 2010 Elsevier B.V. All rights reserved.