Facile Synthesis of Tellurium Nanowires and Study of Their Third-Order Nonlinear Optical Properties
Facile Synthesis of Tellurium Nanowires and Study of Their Third-Order Nonlinear Optical Properties
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DOI：
10.5935/0103-5053.20160145
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发表时间：
2017-01-01
影响因子：
1.4
通讯作者：
Araújo, Cid B.
中科院分区：
文献类型：
--
作者：
Silva, Robson R.;Mejia, Hans A. G.;Araújo, Cid B.
本文报道了在温和的条件下，利用表面活性剂辅助合成法制备了不同形貌的碲单晶纳米线。采用次磷酸还原二氧化碲的方法，分别在聚氧乙烯（23）月桂基醚和十六烷基三甲基溴化铵的辅助下合成了短的和长的Te纳米线。我们得到了直径小于30 nm，长度从600 nm到5 μ m可调的均匀单晶Te纳米线。短和长Te纳米线显示出显著的非线性吸收，并利用Z扫描技术研究了它们的三阶非线性光学性质。首次观察到一维Te纳米结构中饱和吸收与反饱和吸收之间的显著转换行为。虽然短的和长的Te纳米线显示这样有趣的行为，短的表现出优越的上级光限幅性能。
We report on the synthesis of single-crystalline tellurium nanowires with different aspectratios prepared via facile surfactant-assisted synthesis under mild conditions. Short and long Te nanowires were synthesized by the reduction of tellurium dioxide by hypophosphorous acid with the assistance of polyoxyethylene (23) laurylether and cetyltrimethylammonium bromide, respectively. We obtained uniform single-crystal Te nanowires with diameter below 30 nm and tunable length from 600 nm to 5 mu m. Short and long Te nanowires showed remarkable nonlinear absorption and their third-order nonlinear optical properties were investigated by the Z-scan technique with single 80 ps laser pulses at 532 nm. For the first time, it was observed a distinguished switching behavior from saturated absorption to reverse saturated absorption as a function of the laser intensity in one-dimensional Te nanostructures. Although both short and long Te nanowires display such interesting behavior, the short ones exhibited superior optical limiting performance.