Giant optical limiting effect in Ormosil gel glasses doped with graphene oxide materials
Giant optical limiting effect in Ormosil gel glasses doped with graphene oxide materials
复制标题
掺杂氧化石墨烯材料的 Ormosil 凝胶玻璃中巨大的光限幅效应
DOI：
10.1039/c3tc31314j
复制
发表时间：
2013-01-01
影响因子：
6.4
通讯作者：
Zhan, Hongbing
中科院分区：
文献类型：
--
作者：
Zheng, Xiaoqing;Feng, Miao;Zhan, Hongbing
石墨烯材料由于其优异的线性和非线性光学（NLO）特性而在光限幅领域引起了人们的兴趣。然而，溶解性差和团聚限制了这些材料的实际应用。在此，合成了亲水性氧化石墨烯材料，包括氧化石墨烯纳米片（GONS）和氧化石墨烯纳米带（GONR）。使用一个简单的溶胶-凝胶过程中，GONSs和GONRs引入到甲基三乙氧基硅烷改性的硅酸盐（Ormosil）玻璃基质。使用纳秒Z扫描技术在532 nm处研究了NLO和光限幅（OL）特性。显示了Ormosil混合玻璃的大OL效应，其光学限幅阈值（F-th =类似于0.03 J cm（-2））超过相应悬浮液的光学限幅阈值5-20倍。我们推断，这种行为主要归因于非线性散射和非线性吸收的组合机制。混合玻璃是免费的损坏后，数百个连续的激光射击与800 μ J的能量。这些结果表明，掺杂氧化石墨烯材料的Ormosil混合玻璃可能是有前途的候选人的光学限幅器。
Graphene materials have attracted interest in the field of optical limiting because of their outstanding linear and nonlinear optical (NLO) properties. However, poor solubility and agglomeration have limited the practical applications of these materials. Here, hydrophilic graphene oxide materials, including graphene oxide nanosheets (GONSs) and graphene oxide nanoribbons (GONRs) are synthesized. Using a facile sol-gel process, GONSs and GONRs are introduced into a methyltriethoxysilane modified silicate (Ormosil) glass matrix. NLO and optical limiting (OL) properties are investigated using a nanosecond Z-scan technique at 532 nm. Large OL effects of Ormosil hybrid glasses are revealed, whose optical limiting thresholds (F-th = similar to 0.03 J cm(-2)) surpass those of corresponding suspensions by a factor of 5-20. We deduce that this behavior is mostly attributed to the combined mechanisms of nonlinear scattering and nonlinear absorption. The hybrid glasses are free of damage after hundreds of continuous laser shots with an energy of 800 mu J. These results indicate that Ormosil hybrid glasses doped with graphene oxide materials could be promising candidates for optical limiters.