光子学报, 2017, 46 (12): 1216002, 网络出版: 2017-11-23
还原石墨烯光学波段复折射率及消光性能研究
Complex Refractive Index and Extinction Performance of Reduced Graphene Oxide in Optical Bands
石墨烯 复折射率 消光效率因子 反射率 K-K关系 Graphene The complex refractive Extinction efficiency The refractive index K-K relation
摘要
在对氧化和还原石墨烯近紫外到近红外波段反射率谱测量的基础上, 利用Kramers-Kronig关系计算其复折射率, 并反推反射率与光谱分析确定误差水平; 运用T矩阵法计算其在该波段的吸收和消光效率因子, 分析其消光和吸收性能.结果表明, 反推反射率值与实测值误差在10-6量级, 且其吸收谱线特征与复折射率虚部吻合; 还原石墨烯的可见光-近红外消光和吸收较强, 但紫外消光和吸收较弱; 氧化石墨烯在紫外-可见光波段的消光和吸收较强, 但在近红外波段迅速减弱.因此, 该计算方法在两种材料上适用, 且氧化和还原石墨烯均可用作宽波段的光吸收或消光材料, 但还原石墨烯近紫外波段以及氧化石墨烯近红外波段的性能有待改善.
Abstract
The spectral reflectance of reduced graphene oxide and graphene oxide from near UV to near infrared was tested, and its complex refractive index was calculated by Kramers-Kronig relation. Then the relative errors were analyzed by inversely deducing reflectance and spectral analysis. Finally, absorption and extinction efficiency were calculated by T-matrix method in order to analyzing its extinction and absorption properties. The results show that the error between inversely deduced reflectance and the measured one are at 10-6, and its spectral absorption characteristics are coincided with the image part of complex refractive index. The absorption and extinction ability of reduced graphene oxide is strong in visible and NIR, but weak in UV. The absorption and extinction ability of graphene oxide is strong in UV and visible, but weaker rapidly in NIR. Therefore, reduced graphene oxide and graphene oxide both can be used as wide-band photoelectric absorption or extinction material, but the performance of reduced graphene oxide in near UV and graphene oxide in NIR need to be improved.
马德跃, 李晓霞, 郭宇翔, 曾宇润. 还原石墨烯光学波段复折射率及消光性能研究[J]. 光子学报, 2017, 46(12): 1216002. MA De-yue, LI Xiao-xia, GUO Yu-xiang, ZENG Yu-run. Complex Refractive Index and Extinction Performance of Reduced Graphene Oxide in Optical Bands[J]. ACTA PHOTONICA SINICA, 2017, 46(12): 1216002.