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Refractive index modulating Raman spectroscopy based on perovskite PMN-PT ceramics

机译:基于钙钛矿PMN-PT陶瓷的折射率调制拉曼光谱

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摘要

A three-layer planar waveguide structure comprising a perovskite (1-x)Pb(Mg1/3Nb2/3Nb2/3)O3-xPbTiO3 (PMN-PT) ceramic sandwiched by two silver films is designed and called PMPW. Using the high sensitivity of ultrahigh-order modes, theoretical analysis is performed to calculate the effective refractive index (ERI) of the PMPW. A detailed analysis of the Raman spectrum of PMN-PT at 795 cm(-1) is performed. A comparison of the numerical analysis and experimental results reveals that the nonlinear change in ERI plays a primary role in the Raman signal variation. Analysis of the Raman spectrum of a sample deposited on PMPW confirms that it is effective for modulating Raman signals. (C) 2016 Optical Society of America
机译:设计了一种三层平面波导结构,该结构包括钙钛矿(1-x)Pb(Mg1 / 3Nb2 / 3Nb2 / 3)O3-xPbTiO3(PMN-PT)陶瓷,中间夹有两个银膜,称为PMPW。使用超高阶模式的高灵敏度,进行了理论分析,以计算PMPW的有效折射率(ERI)。对795 cm(-1)处的PMN-PT拉曼光谱进行了详细分析。数值分析和实验结果的比较表明,ERI的非线性变化在拉曼信号变化中起主要作用。对沉积在PMPW上的样品的拉曼光谱的分析证实,它对调制拉曼信号有效。 (C)2016美国眼镜学会

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