Experimental Observation of Thermo-optic Nonlinearity with a Long-range Surface Wave Supported by a Very Thin Palladium Film
Experimental Observation of Thermo-optic Nonlinearity with a Long-range Surface Wave Supported by a Very Thin Palladium Film
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极薄钯膜支持的长程表面波热光非线性的实验观察
DOI：
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
J. Sambles
中科院分区：
文献类型：
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作者：
Fuzi Yang;J. Sambles
摘要 采用衰减全反射技术，用514·5 nm 辐射研究了由薄钯膜支撑的长程表面激子极化子。使用角度扫描和辐射强度扫描在几个固定的入射角下观察热光非线性。观察到强烈的非线性效应，这只能通过薄耦合间隙的光热位移和填充间隙的流体中热引起的折射率变化的组合来解释。获得的所有数据都通过包含这两种效应的模型进行了充分拟合。
Abstract Using the attenuated total refiection technique a long-range surface exciton-polariton supported by a thin palladium film has been studied with 514·5 nm radiation. Thermo-optic nonlinearity is observed using both angle-scanning and radiation intensity-scanning at several fixed angles of incidence. Strong nonlinear effects are observed which may only be interpreted through a combination of photo-thermal displacement of the thin coupling gap and thermally induced index changes in the fluid that fills the gap. All the data obtained are adequately fitted by a model that incorporates both these effects.