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Maxwell-Wagner effect and second harmonic generation in gradient structures
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DOI：10.1111/jace.19848.png)
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摘要
En 中文
For the first time, we have registered, studied, and modeled the Maxwell-Wagner effect in structures with a smooth gradient of charge carriers' mobility. The Maxwell-Wagner charge, formed after applying a DC voltage to the gradient structure at room temperature, is distributed over the entire region of the gradient. The experiments were performed with slides of a soda-lime glass subjected to sodium-to-potassium ion exchange, where the ions concentration gradient provides gradient of conductivity while dielectric permittivity stays the same. The electric field generated by the Maxwell-Wagner charge is concentrated in potassium-enriched less conductive regions of the slide and is sufficiently high to induce the second order optical nonlinearity in the initially isotropic glass. The effect causes over 100-fold increase in a second harmonic signal relative to the signal from the surface of a virgin glass. This phenomenon in graded-concentration structures is perspective for characterizing interfacial charges, geometry of the gradient regions, and spatial distribution of electrical conductivity in micro- and optoelectronic semiconductor structures.
Keyword:
current
diffusion/diffusivity
electrical properties
materials/properties
optical
soda-lime-silica
期刊
IF:
3.8
论文数:
1.7W
被引数:
5.4W
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