Varying Permittivity: Low-Freq. Electro-Optic Modulation Explained

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Low-frequency electro-optic modulation can generate variations in permittivity, primarily through changes in material density in acousto-optic devices. The discussion seeks clarity on how this modulation specifically alters permittivity and whether it can be controlled to increase linearly or exponentially. Participants express interest in the technical challenges of creating such modulation and the influence of external electromagnetic fields on the process. A request for links to specific devices or further resources is made to enhance understanding. Overall, the conversation centers on the mechanisms and control of permittivity changes in electro-optic applications.
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I read from a paper that we can generate the permittivity variation by low-frequency electro-optic modulation.
So, does anyone know, how this modulation changes the permittvity? or a link will be appreciated!
 
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In acousto-optic devices, the permittivity changes due to changes in the density. Do you have a link to a specific device?
 
Andy Resnick said:
In acousto-optic devices, the permittivity changes due to changes in the density. Do you have a link to a specific device?

No, I just want to know whether it is technically difficult to make it, for instance, to increase linearly or exponentially.
How to control it? is it due to the influence of external electromagnetic field or something else?
 
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