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Optical beam shift is related to external conditions. Here, optical spot position and the polarization properties of the totally polarized, P-polarized, and S-polarized laser beams reflected from an aluminum film as a function of the external direct current (DC) voltage are measured by a Slit Beam Profiler and a polarimeter. The results show that the optical beam shift of the totally polarized laser beam and the Spolarized laser beam jumps from 500 to 590 mm, and À10 to 70 mm, respectively, at different critical pressures, when the external DC value changes from 0 to 2.5 V, while the optical beam shift of the P-polarized laser beam is small and has no jump. The degree of linear polarization of different polarized laser beams cannot change, while the degree of circular polarization of different polarized laser beams changes as a function of the external DC voltage value.

Garnet film is widely used as a key element of optical sensors due to its Faraday effect. The polarization plane of the transmitted, linearly polarized light can be rotated when the garnet interacts with an external magnetic field. Here, an optical spot and the polarization state of a laser beam reflected from a garnet‐graphite interface as a function of the external direct current (DC) voltage are measured by a Slit Beam Profiler and a Polarization Analyzing System. The results show that the garnet‐graphite stress can be generated as a function of an external DC voltage, that the linearly polarized laser beam can be split into two optical spots, and that the maximum distance is 0.68 mm, while the polarization properties of the laser beam remained unchanged.

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