Ferroelectric photomechanical actuators

Details Ferroelectric photomechanical actuators Ferroelectric photomechanical actuators

1984-05-07

1985-06-18

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310330, 310332, 310358, 310366, 310328, H01L 4108

Patent

active

045242941

ABSTRACT:
A method for deforming materials which are ferroelectric, have remanent polarization, and which exhibit a length-dependent photoelectric effect. One type of material is photovoltaic, piezoelectric, ferroelectric ceramics. Illuminating such materials causes them to deform, either in length or in thickness, depending on the direction of the remanent polarization. A single plate of such material may be used, or a pair of plates bonded together may be used.

REFERENCES:
patent: 3585416 (1971-06-01), Mellen
patent: 4252440 (1981-02-01), Frosch et al.
Ferroelectric-Photoconductor Device, by A. F. Mayadas, IBM Technical Discure Bulletin, vol. 13, No. 10, Mar. 1971.
Photomechanical Effect in Noncentrosymmetric Semiconductors-CdS, by Lagowski et al., Applied Physics Letters, vol. 20, No. 1, Jan. 1, 1972.
Optomechanical Bimorph Actuator, by Brody, Ferroelectrics 1983, vol. 50, pp. 27-32.
Optical Harmonic Generation in Two Ferroelectric Crystals, by Smith, Applied Optics, vol. 3, No. 1, Jan. 1964.

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