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US 2019/0058107 A1Published application
Thermo-optical method of phrase transformational transduction
AssigneeThe Government of the United States of America, as represented by the Secretary of the Navy
InventorsPeter Finkel, Margo Staruch, Fletcher Blackmon, Lynn Antonelli
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Abstract
Described herein is the use of large phase transformational strain in relaxor ferroelectric single crystals for broadband sound generation. The technique exploits the thermo-optical triggering and thus an opto-acoustic effect of ferroelectric phase transformation piezocrystals under mechanical bias conditions.
Claims6
A method of acoustic transduction comprising:
- providing a [011] poled crystal of Pb(In1/2Nb1/2)O3—Pb(Mg1/3Nb2/3)O3—PbTiO3 (PIN-PMN-PT) subject to a compressive mechanical pre-loading stress and operably connected to a diaphragm;
- and
- heating the PIN-PMN-PT crystal with a laser thereby causing a phase transition in the PIN-PMN-PT crystal and emission of an acoustic signal from the diaphragm.
An acoustic transducer comprising:
- a [011] poled crystal of Pb(In1/2Nb1/2)O3—Pb(Mg1/3Nb2/3)O3—PbTiO3 (PIN-PMN-PT) contained in a mount that subjects the PIN-PMN-PT crystal to a compressive mechanical pre-loading stress;
- a diaphragm operably connected to the PIN-PMN-PT crystal;
- and
- a source of laser light configured to optically heat the PIN-PMN-PT crystal sufficient to cause a phase transition in the PIN-PMN-PT crystal and emission of an acoustic signal from the diaphragm.
1 more element
Dependencies are inferred from the claim text.