Multidomain acoustic wave devices
A multidomain plate acoustic wave device is provided having one or more single piezoelectric crystalline plates with differently polarized ferroelectric domains, where the domains have diverse directions of their axes of polarization. The device may consist of a multidomain plate acoustic wave transducer, a multidomain plate acoustic wave delay line, a multidomain plate acoustic wave rf filter, and any combination thereof. The differently polarized ferroelectric domains may comprise a collection of inversely or differently poled ferroelectric domains within a single piezoelectric medium. The medium may be any crystalline or ceramic plate with non-zero piezoelectric properties, in which the domains are created and embedded. In varying embodiments, the device includes electrodes oriented to generate an external rf field in various, respective directions, including in a direction normal to a basal plane of the device, or in a direction parallel to a length or a width of the device.
1. A multidomain plate acoustic wave device, said device comprising:
one or more single plate acoustic wave propagating piezoelectric plates with differently polarized ferroelectric domains, said domains having diverse directions of their axes of polarization.
2. The device of claim 1 , wherein said device is selected from the group consisting of a multidomain plate acoustic wave transducer, a multidomain plate acoustic wave delay line, a multidomain plate acoustic wave rf filter, and any combination thereof.
3. The device of claim 1 , wherein said differently polarized ferroelectric domains comprise a collection of inversely or differently poled ferroelectric domains within a single piezoelectric medium, said medium selected from the group consisting of any crystalline or ceramic plate with non-zero piezoelectric properties, in which said domains are created and embedded.
4. The device of claim 1 , wherein said ferroelectric polarized domains have different dimensions and spacing between them.
5. The device of claim 1 , wherein said ferroelectric domains are formed in an oblique crystallographic cut chips.
6. The device of claim 4 , wherein said ferroelectric domains are formed in an oblique crystallographic cut chips.
7. The device of claim 1 , wherein said ferroelectric domains having variable dimensions.
8. The device of claim 1 , wherein a plate acoustic wave is propagated within the piezoelectric plate when an external electric field is applied to the device.
9. The device of claim 2 , wherein a plate acoustic wave is propagated within the body of the piezoelectric plate when an external electric field is applied to the device.
10. The device of claim 1 , wherein one or more of ferroelectric domain dimensions, inter-domain distances between neighbor domains, and directions of domain polarizations are variable or changing from one ferroelectric domain to another.
11. The device of claim 1 , wherein said device can generate a plate acoustic wave in a band of kilohertz, megahertz, gigahertz, and terahertz frequency range.
12. The device of claim 1 , wherein said device can generate a plate acoustic wave that is a plate acoustic wave of ultra high frequencies, a chirp acoustic wave, an ultrasound of variable frequencies or in accordance to desirable rate of frequency change with time.
13. The device of claim 1 , wherein said multidomain device is fabricated in a piezoelectric media having dimensions in centimeter-millimeter, micro-, and nano- scale range of overall transducer dimension.
14. The device of claim 1 , wherein one or more multidomain plates form a multidomain plate acoustic wave delay line or a rf filter.
15. The device of claim 1 , further comprising electrodes oriented so as to apply an external rf electric field in a direction normal to a basal plane of the one or more single piezoelectric plates comprising the device.
16. The device of claim 1 , further comprising electrodes oriented so as to apply an external rf electric field in a direction parallel to a length of said device defined by the one or more single piezoelectric plates comprising the device.
17. The device of claim 1 , further comprising electrodes oriented so as to apply an external rf electric field in a direction parallel to a width of said device defined by the one or more single piezoelectric plates comprising the device.
18. The device of claim 1 , wherein the piezoelectric plates comprise piezoelectric crystalline plates.