Phononic crystal wave structures
First Claim
1. A micro/nano-mechanical acoustical device, the device comprising:
- a phononic crystal slab configured as an micro/nano-acoustical wave medium, the phononic crystal slab defining an exterior surface that bounds an interior volume, the phononic crystal slab sized and shape to contain acoustical waves within the interior volume of the phononic crystal slab;
wherein a portion of the phononic crystal slab comprises a periodic array of empty inclusions creating a phononic band gap.
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Abstract
Phononic crystal wave structures and methods of making same are discussed in this application. According to some embodiments, an acoustic structure can generally comprise a phononic crystal slab configured as a micro/nano-acoustic wave medium. The phononic crystal slab can define an exterior surface that bounds an interior volume, and the phononic crystal slab can be sized and shaped to contain acoustic waves within the interior volume of the phononic crystal slab. The phononic crystal slab can comprise at least one defect portion. The defect portion can affect periodicity characteristics of the phononic crystal slab. The defect portion can be shaped and arranged to enable confinement and manipulation of acoustic waves through the defect portion(s) of phononic crystal slab. Other aspects, features, and embodiments are also claimed and described.
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Citations
31 Claims
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1. A micro/nano-mechanical acoustical device, the device comprising:
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a phononic crystal slab configured as an micro/nano-acoustical wave medium, the phononic crystal slab defining an exterior surface that bounds an interior volume, the phononic crystal slab sized and shape to contain acoustical waves within the interior volume of the phononic crystal slab; wherein a portion of the phononic crystal slab comprises a periodic array of empty inclusions creating a phononic band gap. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. In a communications device capable of receiving data from and transmitting data to another communications device, the communications device comprising an acoustical wave system enabling acoustical waves to pass through the system via a micro/nano-mechanical acoustical device, the acoustical wave system comprising:
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a phononic crystal acoustic wave medium disposed between an input transducer and an output transducer, the acoustical wave medium enabled to allow acoustic waves to propagate between the transducers, the input transducer configured to excite the acoustic wave medium and the output transducer configured to receive acoustical wave excitation energy; the acoustic wave medium comprising a plurality of phononic crystal plate sections each containing a multi-dimensional periodic array of empty inclusions creating a phononic band gap, the periodic array of inclusions being disposed so that only acoustic waves of predetermined frequency or range of frequencies to propagate through the acoustic wave medium; the acoustic wave medium being sized and shaped to contain acoustical waves within the interior volume space of the acoustic wave medium; and the acoustic wave medium comprising at least one defect region disposed among the periodic array of empty inclusions, the defect region capable of allowing acoustic waves to propagate through the defect region. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A micro/nano-mechanical acoustical device, the device comprising:
a slab plate sized and shaped to confine acoustical waves within the interior volume of the slab plate;
the slab plate comprising a phononic crystal region and a non-periodic region, the phononic crystal region comprising a periodic array of empty inclusions creating a phononic band gap and proximately situated to the non-periodic region and configured to bound acoustical waves in the non-periodic region, and the non-periodic region configured to allow the acoustic waves to propagate therethrough.- View Dependent Claims (26, 27, 28, 29, 30, 31)
Specification