Phononic structures and related devices and methods
First Claim
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1. A phononic structure, comprising:
- a sheet of a first material, the sheet comprising a plurality of regions, wherein adjacent regions have dissimilar phononic patterns and are configured to carry a heat flow along the longitudinal axis of the phononic structure,wherein;
each region has a length perpendicularly to the longitudinal axis of the phononic structure, the length being more than twice a phonon mean free path of the first material, andthe plurality of regions comprises at least a first region and a second region adjacent the first region, the first region comprising a period pattern of holes in the first material and the second region comprising the first material devoid of holes.
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Abstract
Phononic structures, devices related to phononic structures, and methods related to fabrication of the phononic structures are described. The phononic structure can include a sheet of material, where the sheet of material can include a plurality of regions. Adjacent regions in the sheet of material can have dissimilar phononic patterns.
109 Citations
11 Claims
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1. A phononic structure, comprising:
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a sheet of a first material, the sheet comprising a plurality of regions, wherein adjacent regions have dissimilar phononic patterns and are configured to carry a heat flow along the longitudinal axis of the phononic structure, wherein; each region has a length perpendicularly to the longitudinal axis of the phononic structure, the length being more than twice a phonon mean free path of the first material, and the plurality of regions comprises at least a first region and a second region adjacent the first region, the first region comprising a period pattern of holes in the first material and the second region comprising the first material devoid of holes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 9, 10)
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8. A phononic structure comprising:
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a sheet of a first material, the sheet comprising a plurality of regions, wherein adjacent regions have dissimilar phononic patterns and are configured to carry a heat flow along a longitudinal axis of the phononic structure, and each region has a length perpendicularly to the longitudinal axis of the phononic structure, the length being more than twice a phonon mean free path of the first material, wherein; the plurality of regions comprises a first set of regions and a second set of regions, the first set of regions comprising a periodic pattern of holes in the first material, regions in the first set of regions have a first phononic pattern, regions in the second set of regions have a second phononic pattern dissimilar to the first phononic pattern, the phononic structure alternates, along the longitudinal axis of the phononic structure, between a region from the first set of regions and a region from the second set of regions, and the first set of regions comprises at least three regions and the second set of regions comprises at least three regions.
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11. A thermoelectric device, comprising:
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at least a first sheet and a second sheet of a semiconductor material, each of the first sheet and the second sheet comprising a first region and a second region adjacent the first region, wherein the first region and the second region have dissimilar phononic patterns and are configured to carry a heat flow along a longitudinal axis of the thermoelectric device; a first electrode electrically coupled to a first side of the first sheet; a second electrode electrically coupled to a first side of the second sheet; and a third electrode electrically coupled to a second side of the first sheet and the second sheet, wherein; both the first and second regions have a length perpendicularly to the longitudinal axis of the thermoelectric device, the length being more than twice a phonon mean free path of the semiconductor material, the first region comprises a period pattern of holes and the second region is devoid of holes, and during operation of the thermoelectric device, the first and second sides of each sheet are adapted to exhibit different temperatures.
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Specification