Acousto-optic device having wide diffraction angle, optical scanner, light modulator, and display apparatus using the acousto-optic device
First Claim
1. An acousto-optic device, comprising:
- a core layer having a periodic photonic crystal structure in which unit cells of predetermined patterns are repeated;
a first clad layer on a first surface of the core layer, the first clad layer having a refractive index that is different from a refractive index of the core layer;
a second clad layer on a second surface of the core layer, the second surface being opposite the first surface, the second clad layer having a refractive index that is different from the refractive index of the core layer; and
a sound wave generator configured to directly apply surface acoustic waves (SAW) to the core layer, the first clad layer, the second clad layer, or any combination thereof,wherein the core layer, the first clad layer, the second clad layer, or any combination thereof to which the SAW are applied includes an acousto-optic material.
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Accused Products
Abstract
An acousto-optic device having a wide range of diffraction angle and an optical scanner, a light modulator, and a display apparatus using the acousto-optic device are provided. The acousto-optic device includes a core layer having a periodic photonic crystal structure in which unit cells of predetermined patterns are repeated, a first clad layer on a first surface of the core layer, the first clad layer having a refractive index that is different from a refractive index of the core layer, a second clad layer on a second surface of the core layer, the second surface being opposite the first surface, the second clad layer having a refractive index that is different from the refractive index of the core layer, and a sound wave generator configured to apply surface acoustic waves (SAW) to the core layer, the first clad layer, the second clad layer, or any combination thereof.
15 Citations
26 Claims
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1. An acousto-optic device, comprising:
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a core layer having a periodic photonic crystal structure in which unit cells of predetermined patterns are repeated; a first clad layer on a first surface of the core layer, the first clad layer having a refractive index that is different from a refractive index of the core layer; a second clad layer on a second surface of the core layer, the second surface being opposite the first surface, the second clad layer having a refractive index that is different from the refractive index of the core layer; and a sound wave generator configured to directly apply surface acoustic waves (SAW) to the core layer, the first clad layer, the second clad layer, or any combination thereof, wherein the core layer, the first clad layer, the second clad layer, or any combination thereof to which the SAW are applied includes an acousto-optic material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An optical scanner, comprising:
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a first acousto-optic device configured to diffract and/or deflect light in a first direction; a second acousto-optic device configured to diffract and/or deflect light in a second direction that is perpendicular to the first direction; and a light-coupling device configured to make light incident to the first acousto-optic device, wherein each of the first and second acousto-optic devices comprises a core layer having a periodic photonic crystal structure in which unit cells of predetermined patterns are repeated, a first clad layer on a first surface of the core layer, the first clad layer having a refractive index that is different from a refractive index of the core layer, a second clad layer on a second surface of the core layer, the second surface being opposite the first surface, the second clad layer having a refractive index that is different from the refractive index of the core layer, and a sound wave generator configured to apply surface acoustic waves (SAW) to the core layer, the first clad layer, the second clad layer, or any combination thereof, and wherein the core layer, the first clad layer, the second clad layer, or any combination thereof to which the SAW are applied includes an acousto-optic material. - View Dependent Claims (16, 17)
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18. A two-dimensional (2D)/three-dimensional (3D) switchable image display apparatus, comprising:
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a display panel; and an acousto-optic device array on a front surface of the display panel, the acousto-optic device array being configured to diffract and/or deflect images displayed on the display panel, the acousto-optic device array comprising acousto-optic devices, each of the acousto-optic devices comprising a core layer having a periodic photonic crystal structure in which unit cells of predetermined patterns are repeated, a first clad layer on a first surface of the core layer, the first clad layer having a refractive index that is different from a refractive index of the core layer, a second clad layer on a second surface of the core layer, the second surface being opposite the first surface, the second clad layer having a refractive index that is different from the refractive index of the core layer, and a sound wave generator configured to apply surface acoustic waves (SAW) to the core layer, the first clad layer, the second clad layer, or any combination thereof, wherein the core layer, the first clad layer, the second clad layer, or any combination thereof to which the SAW are applied includes an acousto-optic material. - View Dependent Claims (19, 20, 21)
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22. A holographic display apparatus, comprising:
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a light source configured to provide light; an acousto-optic device array comprising a plurality of acousto-optic devices, each of the acousto-optic devices being configured to diffract and/or deflect the light provided from the light source, each of the acousto-optic devices comprising a core layer having a periodic photonic crystal structure in which unit cells of predetermined patterns are repeated, a first clad layer on a first surface of the core layer, the first clad layer having a refractive index that is different from a refractive index of the core layer, a second clad layer on a second surface of the core layer, the second surface being opposite the first surface, the second clad layer having a refractive index that is different from the refractive index of the core layer, and a sound wave generator configured to apply surface acoustic waves (SAW) to the core layer, the first clad layer, the second clad layer, or any combination thereof; and a projection optical system configured to project the light diffracted by the acousto-optic device array, wherein the core layer, the first clad layer, the second clad layer, or any combination thereof to which the SAW are applied includes an acousto-optic material. - View Dependent Claims (23, 24)
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25. An acousto-optic device, comprising:
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a core layer including an acousto-optic material, the core layer having a periodic photonic crystal structure in which unit cells of predetermined patterns are repeated, the core layer being configured to generate a region at certain frequencies and wave vectors of lights around a photonic bandgap in which an angular distribution of a refractive index becomes flat; and a sound wave generator configured to provide surface acoustic waves (SAW) along the flat region of the angular distribution of the refractive index in the core layer, wherein incident light proceeding toward a vertex of the angular distribution of the refractive index is diffracted along the flat region of refractive index distribution toward an adjacent vertex. - View Dependent Claims (26)
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Specification