Light-emitting device including polarized light control member
A light-emitting device includes at least one light-emitting element including a semiconductor layered portion and configured to emit light that has a predetermined wavelength and includes a first polarization component and a second polarization component; and at least one polarized light control member in contact with the at least one light-emitting element. The at least one polarized light control member includes a first structure and a second structure that are positioned in order from the at least one light-emitting element side. The first structure receives the light having the predetermined wavelength to generate near-field light. The second structure receives the near-field light and the light having the predetermined wavelength to emit light in which a proportion of the second polarization component is greater than a proportion of the first polarization component.
1. A light-emitting device comprising:
at least one light-emitting element comprising a semiconductor layered portion and configured to emit light that has a predetermined wavelength and includes a first polarization component and a second polarization component; and
at least one polarized light control member in contact with the at least one light-emitting element; wherein:
the at least one polarized light control member comprises a first structure and a second structure positioned in order from a light-emitting element side;
in the first structure and the second structure, a length in a height direction perpendicular to a light-emitting surface of the light-emitting element, a length in a vertical direction perpendicular to the height direction, and a length in a horizontal direction perpendicular to both of the height direction and the vertical direction are less than a length of the predetermined wavelength;
a distance between the first structure and the second structure is less than the length of the predetermined wavelength;
a ratio of a length of the second structure in the horizontal direction to a length of the second structure in the vertical direction is greater than 1; and
the predetermined wavelength is in a range from a wavelength on a short side to a wavelength on a long side of a wavelength having an intensity that is half an intensity of a peak wavelength of light emitted from the at least one light-emitting element.
2. The light-emitting device according to any one of claim 1 , wherein:
the at least one polarized light control member comprises a dielectric layer covering the first structure; and
the second structure is on the dielectric layer.
3. The light-emitting device according to claim 2 , wherein:
the at least one light-emitting element comprises a substrate;
the substrate is located between the semiconductor layered portion and the polarized light control member; and
a refractive index of the substrate is higher than a refractive index of the semiconductor layered portion and is lower than a refractive index of the dielectric layer.
4. The light-emitting device according to claim 1 , wherein:
in a top plan view, portions of the first structure overlap portions of the second structure.
5. The light-emitting device according to claim 1 , wherein:
the first structure and the second structure are formed of a metal.
6. A display comprising:
the light-emitting device according to any one of claim 1 ; and
a liquid crystal panel.
7. The light-emitting device according to claim 1 , wherein:
a difference between the wavelength on the long side and the wavelength on the short side is 10 nm or greater and 50 nm or less.
8. The light-emitting device according to claim 2 , wherein:
a difference between the wavelength on the long side and the wavelength on the short side is 10 nm or greater and 50 nm or less.
9. A light-emitting device comprising:
at least one light-emitting element comprising a semiconductor layered portion and configured to emit light that has a predetermined wavelength and includes a first polarization component and a second polarization component; and
at least one polarized light control member in contact with the at least one light-emitting element; wherein:
the at least one polarized light control member comprises a first structure and a second structure positioned in order from a light-emitting element side;
in the first structure and the second structure, a length in a height direction perpendicular to a light-emitting surface of the light-emitting element, a length in a vertical direction perpendicular to the height direction, and a length in a horizontal direction perpendicular to both of the height direction and the vertical direction are less than a length of the predetermined wavelength;
a distance between the first structure and the second structure is less than the length of the predetermined wavelength;
a ratio of a length of the second structure in the horizontal direction to a length of the second structure in the vertical direction is greater than 1;
the at least one polarized light control member comprises a dielectric layer covering the first structure; and
the second structure is on the dielectric layer.
10. The light-emitting device according to claim 9 , wherein:
the at least one light-emitting element comprises a substrate;
the substrate is located between the semiconductor layered portion and the polarized light control member; and
a refractive index of the substrate is higher than a refractive index of the semiconductor layered portion and is lower than a refractive index of the dielectric layer.
11. The light-emitting device according to claim 9 , wherein:
in a top plan view, portions of the first structure overlap portions of the second structure.
12. The light-emitting device according to claim 9 , wherein:
the first structure and the second structure are formed of a metal.
13. A display comprising:
the light-emitting device according to any one of claim 9 ; and
a liquid crystal panel.