US 12,362,540 B2Granted

Light emitting element

AssigneeSony Corporation

InventorsTatsushi Hamaguchi, Jugo Mitomo, Hiroshi Nakajima, Masamichi Ito, Susumu Sato

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Abstract

A light emitting element according to the present disclosure includes a first light reflecting layer 41, a laminated structure 20, and a second light reflecting layer 42 laminated to each other. The laminated structure 20 includes a first compound semiconductor layer 21, a light emitting layer 23, and a second compound semiconductor layer 22 laminated to each other from a side of the first light reflecting layer. Light from the laminated structure 20 is emitted to an outside via the first light reflecting layer 41 or the second light reflecting layer 42. The first light reflecting layer 41 has a structure in which at least two types of thin films 41A and 41B are alternately laminated to each other in plural numbers. A film thickness modulating layer 80 is provided between the laminated structure 20 and the first light reflecting layer 41.

Claims20

Dependent claims

A light emitting element including a first light reflecting layer, a laminated structure, and a second light reflecting layer laminated to each other, wherein

the laminated structure includes a first compound semiconductor layer, a light emitting layer, and a second compound semiconductor layer laminated to each other from a side of the first light reflecting layer,
light from the laminated structure is emitted to an outside via the first light reflecting layer or the second light reflecting layer,
the first light reflecting layer has a structure in which at least two types of thin films are alternately laminated to each other in plural numbers,
a film thickness modulating layer is provided between the laminated structure and the first light reflecting layer, and
the first light reflecting layer and the film thickness modulating layer have a concave mirror part in a shape of a circle or a parabola,
wherein 1×10−5 m≤RDBR≤1×10−4 m where RDBR is a curvature radius of the concave mirror part in an effective region of the concave mirror part, and
wherein RDBR>r′DBR where r′DBR is a radius of the effective region of the concave mirror part.

4 more elements

A light emitting element including a first light reflecting layer, a laminated structure, and a second light reflecting layer laminated to each other, wherein

the laminated structure includes a first compound semiconductor layer, a light emitting layer, and a second compound semiconductor layer laminated to each other from a side of the first light reflecting layer,
light from the laminated structure is emitted to an outside via the first light reflecting layer or the second light reflecting layer,
the first light reflecting layer has a structure in which at least two types of thin films are alternately laminated to each other in plural numbers,
a film thickness modulating layer is provided between the laminated structure and the first light reflecting layer,
the first light reflecting layer and the film thickness modulating layer have a concave mirror part,
at least two light absorbing material layers are formed inside the laminated structure in parallel with a virtual plane occupied by the light emitting layer, and
0
.
9
×
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m
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q
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≤
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A
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≤
1
.
1
×
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m
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is satisfied when an oscillating wavelength is λ0, an entire equivalent refractive index of two light absorbing material layers and a portion of the laminated structure positioned between the two light absorbing material layers is neq, and a distance between the two light absorbing material layers is LAbs, and m is an integer of one or more.

54 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/671,499Filed 22 May 2024 · continuation
Priority: JP 2016-24665420 Dec 2016
Published: US 2024/0332903 A13 Oct 2024
Granted: 15 Jul 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification17 codes

H01S 5/18327
Position of the structure: structure being part of a DBR
H01S 5/0207
Substrates, e.g. growth, shape, material, removal or bonding: substrates having a special shape
H01S 5/18341
Having only vertical cavities, e.g. vertical cavity surface-emitting lasers [VCSEL]: intra-cavity contacts
H01S 5/18361
Having only vertical cavities, e.g. vertical cavity surface-emitting lasers [VCSEL]: structure of the reflectors, e.g. hybrid mirrors

Family

PCT/JP2017/037234Parent of this continuation · filed 13 Oct 2017
Application18/111,686Parent of this continuation · filed 20 Feb 2023
US 11,611,196 B2Parent of this continuation · filed 21 Mar 2023
US 2024/0332903 A1Pre-grant publication · published 3 Oct 2024
US 12,034,274 B2Parent of this continuation
Application16/471,428Parent of this continuation
US 2021/0135428 A1Published application
US 2023/0208106 A1Published application
US 12,362,540 B2This patent

From the US filing history. Foreign family members aren’t listed.