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US 11,152,765 B1Granted
Strained and strain control regions in optical devices
AssigneeKYOCERA SLD Laser, Inc.
InventorsJames W. Raring, Christiane Poblenz Elsass
Life of this patent
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Abstract
An optical device has a gallium and nitrogen containing substrate including a surface region and a strain control region, the strain control region being configured to maintain a quantum well region within a predetermined strain state. The device also has a plurality of quantum well regions overlying the strain control region.
Claims20
An optical device comprising:
- a gallium and nitrogen containing substrate having a surface region and a first in-plane lattice constant;
- a single or plurality of strained regions acting as an optical confinement region overlying the surface region, the strained regions having a second in-plane lattice constant, the second in-plane lattice constant being smaller than a native in-plane lattice constant of the strained regions;
- a strain control region disposed between or above one or more of the strained regions having a third in-plane lattice constant, the third in-plane lattice constant maintaining at least a quantum well region within a predetermined strain state;
- a plurality of quantum well regions overlying the strained regions, each of the plurality of quantum well regions having a fourth in-plane lattice constant, the fourth in-plane lattice constant being different than the first in-plane lattice constant, wherein the strain control region has a higher bandgap than the strained regions and the plurality of quantum well regions.
1 more element
An optical module apparatus comprising:
- a laser diode device, the laser diode device comprising:
- a gallium and nitrogen containing substrate having a surface region and a first in-plane lattice constant;
- a single or plurality of strained regions acting as an optical confinement region overlying the surface region, the strained regions having a second in-plane lattice constant, the second in-plane lattice constant being smaller than a native in-plane lattice constant of the strained regions;
- a strain control region disposed between or above one or more of the strained regions having a third in-plane lattice constant, the third in-plane lattice constant maintaining at least a quantum well region within a predetermined strain state;
- a plurality of quantum well regions overlying the strained regions, each of the plurality of quantum well regions having a fourth in-plane lattice constant, the fourth in-plane lattice constant being different than the first in-plane lattice constant, wherein the strain control region has a higher bandgap than the strained regions and the plurality of quantum well regions.
2 more elements
A system comprising:
- a lighting apparatus, and
- a laser diode device configured to provide light for the lighting apparatus, the laser diode device comprising:
- a gallium and nitrogen containing substrate having a surface region and a first in-plane lattice constant;
- one or more strained regions overlying the surface region of the gallium and nitrogen containing substrate, each of the one or more strained regions having a second in-plane lattice constant, the second in-plane lattice constant being smaller than a native in-plane lattice constant of the one or more strained regions;
- at least one strain control region overlying at least one of the one or more strained regions, the at least one strain control region having a third in-plane lattice constant, the third in-plane lattice constant maintaining at least a quantum well region within a predetermined strain state;
- a plurality of quantum well regions overlying the at least one strain control region, each of the plurality of quantum well regions having a fourth in-plane lattice constant, the fourth in-plane lattice constant being different than the first in-plane lattice constant, wherein the strain control region has a higher bandgap than the one or more strained regions and the plurality of quantum well regions.
3 more elements
Dependencies are inferred from the claim text.