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Sony patents laser design that mixes materials to prevent structural flaws

Sony describes a surface-emitting laser that uses a specific substrate material with a lattice constant between gallium arsenide and aluminum arsenide. The design stacks different material systems in the reflector and active layer to create a resonator that maintains desired performance while reducing the chance of structural defects.

Why it mattersThis filing focuses on improving the physical stability of laser components, which is a routine but important step in manufacturing reliable hardware for sensors or displays.

In the filing’s own words

Provided is a surface emitting laser capable of obtaining desired characteristics while suppressing occurrence of structural defects. A surface emitting laser according to the present technology includes a resonator including: a first structure including a substrate and a first reflector stacked on each other; a second structure that includes a second reflector and is disposed on a side of the first structure corresponding to the first reflector; and an intermediate structure that includes an active layer and is disposed between the first and second structures, in which the substrate includes a material having a lattice constant that is greater than a lattice constant of GaAs and less than a lattice constant of AlAs, and the first reflector and the intermediate structure include different material systems. According to the present technology, it is possible to provide a surface emitting laser capable of obtaining desired characteristics while suppressing occurrence of structural defects.

What exactly they claim (claim 1)

1. A surface emitting laser comprising a resonator including: a first structure including a substrate and a first reflector stacked on each other; a second structure that includes a second reflector and is disposed on a side of the first structure corresponding to the first reflector; and an intermediate structure that includes an active layer and is disposed between the first and second structures, wherein the substrate includes a material having a lattice constant that is greater than a lattice constant of GaAs and less than a lattice constant of AlAs, and the first reflector and the intermediate structure include different material systems.

Facts

Company
Sony (Sony Group Corporation)
Official title
SURFACE EMITTING LASER AND RANGING DEVICE
Publication number
US20260269571A1
Application number
18873623
Filed
May 17, 2023
Published
Sep 10, 2026
Inventors
2
Claims
20

Classified under

H01S 5/18369 Electricity & electronicsH01S 5/18311 Electricity & electronicsH01S 5/3095 Electricity & electronicsH01S 5/343 Electricity & electronics
Read the full filing (official PDF) ↗ Open in the Patent Tracker

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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.