Harmonic light-generating metasurface
US-11500265-B2 · Nov 15, 2022 · US
Self-isolated nanoscale laser
US12548964B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12548964-B2 |
| Application number | US-202118021009-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 16, 2021 |
| Priority date | Aug 14, 2020 |
| Publication date | Feb 10, 2026 |
| Grant date | Feb 10, 2026 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
Self-isolated lasers are provided by using a chiral metasurface in combination with a spin-selective gain medium and symmetry-breaking (i.e., not linearly polarized) optical pumping. In preferred embodiments the chiral metasurface is resonant, thereby proving an integrated optical resonator to support lasing. The chiral metasurface can be the spin-selective gain medium, or it can be formed on a surface of the spin-selective gain medium, or it can be distinct from the spin-selective gain medium.
First claim
Opening claim text (preview).
The invention claimed is: 1 . A self-isolated coherent light source comprising: a pump source configured to provide pump radiation having a not-linear state of polarization; a spin-selective gain medium configured to provide gain when excited by the pump radiation; an optical resonator configured to define a lasing mode when the spin-selective gain medium is excited by the pump radiation; and a chiral metasurface configured to provide less loss to the lasing mode than to a back-reflection of the lasing mode. 2 . The self-isolated coherent light source of claim 1 , wherein the pump radiation has an ellipticity e of its state of polarization such that 0.5≤|e|≤1.0. 3 . The self-isolated coherent light source of claim 2 , wherein the pump radiation has an ellipticity e of its state of polarization such that 0.9≤|e|≤1.0. 4 . The self-isolated coherent light source of claim 1 , wherein the spin-selective gain medium is a Raman-active medium. 5 . The self-isolated coherent light source of claim 1 , wherein the spin-selective gain medium is an inversion-asymmetric transition metal dichalcogenide. 6 . The self-isolated coherent light source of claim 1 , wherein the chiral metasurface is formed of a surface of the spin-selective gain medium. 7 . The self-isolated coherent light source of claim 1 , wherein the chiral metasurface is the spin-selective gain medium. 8 . The self-isolated coherent light source of claim 1 , wherein the chiral metasurface is distinct from the spin-selective gain medium. 9 . The self-isolated coherent light source of claim 1 , wherein the chiral metasurface is distinct from the optical resonator. 10 . The self-isolated coherent light source of claim 1 , wherein the chiral metasurface has a resonance that serves as the optical resonator. 11 . The self-isolated coherent light source of claim 1 , wherein the chiral metasurface has a quality factor Q of 10 or more.
Assignees
Inventors
Classifications
transition metal · CPC title
- H01S3/094073Primary
Non-polarized pump, e.g. depolarizing the pump light for Raman lasers · CPC title
using scattering effects, e.g. stimulated Brillouin or Raman effects · CPC title
characterised by a semiconducting matrix · CPC title
by coherent light · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US12548964B2 cover?
- Self-isolated lasers are provided by using a chiral metasurface in combination with a spin-selective gain medium and symmetry-breaking (i.e., not linearly polarized) optical pumping. In preferred embodiments the chiral metasurface is resonant, thereby proving an integrated optical resonator to support lasing. The chiral metasurface can be the spin-selective gain medium, or it can be formed on a…
- Who is the assignee on this patent?
- Univ Leland Stanford Junior
- What technology area does this patent fall under?
- Primary CPC classification H01S3/094073. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Feb 10 2026 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).