Light modulation element, optical device including the light modulation element, and electronic device including the optical device
US11108213B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 28, 2020 |
| Grant date | Aug 31, 2021 |
| Priority date | — |
| Expiry date | Mar 4, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/2228
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light modulation element according to example embodiments includes a substrate; a first lower DBR layer on the substrate including a first material layer alternately stacked with a second material layer having a different refractive index from the first material layer; a second lower DBR layer on the first lower DBR layer with a surface area less than the first lower DBR layer and including a third material layer alternately stacked with a fourth material layer having a different refractive index from the third material layer; an active layer on the second lower DBR layer, including a semiconductor material having a multi-quantum well structure and having a refractive index that varies according to an applied voltage; and an upper DBR layer on the active layer including a fifth material layer alternately stacked with a sixth material layer having a different refractive index from the fifth material layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.