Continuous wave directional emission liquid crystal structures and devices
US9303209B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 2013 |
| Grant date | Apr 5, 2016 |
| Priority date | — |
| Expiry date | Jun 18, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/213
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light emitting photonic bandgap (PBG) material, and devices uses the same, having (a) a polymer network exhibiting a non-uniform pitch; (b) a small molecule liquid crystal material with a birefringence>0.04; and (c) one or more light emitting dyes having a low triplet state absorption. The light emitting PBG material has a defect-induced density of states enhancing feature at a wavelength that overlaps the emission spectrum of the light emitting dye. Excitation of the light emitting PBG material by a light source causes a directional electromagnetic emission from the light emitting material. The PBG material, and device, are capable of emitting continuous wave laser light as a result of excitation by a low-power incoherent light source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.