Optical article exhibiting a large first hyperpolarizability
US5501821A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1993 |
| Grant date | Mar 26, 1996 |
| Priority date | — |
| Expiry date | Feb 19, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/3617
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical article, for the transmission of electromagnetic radiation. The optical article includes a medium, which exhibits a second-order electric susceptibility greater than 10.sup.-9 electrostatic units. The medium includes polar aligned dipole subunits. Each dipole subunit has a plurality of noncentrosymmetric molecular dipoles and a connector system. Each molecular dipole has an electron donor moiety, an electron acceptor moiety, and a linking moiety. The linking moiety has a pair of covalent bonds to the connector system. Each molecular dipole has a conjugated .pi. bonding system extending from the electron donor moiety along the linking moiety to the electron acceptor moiety to permit oscillation of the molecular dipole between a ground state and an excited state, which states differ in polarity. The connector system joins the linking moieties to complete a solitary ring or a system of fused rings, which retain the molecular dipoles in substantially parallel relative relation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.