摘要:
Nonlinear optically active compounds, methods for making nonlinear optically active compounds, compounds useful for making nonlinear optically active compounds, methods for making compounds useful for making nonlinear optically active compounds, macrostructures tha tinclude nonlinear optically active components, and devices including the nonlinear optically active compounds and the macrostructures.
摘要:
Materials suitable for use in non-linear optical devices comprise morpholinium or thiomorpholinium salts of hydroxy-substituted aliphatic or aromatic carboxylic acids selected from tartaric acid and hydroxy-substituted benzoic and cinnamic acids, which salts have a non-centrosymmetric crystalline form. Preferred salts include morpholinium 3-hydroxybenzoate, morpholinium 4-hydroxybenzoate, morpholinium 3,5-dihydroxybenzoate, morpholinium 3-fluoro-4-hydroxybenzoate, dimorpholinium 2,3,5,6-tetrafluoro-4-hydroxybenzoate, morpholinium 4-(4-hydroxyphenyl)benzoate, morpholinium tartrate, morpholinium 4-hydroxycinnamate, thiomorpholinium 4-hydroxybenzoate and thiomorpholinium 3,5-dihydroxybenzoate.
摘要:
The present invention provides ferroelectric liquid crystal and liquid crystal compounds, among which are compounds which possess large X(2), i.e. second order nonlinear susceptibility and thus make them useful in nonlinear optical applications.
摘要:
A three-dimensional molecular array on one of a conductor and semiconductor surface is disclosed. The array comprises at least one columnar stack comprising a plurality of substituted aromatic rings, wherein the aromatic rings of each columnar stack lie about parallel to the surface, wherein the columnar stack comprises a plurality of hydrogen bonds between substituents of different rings. Each stack may include aromatic amides in which the amido group is not coplanar with the aromatic core. A method for the synthesis of such aromatic amides is also disclosed. The aromatic amides may also be used to prepare pyro-ferro-, and piezo electric devices, as well as nonlinear optical devices and conductors, which comprise the columnar stacks described.
摘要:
Second-order nonlinear optical (NLO) polyene-based chromophores sterically stabilized with a dioxine ring and NLO chromophores containing bithiophene derivatives, and devices incorporating the same, are disclosed. An exemplary preferred chromophore includes an aminophenyl electron donor group and a dioxine-containing bridge structure. Another exemplary preferred chromophore includes a ring-locked bridge structure with a dioxine unit and a bithiophene unit. Another exemplary preferred chromophore includes a bridge structure with a bithiophene unit and an isophorone-derived cyclohexene unit.
摘要:
Sterically stabilized polyene-bridged second-order nonlinear chromophores and devices incorporating the same are embodied in a variety of chromophore materials. An exemplary preferred chromophore includes an electron donor group, an electron acceptor group and a pi-conjugate bridge structure therebetween. The bridge is a polyene structure having a five-, six- or seven-membered ring to lock one carbon-carbon double bond. The bridge contains an unlocked conjugate diene unit which connects the bridge ring and the acceptor. A preferred host polymer for the chromophores is poly[bisphenol A carbonate-co-4,4'-(3,3,5-trimethylcyclohexylidene)diphenol carbonate].
摘要:
A monlinear optically-active azo dye monomer comprising functionalities at opposite ends thereof which have differing reactivities, thus allowing the functionalities to be reacted in a stepwise fashion. The monomers can be incorporated into both linear and crosslinked polymers useful in electrooptic devices.
摘要:
It is the objective of the present invention to provide a Terahertz laser system. This objective is achieved according to the invention by a Terahertz laser apparatus, for example for use in skin cancer treatments, comprising: • a) a pump laser for generating a collimated near/mid-infrared pump laser pulse; • b) an organic crystal which receives the collimated near/mid-infrared pump laser pulse thereby generating Terahertz radiation by optical rectification in the nonlinear organic crystal; and • c) a low-pass filter for separating collimated near/mid-infrared pump laser pulse from the generated Terahertz radiation.
摘要:
Sterically stabilized second-order nonlinear optical chromophores and devices incorporating the same are embodied in a variety of chromophoric materials. An exemplary chromophore includes an electron donor group, an electron acceptor group and a ring-locked bridge structure therebetween.
摘要:
Devices and materials containing certain stable, polycyclic aromatic compounds exhibit sensible, second order nonlinear optical effects. In general, useful polycyclic aromatic compounds possess electron-donating and electron-withdrawing chemical functionality but no center of inversion symmetry on either the molecular or crystalline unit cell level.