Films for non-linear optics
AssigneeBritish Technology Group Limited
InventorGeoffrey J. Ashwell
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Abstract
Multi-layer Langmuir-Blodgett films comprising alternate layers of an optically non-linear amphiphilic compound and a spacer compound wherein the spacer comprises at least two hydrophobic substituents, have high second order non-linear optical coefficients, are stable over a prolonged period and quadratic SHG enhancement based on the number of layers. They are useful in a variety of opto-electronic devices.
Claims29
An ordered non-centrosymmetric optically non-linear material comprising a multi-layer Langmuir-Blodgett film comprising alternate layers of an optically non-linear amphiphilic compound and a spacer compound, said spacer compound having the general formula ##STR3## wherein M and N represent carbocyclic or heterocyclic groups each respectively having at least one hydrophobic substituent group B or C containing a minimum of six carbon atoms and Y represents a divalent bridging group or atom.
Dependencies are inferred from the claim text.