Nonlinear optical materials
AssigneeNippon Oil Co., Ltd.
InventorsHiroyuki Itoh, Takafumi Ishii, Takehiro Toyooka, Tetsuo Satoh
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Abstract
A nonlinear optical material having a high nonlinear optical constant useful for frequency doubler of laser beam which comprises a chiral smectic C liquid crystalline polyester consisting essentially of the structural units having the general formulae (A), (B) and (C); ##STR1## Wherein X is a structural unit selected from the group consisting of ##STR2## Wherein Y is a group having at least one optically active carbon and the total carbon number of Y is 3-12. ##STR3## wherein n is an integer of 2-10.
Claims16
A nonlinear optical material comprising (a) a compound exhibiting a nonlinear optical response and having a secondary molecular susceptibility larger than 1.times.10.sup.-30 esu and (b) a chiral smectic C liquid crystalline polyester consisting essentially of the structural units having the general formulae (A), (B) and (C):
- ##STR22## wherein X is a structural unit selected from the group consisting of ##STR23## wherein Y is a structural unit having the general formula ##STR24## wherein a and b are each an integer of 0-10, the sum of a and b is in the range of 2-11, a is not equal to b, and Z is C.sub.1-3 alkyl, F, Cl or Br and ##STR25## wherein n is an integer of 2-10.
Dependencies are inferred from the claim text.