Non-linear optical device
AssigneeHitachi, Ltd.
InventorsYuzo Ito, Hiromu Terao, Kayo Ono, Sukekazu Aratani, Masato Isogai, Atsushi Kakuta
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Abstract
According to the present invention, there is provided a non-linear optical device comprising a non-linear optical medium comprising an organic compound, which remarkably improves the non-linear optical properties. The non-linear optical device according to the present invention is suited for the second and third harmonic generations, photomixing optical parametric oscillations, optical switches and optical bistable devices.
Claims7
In a non-linear optical element device comprising a non-linear optical medium, the improvement wherein the non-linear optical medium includes a compound exhibiting an SHG value equal to or larger than urea and having the general formula, ##STR36## wherein at most two of R.sup.1 and R.sup.4 and at most two of R.sup.7 to R.sup.10 are substituents independently selected from the group consisting of --NO.sub.2, --NH.sub.2, --Cl, --Br, --OH, --CH.sub.3 and --OCH.sub.3, and the rest of R.sup.1 to R.sup.4 and R.sup.7 to R.sup.10 are hydrogen, the number of the substituents for R.sup.1 to R.sup.4 and R.sup.7 to R.sup.10 being one to three, provided that the total number of the substituents independently selected for R.sup.1 to R.sup.4 and R.sup.7 to R.sup.10 is one or two when each of the substituents independently selected is --NO.sub.2.
Dependencies are inferred from the claim text.