Nonlinear optical material and its method of manufacture
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorKazufumi Ogawa
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Abstract
A new nonlinear organic optical material having a high Second Harmonic Generation capability and a method of manufacturing the same is disclosed. Energy-beam sensitive monomer molecules having large molecular dipole-moments are sandwiched between two facing orientation films formed on respective substrates, and the energy-beam sensitive parts in said molecules are polymerized by irradiation with an energy-beam such as an X-ray beam after the dipole-moments of the energy-beam sensitive monomer molecules are aligned by applying a magnetic or an electric field. As a result of this, no cancellation of dipole-moments takes place, and polymers having extremely high dipole-moments and high Second Harmonic Generation efficiency can be derived and manufactured.
Claims8
A method of manufacturing a nonlinear optical material comprising:
- forming an organic orientation film on a surface of each of two substrates;
- positioning said substrates in a spaced apart relationship with said organic orientation films in a face to face relationship to establish a gap therebetween;
- introducing energy-beam sensitive monomer molecules which are derivatives of a ferroelectric liquid crystal and having a large dipole moment which results in orientation in an aligned direction when exposed to a magnetic field into said gap, said energy-beam sensitive monomer molecules having energy-beam sensitive parts comprising diacetylene groups bonded via CH.sub.2 groups;
- applying a magnetic field in order to align the directions of said dipole-moments, and
- irradiating said monomer molecules having aligned dipole-moments with an energy-beam in order to polymerize the energy-beam sensitive parts of said monomer molecules.
A method of manufacturing a nonlinear optical material comprising:
- forming an organic orientation film overlying an electrode on a surface of each of two substrates;
- positioning said substrates in a spaced apart relationship with said organic orientation films in a face to face relationship to establish a gap therebetween;
- introducing energy-beam sensitive monomer molecules which are derivatives of a ferroelectric liquid crystal and having a large dipole moment which results in orientation in an aligned direction when exposed to an electric field into said gap, said energy-beam sensitive monomer molecules having energy-beam sensitive parts comprising diacetylene groups bonded via CH.sub.2 groups;
- applying an electric field between said electrodes in order to align the directions of said dipole-moments, and
- irradiating said monomer molecules having aligned dipole-moments with an energy-beam in order to polymerize said energy-beam sensitive parts in said monomer molecules.
A method of manufacturing a nonlinear optical material comprising:
- providing at least two substrates comprising a material selected from the group consisting of a hydrophilic glass and quartz;
- forming polyimide coatings on a surface of each of said at least two substrates;
- orienting said polyimide coatings by rubbing to form orientation films on said coated surfaces;
- positioning said substrates in a spaced apart relationship with said orientation films in a face to face relationship to establish a gap therebetween;
- introducing into said gap energy-beam sensitive monomer molecules which comprise
- derivatives of a ferroelectric liquid crystal having a large dipole moment, said derivatives selected from the group consisting of azomethine, azoxy, and ester compounds, and
- an energy-beam sensitive part bonded to said derivatives via CH.sub.2 groups, said energy beam sensitive part comprising a diacetylene group;
- applying a magnetic field in order to align the directions of said dipole-moments, and
- irradiating said monomer molecules having aligned dipole-moments with an energy-beam in order to polymerize the energy-beam sensitive parts of said monomer molecules.
A method of manufacturing a nonlinear optical material comprising:
- providing at least two substrates comprising a material selected from the group consisting of a hydrophilic glass and quartz, said substrates having an electrode on a surface of each of said at least two substrates;
- forming polyimide coatings overlying said electrodes on said surface of each of said substrates;
- orienting said polyimide coatings by rubbing to form orientation films on said coated surfaces;
- positioning said substrates in a spaced apart relationship with said orientation films in a face to face relationship to establish a gap therebetween;
- introducing into said gap energy-beam sensitive monomer molecules which comprise
- derivatives of a ferroelectric liquid crystal having a large dipole moment, said derivatives selected from the group consisting of azomethine, azoxy, and ester compounds, and
- an energy-beam sensitive part bonded to said derivatives via CH.sub.2 groups, said energy beam sensitive part comprising a diacetylene group;
- applying an electric field in order to align the directions of said dipole-moments, and
- irradiating said monomer molecules having aligned dipole-moments with an energy-beam in order to polymerize the energy-beam sensitive parts of said monomer molecules.
Dependencies are inferred from the claim text.