| Budget Amount *help |
¥16,120,000 (Direct Cost: ¥12,400,000、Indirect Cost: ¥3,720,000)
Fiscal Year 2018: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
Fiscal Year 2017: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2016: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
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| Outline of Final Research Achievements |
Combining a conventional concept of “congruent” with the essentially new concept of “stoichiometry”; a material whose activities of its constituent elements can be unity is stoichiometric, we have developed cs-MgO:LiNbO3 (Li2O:Nb2O5:MgO = 45.30:50.00:4.70) by introducing Mg and vacancy, both of which are simultaneously congruent and stoichiometric. Activities of all constituent elements can be unity so that the equilibrium partition coefficient, k0 of every chemical species in the melt is unity. Thus, they yield no segregation of ionic species during growth so that there is no compositional change in growing crystals even if they experience the unexpected perturbation, which is not possible in the conventional congruent LiNbO3 (c-LiNbO3). They are easy to growth with extremely homogeneous composition and are effective to achieve excellent nonlinear optical properties.
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