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| Properties | 【Stoichiometric】 LiTaO3 (SLT) |
【Congruent】 LiTaO3 (CLT) |
|
| Crystal system | Trigonal |
||
| Space group | R3c |
||
| Curie temperture : Tc（℃） data | Tc（℃） |
690 695 (MgO-doped) |
|
| [Li2O]:[Ta2O5] mol ratio (estimated from Tc) |
49.95：50.05 |
||
| Lattice parameters | c0 (nm) |
0.51509 |
|
a0 (nm) |
1.3773 |
||
| Absorption edge2 data | (nm) |
270 |
|
| Refractive index3 data | no (nm) |
2.1770 (@633nm) |
|
ne (nm) |
2.1745 (@633nm) |
||
| Birefringence | ne-no(nm) |
-0.0025 (@633nm) |
|
| Linear EO constants4 | r31(pm/V) |
8.4 (@633nm) |
|
r33(pm/V) |
30.5 (@633nm) |
||
| Non-linear optical data constants5(Based on CLT figures) |
d31(pm/V) |
0.85 |
|
d33(pm/V) |
13.8 |
||
E-field for domain switch (coercive field)6 |
Ec (kV/mm) |
＜ 1.7 |
approx.1/13 of CLT |
| Thermal conductivity 7 data | W/(m・K) |
8.78 8.43 (MgO-doped) |
approx.2 times CLT |
| Photorefractive damage threshold8 data | MW/cm2@532nm |
2 |
approx.200 times CLT |
| GRIIRA 9 data | ppm/cm @3.6kW/cm2 CW Green |
<100 〜50 (MgO-doped) |
<1/3 of CLT |
1M.Nakamura et al., "Refractive Indices in Undoped and MgO-doped Near-Stoichiometric LiTaO3 Crystals", Jpn. J. Appl. Phys. 41 L465 (2002)
2Handbook of Advanced Electronic and Photonic Materials and Devices, edited by H.S. Nalwa, "Volume 4: Ferroelectrics and Dielectrics",
Chapter 2, p..62 (2002)
Chapter 2, p..62 (2002)
2 V.Gopalan et al., Crystal Growth, Characterization, and Domain Studies in Lithium Niobate and Lithium Tantalate Ferroelectrics
3M.Nakamura et al., "Refractive Indices in Undoped and MgO-doped Near-Stoichiometric LiTaO3 Crystals", Jpn. J. Appl. Phys. 41 L465 (2002)
4Onuki, K., Uchida, N., Saku, T., "Interferometric Method for Measuring Electro-ptic Coefficients in Crystals", J. Opt. Soc. Am. 62 (1972) 1030
5I.Shoji et al., "Absolute scale of second-order onlinear-optical coefficiencts" J.Opt. Soc. Am. B 14 p.2268 (1997)
6T.Hatanaka et al. "Quasi-phase-matched optical parametric oscillation with periodically poled stoichiometric LiTaO3", J.Opt. Soc. Am. B 14 p.2268 (1997)
7K. Kitamura et al., Oyo buturi 74, p.573 (2005)
8K..Kitamura et al., "Non-stoichiometric control of LiNbO3 and LiTaO3 in ferroelectric domain engineering for optical devices", Ferroelectrics
257, p.235 (2001)
257, p.235 (2001)
9K..Kitamura et al., "Non-stoichiometric control of LiNbO3 and LiTaO3 in ferroelectric domain engineering for optical devices", Ferroelectrics
257, p.235 (2001)
257, p.235 (2001)
