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TeO2

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TeO2晶体,又称二氧化碲，是一种具有高品质因数的性能优良的声光晶体材料。TeO2晶体具有响应速度快，驱动功率小，衍射效率高，性能稳定可靠等优点。广泛应用于声光偏转器、声光调制器、声光谐波器、声光滤波器和可调谐滤波器等各类声光器件。用氧化碲制作的声光器件，在相同的通光孔径下，分辨率可有数量级的提高，因此TeO2晶体是一种拥有广阔应用前景的声光器件材料，尤其是声光调制器和声光谐波器，在光计算、光通讯和光显微成像等技术中有广泛的应用。

特点

  • 高折射率
  • 声音衰减小
  • 高品质因数
  • 出色的声光特性
  • 较大的声光品质因数
  • 对可见光具有高透明度

物理和化学特性

属性数值
化学式TeO2
摩尔质量159.60 g/mol
颜色无色
密度5.99 ± 0.03 /cm3
熔点733°C
硬度3-4莫氏硬度计
热膨胀10-6 К-1:
α11= 17.7;
α22 = 17.7;
α33= 5.5
对称性四方晶系, 422 (D4)
晶格参数a = 4.8122 Å;
c = 7.6157 Å
透过率>70% @ 633nm
发射范围0.33 ~ 5.0 μm
介电常数ε11 = 22.9; ε33 = 24.7
弹性常数·10-10 N/m2c11 = 5.57; c33 = 10.58; c44 = 2.65; c66 = 6.59; c12 = 5.12; c13 = 2.18
光弹性系数@0.6328 μmp11 = 0.0074; p12 = 0.187; p13 = 0.340; p31 = 0.0905; p33 = 0.240; p44 = -0.17; p66 = -0.0463

折射率

λ, μmnoneΔn = ne– no
0.40472.43152.61670.1852
0.43582.38342.55830.1749
0.46782.34782.51640.1686
0.482.33662.50360.167
0.50862.3152.47790.1629
0.54612.29312.4520.1589
0.58932.27382.42950.1557
0.63282.25972.41190.1522
0.64382.25622.40860.1524
0.692.2452.39550.1505
0.82.2262.3730.147
12.2082.3520.144

光学活性，沿[001]

λ, μmp, deg/mmλ, μmp, deg/mm
0.3698587.10.5893104.9
0.3783520.60.632886.9
0.3917437.40.767.4
0.4152337.60.848.5
0.43822710.937.4
0.463221.1129.5
0.4995171.21.123.8
0.53143.4  

声光特性：λ=0.6328μm

NsoundUsoundVsound 103 м/сNlightElightM1 10-7сm2 · с/гM210-18с3/г
[100][100]2.98[010][100]0.0970.048
[100][100]–[010][001]22.910.6
[001][001]4.26[010][100]14234.5
[001][001]–[010][001]11325.6
[100][010]3.04[001]optional3.71.76
[110][110]4.21[-110][110]3230.802
[110][110]–[-110][001]16.23.77
[101][101]3.64[-101][010]10133.4
[010][010]2.98[-101][101]42.620.4
[110][-110]0.617[001]optional68.6793
[101][-101]2.08[010][100]76.477

TeO2调制器特性

АОM的主要特点TeO2调制器的典型值
光学波长范围514nm, 633nm, 1064nm, 1330nm
光学孔径0.3 mm – 3 mm
工作模式纵向的, 轴(001)
光上升时间光束直径为9-200 nsec
光束分离（633 nm）10-30 mrad
衍射效率70-85 %
调制频率（-3db）6-50 MHz

TeO2偏转器特性

АОD的主要特点TeO2偏转器的典型值
光学波长范围540nm-530nm, 630nm-850nm, 700nm-1100nm, 1064nm, 1330nm
光学孔径1 mm – 10 mm
工作模式>横波，轴3-15度（110）
中心频率20- 200 MHz
带宽20-100 MHz
衍射效率60-95%
时间光圈1-15 μs
分辨率（T.BW产品）200-2000
光上升时间光束直径为9-200 nsec
偏角10-100 mrad
Δ偏转角5-50 mrad
射频输入功率0,1- 2 Wt

TeO2可调谐滤波器特性

АОTF的主要特点TeO2 AOTF的典型值
调谐范围450-750nm, 900-1200nm, 1200-2500nm, 2500-5000nm
带宽0.5 nm – 15 nm
工作模式慢剪切，非共线传播
角孔2-10度
光学孔径3×3 mm – 30×30 mm
衍射效率70-85 %
射频功率1-10 Wt

参考文献

[1]  Mirzaei A ,  Park S ,  Sun G J , et al. CO gas sensing properties of In4Sn3O12 and TeO2 composite nanoparticle sensors[J]. Journal of Hazardous Materials, 2016, 305(Mar.15):130-138.
[2]  Dafinei I ,  Diemoz M ,  Longo E , et al. Growth of pure and doped TeO2 crystals for scintillating bolometers[J]. Nuclear Inst & Methods in Physics Research A, 2005, 554(1-3):195-200.
[3]  Kokh A E ,  Shevchenko V S ,  Vlezko V A , et al. Growth of TeO2 single crystals by the low temperature gradient Czochralski method with nonuniform heating[J]. Journal of Crystal Growth, 2013, 384(dec.1):1-4.
[4] S, Kumaragurubaran, and, et al. Investigations on the growth of Bi2TeO5 and TeO2 crystals[J]. Journal of Crystal Growth, 1999.
[5]  Beke S ,  Kobayashi T ,  Sugioka K , et al. Time-of-flight mass spectroscopy of femtosecond and nanosecond laser ablated TeO2 crystals[J]. International Journal of Mass Spectrometry, 2011, 299(1):5-8.
[6]  Casali N ,  Bellini F ,  Dafinei I , et al. Monte Carlo simulation of the Cherenkov radiation emitted by TeO2 crystal when crossed by cosmic muons[J]. Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment, 2013, 732(dec.21):338-341.
[7] Jalilian, Jaafar, Naseri, et al. Electronic and optical properties of paratellurite TeO2 under pressure: A first-principles calculation[J]. Journal for Light & Electronoptic, 2017.
[8]  Syrbu N N ,  Cre?U R V . The superposition of one- and two-phonon absorption and radiation in TeO2 crystal[J]. Infrared Physics & Technology, 1996, 37(7):769–775.
[9]  Mangin J ,  Veber P . PtTe2: Potential new material for the growth of defect-free TeO2 single crystals[J]. Journal of Crystal Growth, 2008, 310(12):3077-3083.
[10]  Sudha A ,  Maity T K ,  Sharma S L , et al. An extensive study on the structural evolution and gamma radiation stability of TeO 2 thin films[J]. Materials Science in Semiconductor Processing, 2018, 74:347-351.
[11] A, Watterich, and, et al. Paramagnetic and diamagnetic defects in e− and UV-irradiated TeO2 single crystal[J]. Nuclear Instruments & Methods in Physics Research, 2002.
[12]  B C A A ,  B C B A ,  D A B C , et al. Production of high purity TeO 2 single crystals for the study of neutrinoless double beta decay[J]. Journal of Crystal Growth, 2010, 312( 20):2999-3008.
[13] High-stability acousto-optical devices using bulk acoustic waves in TeO2[J]. Electronics Letters, 2007, 14(17):535-536.
[14]  Barucci M ,  Brofferio C ,  Giuliani A , et al. Measurement of Low Temperature Specific Heat of Crystalline TeO2 for the Optimization of Bolometric Detectors[J]. Journal of Low Temperature Physics, 2001, 123(5-6):303-314.
[15]  Xun G ,  Shang X , D Zhang. Study on SAW characteristics of amorphous-TeO2/36°Y-X LiTaO3 structures. IEEE, 2009.
[16]  Stavrakieva D ,  Ivanova Y ,  Pyrov J . On the composition of the crystal phases in the PbO TeO2 system[J]. Journal of Materials Science, 1988, 23(5):1871-1876.
[17]  Yong J K ,  Choi S W ,  Kang S Y , et al. Enhancement of the benzene-sensing performance of Si nanowires through the incorporation of TeO2 heterointerfaces and Pd-sensitization[J]. Sensors and Actuators B Chemical, 2017, 244(jun.):1085-1097.
[18] Physical properties and structural studies of lithium borophosphate glasses containing TeO 2[J]. Journal of Solid State Chemistry, 2019, 270:547-552.
[19]  Nagarajan V ,  Chandiramouli R . DFT investigation of NH3 gas interactions on TeO2 nanostructures[J]. Progress in Natural Science: Materials International, 2016, 26( 2):129-138.
[20]  Park S ,  An S ,  Ko H , et al. Enhancement of ethanol sensing of TeO2 nanorods by Ag functionalization[J]. Current Applied Physics, 2013, 13(3):576-580.

光谱

声光晶体TeO2谱图-CRYLINK

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