Optical properties of (1-x)Pb(Zn1/3Nb2/3)O3-xPbTiO3 single crystals

Chongjun He; Huiling Hu; Hong Jia; Jiming Wang; Kongjun Zhu; Youwen Liu

doi:10.1117/12.2085085

24 October 2014 Optical properties of (1-x)Pb(Zn_1/3Nb_2/3)O₃-xPbTiO₃ single crystals

Chongjun He, Huiling Hu, Hong Jia, Jiming Wang, Kongjun Zhu, Youwen Liu

Proceedings Volume 9270, Optoelectronic Devices and Integration V; 92701A (2014) https://doi.org/10.1117/12.2085085
Event: SPIE/COS Photonics Asia, 2014, Beijing, China

Abstract

Optical properties of (1-x)Pb(Zn_1/3Nb_2/3)O₃-xPbTiO₃ (PZN-xPT, x=5%, 9% and 12%) single crystals have been comprehensively investigated. The PZN-xPT single crystals used in this study were grown using a high temperature flux method. Refractive indices (n_ij) were measured by the Brewster’s angles (θB=tan^-1n) at different wavelengths. Dispersion equations of refractive indices were obtained. After poled along [001] direction, the transmittance of PZN–12%PT single crystal is more than 65% from 0.5 to 5.8 μm, which is much higher than that of PZN–5%PT and PZN-9%PT single crystals. PZN–12%PT has a tetragonal phase, its spontaneous polarization PS is along [001] direction. After poling, it could form a single domain structure. Orientation and temperature dependences of the electro-optic coefficient were investigated at He-Ne laser by the Senarmont compensator method. Large effective electro-optic coefficient (γc = 430 pm/V) was observed in [001]-poled PZN-9%PT crystal. More importantly, γc of tetragonal PZN-12%PT is about 130 pm/V, which is almost unchanged in a temperature range -20~80 °C. The γc of PZN-xPT single crystals are much higher than that of widely used electro-optic crystal LiNbO₃ (γc = 20 pm/V). These excellent optical properties make the PZNxPT single crystals promising candidates for electro-optic modulation applications.

Citation Download Citation

Chongjun He, Huiling Hu, Hong Jia, Jiming Wang, Kongjun Zhu, and Youwen Liu "Optical properties of (1-x)Pb(Zn_1/3Nb_2/3)O₃-xPbTiO₃ single crystals", Proc. SPIE 9270, Optoelectronic Devices and Integration V, 92701A (24 October 2014); https://doi.org/10.1117/12.2085085

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KEYWORDS

Crystals

Electro optics

Refractive index

Optical properties

Transmittance

Crystallography

Single crystal X-ray diffraction

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