Ferroelectric crystals with giant electro-optic property enabling ultracompact Q-switches
Ferroelectric crystals with giant electro-optic property enabling ultracompact Q-switches
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DOI：
10.1126/science.abn7711
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发表时间：
2022-04-22
期刊：
影响因子：
56.9
通讯作者：
Zhang, Shujun
中科院分区：
文献类型：
--
作者：
Liu, Xin;Tan, Peng;Zhang, Shujun
Relaxor-lead titanate (PbTiO3) crystals, which exhibit extremely high piezoelectricity, are believed to possess high electro-optic (EO) coefficients. However, the optical transparency of relaxor-PbTiO3 crystals is severely reduced as a result of light scattering and reflection by domain walls, limiting electro-optic applications. Through synergistic design of a ferroelectric phase, crystal orientation, and poling technique, we successfully removed all light-scattering domain walls and achieved an extremely high transmittance of 99.6% in antireflection film-coated crystals, with an ultrahigh EO coefficient r(33) of 900 picometers per volt (pm V-1), >30 times as high as that of conventionally used EO crystals. Using these crystals, we fabricated ultracompact EO Q-switches that require very low driving voltages, with superior performance to that of commercial Q-switches. Development of these materials is important for the portability and low driving voltage of EO devices.
