Contact grating device with Fabry-Perot resonator for effective terahertz light generation
Contact grating device with Fabry-Perot resonator for effective terahertz light generation
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DOI：
10.1364/ol.39.005439
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发表时间：
2014-09-15
期刊：
影响因子：
3.6
通讯作者：
Maruyama, Momoko
中科院分区：
文献类型：
--
作者：
Tsubouchi, Masaaki;Nagashima, Keisuke;Maruyama, Momoko
提出了一种用于产生高功率太赫兹光的新型法布里-珀罗腔接触光栅器件的设计。我们在掺镁的化学计量比LiNbO 3衬底上淀积了由Ta 2 O 5和Al 2 O3组成的多层膜，并在最外层制作了光栅槽。多层膜的设计使得光栅衍射的光满足法布里-佩罗谐振腔的条件。因此，透射到LiNbO 3衬底中的光的部分，即，通过谐振腔提高了衍射效率。所制备的器件的衍射效率为71%，这是接近的优化设计的计算值为78%。还证明了接触光栅装置产生太赫兹光。利用2.7mJ的近红外泵浦光获得了0.41 μ J的THz输出。(C)2014年美国光学学会
A novel design for a contact grating device with an incorporated Fabry-Perot resonator is proposed for high-power terahertz (THz) light generation. We deposited a multilayer consisting of Ta2O5 and Al2O3 on a magnesium-doped stoichiometric LiNbO3 substrate and fabricated grating grooves on the outermost layer. The multilayer was designed such that conditions for a Fabry-Perot resonator were satisfied for light diffracted by the grating. Consequently, the fraction of light transmitted into the LiNbO3 substrate, i.e., the diffraction efficiency, was enhanced by the resonator. The diffraction efficiency of the fabricated device was 71%, which is close to the calculated value of 78% from the optimized design. THz light generation was also demonstrated with the contact grating device. The THz output of 0.41 mu J was obtained using near-infrared pump light of 2.7 mJ. (C) 2014 Optical Society of America