Cui Guo-Xin, Wu Zi-Jian, Wang Meng-Ying, Ming Yang, Xing Zheng, Qiu Kai, Yuan Lie-Rong, Tan Jun, Zhang Xue-Jin, Lu Yan-Qing
Opt Express. 2018 Feb 19;26(4):4194-4203. doi: 10.1364/OE.26.004194.
In this paper, we experimentally demonstrate the second harmonic generation of long-range surface plasmon polaritons via quasi-phase matching in lithium niobate. After depositing a 9/13 nm thick Au film on periodically poled lithium niobate, TiO of about 2.3 μm in thickness is evaporated on the sample as a refractive-index-matching material. This dielectric (periodically poled lithium niobate)-metal(Au)-dielectric(TiO) sandwich structure can support the transmission of long-range surface plasmon polaritons through it. By designing a moderate ferroelectric domain period of periodically poled lithium niobate, the phase mismatch between the fundamental wave and second harmonic wave of the long-range surface plasmon polaritons can be compensated and a second harmonic wave can be generated effectively. This can be used to provide integrated plasmonic devices with attractive applications in quantum and classic information processing.
在本文中，我们通过铌酸锂中的准相位匹配实验证明了长程表面等离激元极化激元的二次谐波产生。在周期性极化铌酸锂上沉积9/13纳米厚的金膜后，在样品上蒸发约2.3微米厚的TiO作为折射率匹配材料。这种电介质（周期性极化铌酸锂）-金属（金）-电介质（TiO）夹层结构能够支持长程表面等离激元极化激元通过它传输。通过设计周期性极化铌酸锂适度的铁电畴周期，可以补偿长程表面等离激元极化激元基波和二次谐波之间的相位失配，并有效地产生二次谐波。这可用于为量子和经典信息处理中的有吸引力的应用提供集成等离子体器件。
