Quasi-phase-matched second harmonic generation of long-range surface plasmon polaritons

Optics Express
Guo-Xin CuiYan-qing Lu

Abstract

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, TiO2 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(TiO2) 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.

References

May 16, 2007·Nano Letters·A DrezetJoachim R Krenn
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Oct 9, 2015·Scientific Reports·Fan Yang, Zhong Lei Mei
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Sep 23, 2016·ACS Nano·Weiwei WanXiaodong Yang

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