Talebi Nahid, Shahabadi Mahmoud, Khunsin Worawut, Vogelgesang Ralf
Photonics Research Laboratory, Center of Excellence for Applied Electromagnetic Systems, School of Electrical and Computer Engineering, University of Tehran, Tehran, Iran.
Opt Express. 2012 Jan 16;20(2):1392-405. doi: 10.1364/OE.20.001392.
The paper introduces a wavelength converter composed of a metallic finite 2-dimensional particle grating on top of an optical waveguide. The particles sustain plasmonic resonances which will result in the near-field enhancement and therefore, high conversion efficiency. Due to near-field interaction of the grating field with the propagating modes of the waveguide, the generated third harmonic wave is phase-matched to a propagating mode of the waveguide, while the fundamental frequency component is not coupled into the output waveguide of the structure. The performance of this structure is numerically investigated using a full-wave transmission line method for the linear analysis and a three-dimensional finite-difference time-domain method for the nonlinear analysis.
本文介绍了一种由光波导顶部的金属有限二维粒子光栅组成的波长转换器。这些粒子维持等离子体共振，这将导致近场增强，从而实现高转换效率。由于光栅场与波导传播模式的近场相互作用，产生的三次谐波与波导的传播模式相位匹配，而基频分量不耦合到该结构的输出波导中。使用全波传输线方法进行线性分析，以及三维有限差分时域方法进行非线性分析，对该结构的性能进行了数值研究。
