期刊
OPTICS EXPRESS
卷 21, 期 12, 页码 14876-14887出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.21.014876
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资金
- EGIDE Cai Yuanpei Program
- NSFC/ANR Sino-French joint program (POSISLOT project)
- National Basic Research Program of China [2011CB301704]
- National Science Fund for Distinguished Young Scholars [61125501]
We theoretically investigate the possible increase of the second harmonic generation (SHG) efficiency in silicon compatible waveguides by considering an asymmetrical plasmonic slot waveguide geometry and a chi((2)) nonlinear polymer infiltrating the slot. The needed phase matching condition is satisfied between the fundamental waveguide mode at the fundamental frequency (FF) and second-order waveguide mode at the second harmonic frequency (SHF) by an appropriate design of the waveguide opto-geometrical parameters. The SHG signal generated in our starting waveguide is three orders of magnitude higher than those previously reported for a FF corresponding to lambda = 1550 nm. Then, the SHG performance was further improved by increasing the asymmetry of the structure where nonlinear coupling coefficients as large as 292 psm(-1)W(-1/2) are predicted. The device length is shorter than 20 mu m and the normalized SHG conversion efficiency comes up to more than 1 x 10(5) W(-1)cm(-2). (C)2013 Optical Society of America
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