Development of ultra-compact and highly-efficient wavelength convertors based on hybrid-phase matching

数值模拟表明，采用横向反转芯结构的混合模式相位匹配和准相位匹配波长转换器在53.4mm长的波导中可获得高达47400%/W的转换效率，并可折叠成1.1mm × 3.5mm的区域。采用室温表面活化键合技术，成功地制备了具有横向反转芯结构的高折射率对比度AlGaAs/Alox（AlAs氧化层）波导。并提出了一种新型的横向反转结构的波长转换器，以产生倍频矢量光束。

I have showed by numerical simulation that a hybrid modal-phase-matching and quasi-phase-matching wavelength convertor with laterally inverted core structure can achieve conversion efficiency as high as 47400 %/W in a 53.4-mm-long waveguide and be folded up into a 1.1 mm × 3.5 mm domain. By using surface activation bonding technique at room temperature, I have succeeded in fabricating high-index-contrast AlGaAs/Alox (AlAs oxidation layer) waveguides with laterally inverted core structure. And I have proposed a novel wavelength convertor with laterally inverted structure in order to generate frequency-doubled vector-beam.