We propose a compact 2×2 multimode interferometer (MMI) based on hybrid plasmonic waveguide (HPW) and a mode converter (MC) to integrate this MMI on SOI platform. Both devices can operate at TE/TM states of polarization (SOP). The height of the dielectric interlayer, the width and length of HPW-MMI are optimized to be 100 nm, 1.84 μm and 4.01 μm. At λ = 1550 nm, the MMI exhibits the transmissions of 82% and 74%, the transmission imbalances of 0.57 dB and 0.23 dB, the extinction ratios of 31.77 dB and 32.08 dB, and the phase errors of 4.06° and 2.80°, for TE/TM SOP, respectively. The MC transforms the photonic waveguide modes to the corresponding HPW modes, as the inputs to the MMI. At λ=1550 nm, the MC exhibits the transmissions of 94.5% and 72.2%, the conversion efficiencies of 99.4% and 93.0%, and the extinction ratios of 16.19 dB and 13.71 dB, for TE/TM SOP, respectively.

我们提出了一种基于混合等离子体激元波导（HPW）和模式转换器（MC）的紧凑型2×2多模干涉仪（MMI），以将该MMI集成到SOI平台上。两种设备都可以在TE / TM极化状态（SOP）下运行。介电夹层的高度，HPW-MMI的宽度和长度被优化为100 nm，1.84μm和4.01μm。在λ= 1550 nm时，MMI的透射率为82％和74％，透射不平衡度为0.57 dB和0.23 dB，消光比为31.77 dB和32.08 dB，相位误差为4.06°和2.80°。 TE / TM SOP，分别。MC将光子波导模式转换为相应的HPW模式，作为MMI的输入。在λ= 1550 nm处，MC的透射率为94.5％和72.2％，转换效率为99.4％和93.0％，消光比为16.19 dB和13.71 dB，