arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2001.10430physics.app-phphysics.optics
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微腔中嵌入相变材料实现的电可重构硅光子滤波器

Electrically reconfigurable silicon photonic filter enabled by embedded phase change material in microring resonator

Nadir Ali, Rajesh Kumar

摘要:

报道了一种基于硅微腔中嵌入相变材料$Ge_{2}Sb_{2}Te_{5}$的可调谐光滤波器。非晶相$Ge_{2}Sb_{2}Te_{5}$的高热光系数使得能够以非常小的有效体积在宽范围内调谐谐振波长。采用低损耗的氧化铟锡电极在$Ge_{2}Sb_{2}Te_{5}$ -Si有源波导区产生焦耳热。在有源区中的电诱导加热改变了混合微晶体的有效折射率,从而导致对于仅3V的施加电压的1.04nm的波长调谐。该器件具有20-41 dB的高消光比和仅0.96 $μm^{2}$的紧凑有源封装,适用于大规模可重构集成光子电路。

英文摘要:

We report a tunable optical filter based on phase change material $Ge_{2}Sb_{2}Te_{5}$ embedded in a silicon microring resonator. The high thermo-optic coefficient of $Ge_{2}Sb_{2}Te_{5}$ in amorphous phase enables tuning of resonance wavelength in broad range with a very small active volume. The low-loss indium-tin-oxide electrodes are employed to induce Joule heating in $Ge_{2}Sb_{2}Te_{5}$-Si active waveguide region. The electrically induced heating in the active region alters the effective refractive index of hybrid microring resulting in a wavelength tuning of 1.04 nm for an applied voltage of only 3V. The device exhibits high extinction ratios in the range of 20-41 dB and a compact active footprint 0.96 $μm^{2}$ only and is suitable for the large scale reconfigurable integrated photonic circuits.

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