Monolithically-Integrated TE-mode 1D Silicon-on-Insulator Isolators using Seedlayer-Free Garnet.

Monolithically-Integrated TE-mode 1D Silicon-on-Insulator Isolators using Seedlayer-Free Garnet.
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DOI:
10.1038/s41598-017-06043-z
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发表时间:
2017-07-19
期刊:
影响因子:
4.6
通讯作者:
Hutchings DC
Hutchings DC
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Zhang C;Dulal P;Stadler BJH;Hutchings DC

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首次实现了利用法拉第旋转的TE模式SOI隔离器,填补了源集成近红外光子电路中的“缺失环节”。隔离器是简单的一维2元件波导,其中石榴石包层和纵向磁场产生非互易模式转换,波导等效于法拉第旋转(FR)。准相位匹配包层被用来克服双折射的限制。目前的实验SOI隔离器在干涉仪或环形谐振器中使用非互易相移(NRPS),但到目前为止,NRPS需要TM模式,因此通常由集成激光器产生的TE模式不能在没有许多辅助偏振控制的情况下被隔离。所提出的FR隔离器通过光刻和溅射沉积制成,与NRPS器件制造中使用的脉冲激光沉积或晶片键合相比,其允许容易的升级。在这里,获得了11 dB和4 dB的隔离比和损耗,并且未来的设计能够实现隔离比>30 dB,损耗<6 dB。
The first experimental TE-mode silicon-on-insulator (SOI) isolators using Faraday Rotation are here realized to fill the ‘missing link’ in source-integrated near infrared photonic circuits. The isolators are simple 1D 2-element waveguides, where garnet claddings and longitudinal magnetic fields produce nonreciprocal mode conversion, the waveguide equivalent of Faraday Rotation (FR). Quasi-phase matched claddings are used to overcome the limitations of birefringence. Current experimental SOI isolators use nonreciprocal phase shift (NRPS) in interferometers or ring resonators, but to date NRPS requires TM-modes, so the TE-modes normally produced by integrated lasers cannot be isolated without many ancillary polarisation controls. The presented FR isolators are made via lithography and sputter deposition, which allows facile upscaling compared to the pulsed laser deposition or wafer bonding used in the fabrication of NRPS devices. Here, isolation ratios and losses of 11 dB and 4 dB were obtained, and future designs are identified capable of isolation ratios >30 dB with losses <6 dB.
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