Waveguide-based 1.5 μm optical isolator based on magneto-optic effect in ferromagnetic MnAs
Waveguide-based 1.5 μm optical isolator based on magneto-optic effect in ferromagnetic MnAs
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DOI：
10.1143/jjap.46.205
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发表时间：
2007-01-01
期刊：
影响因子：
--
通讯作者：
Nakano, Yoshiaki
中科院分区：
文献类型：
--
作者：
Amemiya, Tomohiro;Shimizu, Hiromasa;Nakano, Yoshiaki
基于非互易损耗现象，我们研制了一种1.5微米m波段横向磁模波导隔离器。该器件由一个带有InGaAs/InGaAlAs多量子阱放大器的光波导和一个连接在光波导上的铁磁性MNAs层组成。光波导和磁化的MNAs层的组合产生了一种称为非互易损耗的磁光效应--这种现象是光在后向传播时的传播损耗大于在前向传播时的传播损耗。给出了该装置结构设计的指导原则。采用分子束外延生长的MNAs外延层的原型器件，在1.54微米波长下的非互易度为9.8dB/mm。该器件可以与InP衬底上的光波导单片集成。
We developed a 1.5-mu m-band, transverse-magnetic-mode waveguide isolator based on the nonreciprocal-loss phenomenon. The device consists of an optical waveguide with an InGaAs/InGaAlAs multiple-quantum-well amplifier and a ferromagnetic MnAs layer attached to the waveguide. The combination of the optical waveguide and the magnetized MnAs layer produces a magneto-optic effect called the nonreciprocal loss-a phenomenon where the propagation loss of light is larger in backward than in forward propagation. We present the guiding principle of the design of the structure of the device. A prototype device with a MBE-grown epitaxial MnAs layer showed a nonreciprocity of 9.8 dB/mm, at a wavelength of 1.54 mu m. Our device can be monolithically integrated with waveguide-based optical devices on an InP substrate.