Dysprosium Substituted Ce:YIG Thin Films for Temperature Insensitive Integrated Optical Isolator Applications

Zixuan Wei; Wei Yan; Jun Qin; Longjiang Deng; Lei Bi

doi:10.3390/ma15051691

Dysprosium Substituted Ce:YIG Thin Films for Temperature Insensitive Integrated Optical Isolator Applications

Materials (Basel). 2022 Feb 24;15(5):1691. doi: 10.3390/ma15051691.

Authors

Zixuan Wei¹, Wei Yan¹, Jun Qin¹, Longjiang Deng¹, Lei Bi¹

Affiliation

¹ National Engineering Research Center of Electromagnetic Radiation Control Materials, University of Electronic Science and Technology of China, Chengdu 610054, China.

Abstract

Magneto-optical isolators are key components in photonic systems. Despite the progress of silicon-integrated optical isolators, the Faraday rotation of silicon-integrated magneto-optical materials, such as cerium-doped yttrium iron garnet (Ce:YIG), show a strong temperature dependence, limiting the temperature range for integrated nonreciprocal photonic device applications. In this work, we report dysprosium substituted Ce:YIG thin films (Dy₂Ce₁Fe₅O₁₂, Dy:CeIG) showing a low temperature coefficient of Faraday rotation. A temperature insensitive range of the Faraday rotation is observed in between 25 °C to 70 °C for this material, compared to 20% variation of the Faraday rotation in Ce:YIG thin films. A Dy:CeIG based temperature insensitive silicon-integrated optical isolator operating in the temperature range of 23 °C to 70 °C is experimentally demonstrated.

Keywords: faraday rotation; magneto-optical materials; temperature insensitivity.

Abstract

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