Enhancement of Magneto-optical Effect in Multilayer Structures Consisting of GaAs:MnAs nanoclusters and GaAs/AlAs DBRs.

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  • Shimizu H.
    Dept. of Electronic Engineering, the Univ. of Tokyo
  • Miyamura M.
    Dept. of Electronic Engineering, the Univ. of Tokyo
  • Tanaka M.
    Dept. of Electronic Engineering, the Univ. of Tokyo CREST, Japan Science and Technology Corporation

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Other Title
  • ＭｎＡｓナノクラスターとＧａＡｓ／ＡｌＡｓ半導体ＤＢＲからなる多層膜における磁気光学効果の増大
  • MnAs ナノクラスター ト GaAs AlAs ハンドウタイ DBR カラ ナル タソウ マク ニ オケル ジキ コウガク コウカ ノ ゾウダイ

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Abstract

We successfully fabricated a multilayer structure consisting of a semiconductor-magnetic hybrid material GaAs:MnAs and GaAs / AlAs distributed Bragg reflectors, which is a one-dimensional semiconductor-based magneto-photonic crystal. Significant enhancement of magneto-optical effect was demonstrated around 980 nm at room temperature and under a relatively low field of 0.1-0.2 T. Magneto-optical spectra of this multilayer system were well explained by theoretical calculations. The mechanism for enhancement of magneto-optical effect and the conditions required for application to optical isolators are discussed. Some approaches toward higher magneto-optical performance were investigated. Since our material system is composed of all semiconductor-based materials, our results potentially lead to a new class of magneto-optical devices integrated with III-V based optoelectronics.

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