Optical and magnetic microstructures in YIG ferrite fabricated by femtosecond laser

Atsushi Ishikawa, Tomohiro Amemiya, Yuya Shoji, Pham Nam Hai, Masaaki Tanaka, Tetsuya Mizumoto, Shigehisa Arai, Takuo Tanaka

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Optical and magnetic microstructures are directly fabricated inside a film of cerium-substituted yttrium iron garnet (Ce:YIG) by using a direct femtosecond laser writing. The laser irradiation in-duces local changes in both optical and magnetic properties of Ce:YIG. A quantitative phase imag-ing technique proves that the refractive index is increased by 0.015 ± 0.001, which is about 0.7% of Ce:YIG refrative index 2.2 at 632.8 nm. The magneto-optical polar Kerr effect measurement shows that the magnetization property is changed from hard to soft, decreasing the coercivity. Our pro-posed technique paves the way toward the development of novel three-dimensional magneto-optical devices for optical communication and photonic applications.

Original languageEnglish
Pages (from-to)48-52
Number of pages5
JournalJournal of Laser Micro Nanoengineering
Volume10
Issue number1
DOIs
Publication statusPublished - 2015

Keywords

  • Femtosecond laser fabrication
  • Integrated optics
  • Magneto-optical materials
  • Multi-photon absorption
  • Three-dimensional structures

ASJC Scopus subject areas

  • Instrumentation
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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