Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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Optical memory in photopolymers and rare-earth ion-doped glasses using two-photon absorption

포토폴리머와 희토류이온이 첨가된 유리에서의 이광자흡수를 이용한 광정보저장

  • Lee, Myeong-Kyu (Department of Materials Science and Engineering, Yonsei University) ;
  • Kim, Eun-Kyoung (Department of Chemical Engineering, Yonsei University) ;
  • Trinh Minh-Tuan (Department of Physics, Chungbuk National University) ;
  • Lim, Ki-Soo (Department of Physics, Chungbuk National University)
  • 이명규 (연세대학교 신소재공학부) ;
  • 김은경 (연세대학교 화학공학부) ;
  • ;
  • 임기수 (충북대학교 물리학과)
  • Published : 2006.02.01
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Abstract

We studied feasibility of three-dimensional optical memory by utilizing femtosecond laser-induced changes of transmission in photopolymers and photoluminescence in Eu and Sm ion doped sodium borate glasses. We produced transmission change by two photon absorption and obtained sub-Um size spots in photopolymers using 780 nm modelocked Ti-sapphire laser pulses. We also changed valence state of Eu and Sm ions by multi-photon absorption and achieved $\~{\mu}m$ sized spot formation in Sm-doped glasses.

펨토초 레이저 펄스에 의한 포토폴리머의 투과율 변화와 Eu 이온과 Sm 이온이 첨가된 sodium borate 유리의 형광파장의 변화를 이용하여 3차원 광메모리 가능성을 연구하였다. 780 nm의 모드잠금 타이사파이어 레이저를 이용하여 이광자흡수에 의해 DuPont 포토폴리머에서는 투과율을 변화시켰으며 이로 인해 $0.6{\mu}m$ 크기의 비트를 형성하였다. Sm 이온이 첨가된 재료에서는 이광자흡수로 인한 Sm 이온의 광환원을 이용하여 $4{\mu}m$ 크기의 형광 비트를 얻을 수 있었고 다층구조에서의 비트 형성을 시도하였다.

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References

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