Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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Diffraction Efficiency Improvement of PVA/AA/SeO2 Photopolymer with Various Film Thickness and Eosin Y Contents

PVA/AA/SeO2 광고분자 필름의 두께 및 Eosin Y 함량 변화에 따른 회절효율 향상에 관한 연구

  • Her, Ki-Young (Polymer materials Laboratory, Department of Chemical Engineering, Kwangwoon University) ;
  • Jang, Hwan-Ho (Polymer materials Laboratory, Department of Chemical Engineering, Kwangwoon University) ;
  • Kim, Dae-Heum (Polymer materials Laboratory, Department of Chemical Engineering, Kwangwoon University)
  • 허기영 (광운대학교 화학공학과 고분자소재연구실) ;
  • 장환호 (광운대학교 화학공학과 고분자소재연구실) ;
  • 김대흠 (광운대학교 화학공학과 고분자소재연구실)
  • Published : 2009.08.25
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Abstract

Photopolymer is evaluated as better material than the others used for hologram storage, due to many advantages, such as high diffraction efficiency, easy processing, and self-developing. In this study, chalcogenide inorganic compound ($SeO_2$) which has optical activity, was added to polyvinyl alcohol/acrylamide photopolymer films. In order to optimize diffraction efficiency of these photopolymer films, we prepared the photopolymer films with various film thicknesses and Eosin Y content. Diffraction efficiency of the photopolymer films were measured using a 532 nm laser at $40^{\circ}$ incident angle. As a result, the phtopolymer film with Eosin Y content of 0.0045 g and thickness of $297{\mu}m$ showed the highest diffraction efficiency (78.70%).

광고분자 필름은 홀로그램을 저장하기 위한 기술로서, 광굴절 결정보다 고감도, 간단한 실시간 처리, 저렴한 가격 등의 장점으로 홀로그래픽 저장기술 응용에 보다 손쉽게 적용할 수 있다. 본 연구에서는 기존의 PVA/AA계 광고분자 필름에 광학적 활성을 가지는 $SeO_2$를 첨가한 광고분자 필름을 제조하였다. 홀로그램을 저장하기 위한 기록매질로서 최적의 회절효율을 가지는 광고분자 필름을 만들기 위하여, 광감각제인 Eosin Y의 농도와 광고분자 필름의 두께를 달리하여 실험하였다. 광고분자 필름의 회절효율은 532 nm 레이저로, $40^{\circ}$의 입사각에서 측정하였다. 실험 결과, Eosin Y의 농도가 0.0045 g이고, 필름 두께가 $297{\mu}m$일 때, 78.70%로 가장 높은 회절효율 값을 나타내었다.

Keywords

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