Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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The optical properties of ZnS/$Na_3AlF_6$/ZnS/Cr multi-layered thin film with different optical thickness

ZnS/$Na_3AlF_6$/ZnS/Cr 다층 박막의 광학적 두께 변화에 따른 광특성

  • Kim, Jun-Sik (Department of Materials Engineering, Chungbuk National University) ;
  • Jang, Gang-Jae (Department of Materials Engineering, Chungbuk National University) ;
  • Jang, Gun-Eik (Department of Materials Engineering, Chungbuk National University)
  • 김준식 (충북대학교 신소재공학과) ;
  • 장강재 (충북대학교 신소재공학과) ;
  • 장건익 (충북대학교 신소재공학과)
  • Published : 2008.06.19
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Abstract

Multi-layered thin films of ZnS/$Na_3AlF_6$/ZnS/Cr were deposited on glass substrate by evaporation process. ZnS and $Na_3AlF_6$ were selected as high and low refractive index material, and additionally Cr was chosen as mid reflective layer respectively. The multi-layered thin films were prepared in terms of different optical thickness and different staking sequence and layers. The optical properties were systematically characterized with different optical thickness of $Na_3AlF_6$ especially $0.25\lambda$ and $0.5\lambda$. In order to expect the experimental result, the simulation program, the Essential Macleod Program(EMP) was adopted. Based on the results taken by spectrophotometer at viewing angle $45^{\circ}$, the ZnS/$Na_3AlF_6$/ZnS/Cr multi-layered thin film shows purple colour range in $0.25\lambda$， bluish green in $0.5\lambda$, red purple in $0.75\lambda$, and purple in $1.0\lambda$ respectively.

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