Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Design and Analysis of Optical Properties of Anti-reflection Coated ZnS Substrates in the Mid-infrared Region

중적외선 영역의 무반사 코팅된 ZnS 기판의 설계와 광학 특성

  • Park, Buem Keun (Advanced Materials Convergence R&D Division, Korea Institute of Ceramic Engineering & Technology) ;
  • Paik, Jong-Hoo (Advanced Materials Convergence R&D Division, Korea Institute of Ceramic Engineering & Technology)
  • 박범근 (한국세라믹기술원 소재융합고도화연구본부) ;
  • 백종후 (한국세라믹기술원 소재융합고도화연구본부)
  • Received : 2022.06.30
  • Accepted : 2022.07.25
  • Published : 2022.07.31
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Abstract

In this study, we fabricated ZnS substrates with excellent transmittance in the mid-infrared region (3-5 ㎛) using hot pressing instead of conventional chemical vapor deposition (CVD). Diamond-like carbon (DLC) was coated on either one or both sides of the ZnS substrates to improve their mechanical properties and transmittance efficiency. To reduce the reflectance and further improve transmittance in the mid-infrared region, anti-reflection (AR) coating was designed for DLC/ZnS /AR and AR/ ZnS /AR structures. The coating structure, microstructure, and optical properties of the AR-coated ZnS substrates were subsequently investigated by employing energy dispersive X-ray spectroscopy, scanning electron microscopy, and Fourier-transform infrared (FTIR) spectroscopy. The FTIR spectroscopy results demonstrated that, in the mid-infrared region, the average transmittance of the samples with AR coating on one and both sides increased by approximately 18% and 27%, respectively. Thus, AR coating improved the transmittance of the ZnS substrates.

Keywords

References

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