Measurement of Thermal Diffusivity of Multilayer Optical Thin Film Systems Using Photoacoustic Effect.
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- Kwon Kyong Up
- Department of Physics, University of Ulsan, Ulsan 680-749, Korea
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- Choi Moon Ho
- Department of Physics, University of Ulsan, Ulsan 680-749, Korea
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- Kim Sok Won
- Department of Physics, University of Ulsan, Ulsan 680-749, Korea
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- Seong Dae Jin
- Temperature Group, Korea Research Institute of Standards and Science, Taejon 305-600, Korea
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- Kim Jong Chul
- Temperature Group, Korea Research Institute of Standards and Science, Taejon 305-600, Korea
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抄録
In other to develop ultrahigh-power laser systems, laser mirrors must be highly resistant to thermal shock and effectively cooled; therefore, the study of optical multilayer systems which have high thermal diffusivity has become important. In this study, we designed and developed two-layer antireflection (AR) optical coating samples and five-layer high-reflection (HR) optical coating samples on glass substrate under different evaporation conditions of coating speed (10, 20 Å/s) and substrate temperature (50, 100, 150, 200°C), using two dielectric materials MgF2 and ZnS which have different refractive indices, and the through-plane thermal diffusivity was measured using the photoacoustic effect. The thermal diffusivities of the samples were obtained from the measured photoacoustic signals by changing the modulation frequency of the Ar+ laser beam. The results indicated that the thermal diffusivity is maximum when the coating speed is 10 Å/s and substrate temperature is 150°C, and is closely related to the morphology of the films.
収録刊行物
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- Japanese Journal of Applied Physics
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Japanese Journal of Applied Physics 39 (1), 202-206, 2000
The Japan Society of Applied Physics
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詳細情報 詳細情報について
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- CRID
- 1390282681229288704
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- NII論文ID
- 110003956337
- 210000046987
- 130004526667
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- NII書誌ID
- AA10457675
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- ISSN
- 13474065
- 00214922
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- NDL書誌ID
- 4974916
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可