| Photodarkening in Amorphous As2S3 Thin Films |
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| 作者姓名： | 刘启明 干福熹 |
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| 作者单位： | ShanghaiInstituteofOpticsandFineMechanics,ChineseAcademyofSciences,P.O.Box800－216,Shanghai201800 |
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| 摘 要： | The photodarkening effect in amorphous As2S3 films is studied.The optical absorption edge shifts to a lower energy after illumination ar the bandgap light of 514.5nm wavelength by an argon laser.The shift in well annealed films can be recovered by annealing at 180℃ for 1 h but in un-annealed films it is irreversible.In addition,it was found that the magnitude of photodarkening ΔE increased with the increase of illumination light intensity and illumination time.The reversibility of photodarkening in amorphous As2S3 films can be applied in optical memories.
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| 关 键 词： | 薄膜 非晶体As2S3 光感应现象 |
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