Optical and Holographic Characteristic of As-S-Se Thin Films

被引：0
|
作者：
Petkov, K. [2 ]
Vlaeva, I. [1 ]
Tasseva, J. [2 ]
Yovcheva, T. [3 ]
Sainov, S. [1 ]
机构：
[1] Bulgarian Acad Sci, Cent Lab Opt Storages & Proc Informat, Bl 101,Acad G Bonchev Str, BU-1113 Sofia, Bulgaria
[2] Bulgarian Acad Sci, Cent Lab Photoproc, BU-1113 Sofia, Bulgaria
[3] Paisij Hilendarski Univ Plovdiv, Dept Expt Phys, BU-4000 Plovdiv, Bulgaria
来源：
7TH INTERNATIONAL CONFERENCE OF THE BALKAN PHYSICAL UNION VOLS 1 AND 2 | 2009年 / 1203卷
关键词：
Chalcogenide thin films; optical characteristic; holographic gratings; CHALCOGENIDE GLASSES;
D O I：
暂无
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The photo-induced changes in As-S-Se ternary glasses offer a possibility of using amorphous chalcogenide layers for high-density information storage, high-resolution display devices and fabrication of diffractive optical elements In this paper we report results of the photo-induced changes in the optical properties of optically uniform thin As40S60-xSex films The refractive index is determined with spectrophotometnc method in a wide spectral region. The influence of light on the dispersion parameters of thin chalcogemde films is demonstrated. The holographic properties of As40S30Se30 layers with different thickness are investigated applying a symmetrical two-beam scheme. A semiconductor laser (Lead Light Technology, Inc) generating at 532 nm is used as a light source The two beams are s-polarized The total intensity after spatial filtering and beam expanding was 10 mW/cm(2) The diffraction efficiency kinetics is monitored with a 1 5 mW semiconductor laser at 635 nm wavelength, operating at optimal reconstructed angle condition Two different gratings are recorded with grating steps 0 5 mu m and 1.5 mu m, respectively. Two film thicknesses - 0.3 mu m and 1.0 mu m are used for grating recording. The observed diffraction efficiency is not very high, but the signal - to - noise ratio is better than 200.1
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页码：650 / +
页数：3
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