کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1493681 | 1510787 | 2015 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Holographic gratings recorded in poly(lactic acid)/azo-dye films Holographic gratings recorded in poly(lactic acid)/azo-dye films](/preview/png/1493681.png)
• Diffraction gratings recorded in mostly biodegradable PLA/DO3 material.
• Diffraction efficiency can be improved by introducing MWCNTs.
• All-optical pre-treatment applied to both materials to improve diffraction efficiency.
Diffraction gratings were recorded in biodegradable polymer films of poly(lactic acid) doped with the photoisomerisable azo-dye (Disperse Orange 3). It is shown that the diffraction efficiency of the recorded grating can be improved by 220% via an all-optical treatment. This all-optical treatment consists of a pre-irradiation of the sample with the writing laser beam at high power during a short period of time, preventing damage of the material, followed by a much longer inscription at relatively low power. Furthermore, it is shown that the addition of a small amount of 0.05 wt% of multi-walled carbon nanotubes to the photoresponsive polymer increases the maximum diffraction efficiency as well as the remanent efficiency by 20%. Finally, this last photoresponsive nano-composite is also sensitive to the pre-irradiation treatment.
Journal: Optical Materials - Volume 47, September 2015, Pages 72–77