作者
Oksana Ostroverkhova, Meng He, Robert J Twieg, WE Moerner
发表日期
2003/7/14
期刊
ChemPhysChem
卷号
4
期号
7
页码范围
732-744
出版商
WILEY‐VCH Verlag
简介
We present a detailed temperature‐dependence study of dielectric, birefringent, conductive, and photorefractive (PR) properties of high‐performance low‐molecular weight organic glasses that contain 2‐dicyanomethylene‐3‐cyano‐2,5‐dihydrofuran (DCDHF) derivatives. DCDHF organic glasses sensitized with C60 exhibit high two‐beam coupling gain coefficients in the red‐wavelength region. However, in the best performing DCDHF glasses at room temperature the PR dynamics are limited by slow molecular reorientation in the electric field. While orientational and, therefore, PR speed can be significantly improved by increasing the temperature above the glass‐transition temperature of the material, the steady‐state performance may worsen. Comprehensive study of the temperature dependence of various processes, which contribute to the PR effect in DCDHF glasses, clarifies the limiting factors and allows for …
引用总数
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