Diffraction efficiency increase by corona discharge in photoinduced surface-relief gratings on an azo polymer film.
Diffraction efficiency increase by corona discharge in photoinduced surface-relief gratings on an azo polymer film.
复制标题
偶氮聚合物薄膜上的光致表面浮雕光栅中的电晕放电提高了衍射效率。
DOI：
10.1364/ol.26.000004
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发表时间：
2001
期刊：
影响因子：
3.6
通讯作者：
S. Umegaki
中科院分区：
文献类型：
--
作者：
K. Munakata;K. Harada;H. Anji;M. Itoh;T. Yatagai;S. Umegaki
电晕放电显著提高了表面浮雕光栅的衍射效率。我们通过对偶氮聚合物薄膜进行表面调制，利用激光干涉条纹制备了这种SRG。在烘箱中通过电晕放电将电荷沉积在SRG上。在玻璃化转变温度以上的电晕放电前后测量的一阶衍射效率在用圆偏振光束写入的SRG中从~2%增加到~40%。用原子力显微镜测量的SRG的浮雕深度也从~130 nm增加到~450 nm。衍射效率的增加与写入偏振无关。
The diffraction efficiency of a surface-relief grating (SRG) was dramatically increased by corona discharge. We fabricated this SRG by applying surface modulation to azo polymer films, using laser interference fringes. The electric charge was deposited upon the SRG by a corona discharge in an oven. The first-order diffraction efficiency measured before and after corona discharge above the glass-transition temperature increased from ~2% to ~40% in a SRG written with a circularly polarized beam. The relief depth of the SRG as measured with an atomic-force microscope also increased, from ~130 nm to ~450 nm. The increase in diffraction efficiency was independent of the writing polarization.