Holographic assembly of semiconductor CdSe quantum dots in polymer for volume Bragg grating structures with diffraction efficiency near 100%
Holographic assembly of semiconductor CdSe quantum dots in polymer for volume Bragg grating structures with diffraction efficiency near 100%
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DOI：
10.1063/1.3276914
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发表时间：
2009-12-28
影响因子：
4
通讯作者：
Kawai, Tsuyoshi
中科院分区：
文献类型：
--
作者：
Liu, Xiangming;Tomita, Yasuo;Kawai, Tsuyoshi
我们报道了在50 μ m厚的光聚合物薄膜中分散的半导体CdSe量子点上制作厘米级透射布拉格光栅。这是通过在光聚合单体共混物中全息组装CdSe量子点来完成的。通过荧光显微镜和共焦拉曼成像证实了聚合物中CdSe量子点的周期性图案化。在绿色中，0.34vol%CdSe量子点的1 μ m间距的光栅的衍射效率接近100%，给出了高达5.1 × 10（-3）的折射率调制。
We report on the fabrication of centimeter-size transmission Bragg gratings in semiconductor CdSe quantum dots dispersed 50 mu m thick photopolymer films. This was done by holographic assembly of CdSe quantum dots in a photopolymerizable monomer blend. Periodic patterning of CdSe quantum dots in polymer was confirmed by a fluorescence microscope and confocal Raman imaging. The diffraction efficiency from the grating of 1 mu m spacing was near 100% in the green with 0.34 vol % CdSe quantum dots, giving the refractive index modulation as large as 5.1x10(-3).