Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan.
Langmuir. 2012 Feb 7;28(5):2313-7. doi: 10.1021/la2042229. Epub 2012 Jan 23.
We present spontaneous emission control of a core-shell CdSe/ZnS nanoparticle array assembled with polymer ultrathin films consisting of polymer nanosheets on a silver grating substrate, which served as a unique and simple photonic cavity. The grating-coupled waveguide modes enabled 10(3) order luminescence enhancement and one-fourth spectral narrowing. The light emission from a CdSe/ZnS nanoparticle array can be controlled by tuning the film thickness of hybrid polymer nanoassemblies, which provides multiple emission performance with good tuning ability from red to green at low-power continuous wave laser excitation (∼μW).
我们展示了一种具有聚合物超薄膜的核壳型 CdSe/ZnS 纳米粒子阵列的自发辐射控制，该聚合物超薄膜由银光栅衬底上的聚合物纳米片组成，作为一种独特而简单的光子腔。光栅耦合波导模式使发光增强了 10(3)倍，光谱线宽缩小了四分之一。通过调整聚合物纳米组装体的薄膜厚度，可以控制 CdSe/ZnS 纳米粒子阵列的发光，在低功率连续波激光激发下（约 μW），提供了从红色到绿色的多种发射性能，具有良好的调谐能力。
