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如今,以微电子技术和器件为基础的电子设备,像计算机、通讯器材、电视机等,已深入人们日常生活和工作的各个领域,极大地推动了人类文明的发展。 相似文献
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制备了乙醇 二氧化硅三维胶质光子晶体,其晶格常数随着晶体高度的变化而变化.用皮秒 脉冲激光在不同高度激发光子晶体中乙醇产生Raman信号,得到了两个结果:1)即使Raman 信号的中心频率与光子晶体的带隙中心频率一致,在其禁带方向上测得的强度也没有被抑制 到与带隙深度同样的量级;2)尽管单纯的具有Raman信号频率的入射光的透过率随着高度的 变化而剧烈变化,但在光子晶体中产生的Raman信号强度却几乎不随高度的变化而变化,即 光子晶体的赝带隙几乎没有影响在禁带方向上测得的Raman信号强度.基于“光子晶体
关键词:
光子晶体
Raman散射
赝带隙
内部光源 相似文献
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Microtubule-associated proteins (MAPs) are important proteins in cells. They can regulate the organization, dynamics and function of microtubules. We measure the binding force between microtubule and a new plant MAP, i.e. AtMAP65-1, by dual-optical tweezers. The force is obtained to be 14.6 ± 3.5 pN from the data statistics and analysis. This force measurement is helpful to understand the function and mechanism of MAPs from the mechanical point of view and lays the groundwork for future measurements of the mechanical properties of other biological macro-molecules. 相似文献
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Fabrication of Colloidal Photonic Crystals with Heterostructure by Spin-Coating Method 总被引:1,自引:0,他引:1 下载免费PDF全文
Colloidal photonic crystal heterostructures, composed of two opaline photonic crystal films of silica spheres with different diameters, are fabricated by a two-step spin-coating method. Scanning electron microscopy (SEM) and UV-vis spectrophotometer are used to characterize the heterostructures. The SEM images show good ordering of the two-layer colloidal crystals constituting the heterostructures. The transmission spectra measured from the (111) plane in the heterostructure show that the composite colloidal photonic crystals have double photonic stop bands. Furthermore, when the sizes of the silica spheres used for fabricating the composite photonic crystal are slightly different, the transmission spectrum shows that the composite photonic crystals have more extended bandgap than that of the individual photonic crystals due to partial overlapping of its two photonic stop bands. 相似文献