排序方式: 共有38条查询结果,搜索用时 15 毫秒
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利用金刚石氮空位色心体系耦合于一个双边的光子晶体腔(该光子晶体腔与两个波导耦合)来制备Bell态、GHZ态和团簇态。当光子被探测和进行幺正操作后,就得到纠缠态。同时计算了该体系的保真度,发现在近似参数条件下,该模型可得到较好结果。 相似文献
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Some kinds of low-dimensional nanostructures can be formed by irradiation of
laser on the pure silicon sample and the SiGe alloy sample. This
paper has studied
the photoluminescence (PL) of the hole-net structure of silicon and the
porous structure of SiGe where the PL intensity at 706nm and 725nm
wavelength increases obviously. The effect of intensity-enhancing in the PL
peaks cannot be explained within the quantum confinement alone. A
mechanism for increasing PL emission in the above structures is proposed, in which the
trap states of the interface between SiO2 and nanocrystal play an
important role. 相似文献
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Pd/γ-Al2O3-TiO2催化剂上乙醇乙醛的催化氧化性能研究 总被引:1,自引:1,他引:0
采用混胶法和机械混合等方法制备了Pd质量分数为1%的Pd/γ-Al2O3-TiO2催化剂,并对其催化活性、影响条件进行了考察。结果说明,由混胶法制备的Pd/γ-Al2O3-TiO2催化剂对乙醇和乙醛的完全氧化表现出优异的催化性能,其活性明显高于单一载体催化剂Pd/TiO2和Pd/Al2O3,150℃时乙醇和乙醛的转化率分别达到98.9%和98.5%。在较宽温度范围内和高空速条件下表现出良好的稳定性。同时运用XRD、TEM和FT-IR等技术对催化剂进行了表征。结果表明,在Pd/γ-Al2O3-TiO2催化剂中Al2O3与TiO2之间存在着较强的相互作用,使γ-Al2O3-TiO2的比表面积和孔容积均调变到一个适中的数值,同时在催化剂表面Al2O3参与形成了有利于其催化活性的表面结构。 相似文献
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以单取代苯磺酰脲除草剂NK92825和NK94827为基础,将三氟甲基引入嘧啶环中,设计合成了17个新的4′-三氟甲基嘧啶苯磺酰脲化合物,产物结构均经1H NMR及元素分析确证.目标化合物经盆栽试验,结果表明,部分化合物有较好的除草活性. 相似文献
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Stimulated photoluminescence emission and trap states in Si/SiO2 interface formed by irradiation of laser 下载免费PDF全文
Stimulated photoluminescence (PL) emission has been observed from an oxide structure of silicon when optically excited by a radiation of 514nm laser. Sharp twin peaks at 694 and 692nm are dominated by stimulated emission, which can be demonstrated by its threshold behaviour and linear transition of emission intensity as a function of pump power. The oxide structure is formed by laser irradiation on silicon and its annealing treatment. A model for explaining the stimulated emission is proposed, in which the trap states of the interface between an oxide of silicon and porous nanocrystal play an important role. 相似文献
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