排序方式: 共有21条查询结果,搜索用时 15 毫秒
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由于腔模与激子对压力的依赖关系不同,所以可以选择不同的压力使激子和光场处于不同的耦合状态,从而实现对耦合的调谐。利用这种办法,我们观测到了代表激子与光场强耦合作用的Rabi分裂。由于在我们现有样品结构中压力对激子本征行为的影响很小,与以前报道的温度、电场等调谐方式相比,这种调谐方法不仅可以有效地调谐半导体微腔内激子与腔模的耦合程度,而且能够保持激子的本征性质在整个调谐过程中基本不变。这有助于研究在强耦合过程中激子极化激元的本征性质。将实验结果与压力下激子与腔模耦合理论进行拟合,得出了正确的Rabi分裂值。 相似文献
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LUO Jing ZHENG HouZhi SHEN Chao ZHANG Hao ZHU Ke ZHU Hui LIU Jian LI GuiRong JI Yang & ZHAO JianHua State Key Laboratory for Superlattices Microstructures 《中国科学:物理学 力学 天文学(英文版)》2010,(5)
We report that,by linearly polarized pumping of different wavelengths,Kerr transients appear at zero magnetic field only in the case when GaMnAs samples are initialized at 3 K by first applying a 0.8 Tesla field and then returning to zero field.We find that,instead of magnetization precession,the near-band gap excitation induces a coherent out-of-plane turning of magnetization,which shows very long relaxation dynamics with no precession.When photon energy increases,the peak value of the Kerr transient incre... 相似文献
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CHEN WenWen LI TangSong HE Sha LIU DingBin WANG Zhuo ZHANG Wei & JIANG XingYu CAS Key Laboratory for Biological Effects of Nanomaterials Nanosafety National Center for Nanoscience Technology Beijing China Graduate Schoold of the Chinese Academy of Sciences Beijing China Key Laboratory of Microsystems Microstructures Manufacturing Ministry of Education Harbin Institute of Technology Harbin College of Bioengineering Chongqing Universit... 《中国科学B辑(英文版)》2011,(8)
Immunoassays are useful for many bioassays. Many new techniques and materials are introduced into the immunoassay to improve the efficiency. This paper reviews recent progress in the application of microfluidic systems and gold nanoparticles in immunoassay. The micro/nano technologies and materials can offer good sensitivity, fast detection, cost-effectiveness and easy signal readout. In particular, the miniaturization of microfluidics and colorimetric assays based on gold nanoparticles have dramatically im... 相似文献
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We study transmission properties in configurations composed of two single metal gratings with different thicknesses. Choosing the perfect electric conductor excludes the influence of intrinsic material dispersion on transmission behaviors; and as such, we aim to reveal the contribution of geometric dispersion to electromagnetic transmission. Transmission suppression line, instead of a transmission suppression point, is discovered, denoting the curve of the wavelength versus the interval or the lateral displacement between the two single gratings when the transmission suppression appears. A simplified model is proposed to comprehend the underlying physics of this special phenomenon. 相似文献
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团簇淀积纳米结构薄膜的计算机模拟 总被引:1,自引:0,他引:1
对团簇的淀积方式作了简介。着重对团簇的淀积过程进行了计算机模拟,从中得出了淀积的尺寸分布与团簇在衬底上的徙动长度有关,而团簇的聚合长大存在一临界尺寸。并给出低能Pb团簇在碳膜表面的徙动长度和聚合的临界尺寸。 相似文献
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YuZHANG MingMA NingGU LingXU KunJiCHEN 《中国化学快报》2004,15(8):1005-1008
A simple two-step method was developed to prepare silver nanoshells coated on silica paticles. The method involves two steps: concentration of reaction precursor (AgNO3) on particle surfaces and subsequent reduction by formaldehyde. The obtained composite particles were characterized by TEM, ED, and SEM-EDS measurements. The results show that the silver nanoshell is coated on silica particle surface in the form of a polycrystalline (cubic structure) layer with average thickness of 20 nm and weight percentage of 1.9%. 相似文献
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The spin relaxation time is long in organic semiconductors because of the weak spin-orbit and hyperfine interactions,leading to intensive study on spin transport in organic semiconductors.The rapid progress towards utilizing spin degree of freedom in organic electronic devices is occurring.While the spin injection,transport and detection in organic semiconductors are demonstrated,the fundamental physics of these phenomena remains unclear.This paper highlights recent progress that has been made,focusing primarily on present experimental work. 相似文献
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Synthesis of N~(11)-anchoring biotinylated artemisinin derivatives and their preliminary biological assessment
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PAN QiYu WANG ShaoZhong LU JinJian MENG LingHua & YAO ZhuJun Nanjing National Laboratory of Microstructures School of Chemistry Chemical Engineering Nanjing University Nanjing China Joint Laboratory of Green Chemistry 《中国科学:化学》2010,(1)
Unique endoperoxide moiety of artemisinin and its derivatives has been considered the functionality exhibiting highly potent antimalarial and anticancer activities.To investigate the mechanisms of their biological actions,development of suitable molecular probes including biotinylated derivatives is of extreme significance.The synthesis and preliminary biological assessment of four new biotinylated artemisinin derivatives have been reported in this work. 相似文献