The equilibrium geometries of several Hn（n=4,5,6,7,9,13) clsters with certain symmetry have been optimized by the ab inito Murtaug-Sargent(MS) method.We find that the stability of a centered cluster depends on the ...The equilibrium geometries of several Hn（n=4,5,6,7,9,13) clsters with certain symmetry have been optimized by the ab inito Murtaug-Sargent(MS) method.We find that the stability of a centered cluster depends on the structure,the spin symmetry and the coordinate number,and the latter plays a more important role.展开更多
In this work.superradiation in found to play an important role to populate the metastable level 6s5d ^1 D2 from which 5dnd(J=4) autoionizing Rydberg series were excited through double-resonant laser driving.Experiment...In this work.superradiation in found to play an important role to populate the metastable level 6s5d ^1 D2 from which 5dnd(J=4) autoionizing Rydberg series were excited through double-resonant laser driving.Experimental results were analysed using 5-channel quantum defect treatment in which three autoionizing Rydberg series and two open channels were included.展开更多
We compute the electromagnetic transmission through one -dimensional photonic band gap (PBG) sturcture with defect layers by using transfter matrix method(TMM).Numerical results find that defect mode frequency is inde...We compute the electromagnetic transmission through one -dimensional photonic band gap (PBG) sturcture with defect layers by using transfter matrix method(TMM).Numerical results find that defect mode frequency is independent of the position of defect layer when there is only single defect layer in one-dimensional PBG structure,and that defect mode frequencies are dependnt of the location of defect layers when there are two defect layers,In addition,defect mode frequency is very sensitive to refractive index of defect layer medium.These phenomena may be useful in the design of optical devices and precise measurement of refractive index of dielectric.展开更多
From the analysis of infrared (IR) transmission spectrum, it was showed that the SiO x films were produced when polymethyl phenethyl silane (PMPES) was treated with O 2 plasma, where the x ranged from 1.5 ...From the analysis of infrared (IR) transmission spectrum, it was showed that the SiO x films were produced when polymethyl phenethyl silane (PMPES) was treated with O 2 plasma, where the x ranged from 1.5 to 2. This film has a positive flat band voltage on the curve of high frequency C V chart, its value is dependent on the condition of O 2 plasma treatment and the thickness of PMPES film.展开更多
A novel fiber optic liquid level sensor based on laser radar (ladar) is reported here. Using the perfect technique of ladar in which the phase of amplitude modulated light wave reflected from the liquid surface is com...A novel fiber optic liquid level sensor based on laser radar (ladar) is reported here. Using the perfect technique of ladar in which the phase of amplitude modulated light wave reflected from the liquid surface is compared with that of original modulation signal, the distance can be measured precisely. A special symmetric compensating coaxial optical system is proposed to eliminate many adverse effects. It realized the one-time electronic-free optical measurement on a simulated oil tank and achieves an accuracy of 0.3%, within a temperature range of -10 ℃～+40 ℃ over a measuring of 0～10 m.展开更多
文摘The equilibrium geometries of several Hn（n=4,5,6,7,9,13) clsters with certain symmetry have been optimized by the ab inito Murtaug-Sargent(MS) method.We find that the stability of a centered cluster depends on the structure,the spin symmetry and the coordinate number,and the latter plays a more important role.
文摘In this work.superradiation in found to play an important role to populate the metastable level 6s5d ^1 D2 from which 5dnd(J=4) autoionizing Rydberg series were excited through double-resonant laser driving.Experimental results were analysed using 5-channel quantum defect treatment in which three autoionizing Rydberg series and two open channels were included.
文摘We compute the electromagnetic transmission through one -dimensional photonic band gap (PBG) sturcture with defect layers by using transfter matrix method(TMM).Numerical results find that defect mode frequency is independent of the position of defect layer when there is only single defect layer in one-dimensional PBG structure,and that defect mode frequencies are dependnt of the location of defect layers when there are two defect layers,In addition,defect mode frequency is very sensitive to refractive index of defect layer medium.These phenomena may be useful in the design of optical devices and precise measurement of refractive index of dielectric.
文摘From the analysis of infrared (IR) transmission spectrum, it was showed that the SiO x films were produced when polymethyl phenethyl silane (PMPES) was treated with O 2 plasma, where the x ranged from 1.5 to 2. This film has a positive flat band voltage on the curve of high frequency C V chart, its value is dependent on the condition of O 2 plasma treatment and the thickness of PMPES film.
文摘A novel fiber optic liquid level sensor based on laser radar (ladar) is reported here. Using the perfect technique of ladar in which the phase of amplitude modulated light wave reflected from the liquid surface is compared with that of original modulation signal, the distance can be measured precisely. A special symmetric compensating coaxial optical system is proposed to eliminate many adverse effects. It realized the one-time electronic-free optical measurement on a simulated oil tank and achieves an accuracy of 0.3%, within a temperature range of -10 ℃～+40 ℃ over a measuring of 0～10 m.
