Research on Injection-seeded β-BaB_2O_4 Optical Parameteric Oscillator

ＲｅｓｅａｒｃｈｏｎＩｎｊｅｃｔｉｏｎ┐ｓｅｅｄｅｄβ┐ＢａＢ２Ｏ４ＯｐｔｉｃａｌＰａｒａｍｅｔｅｒｉｃＯｓｃｉｌａｔｏｒＺＨＡＯＹｏｎｇｈｕａＨＥＨｕｉｊｉｕａｎＷＡＮＧＺｈｉｊｉａｎｇ（ＳｈａｎｇｈａｉＩｎｓｔｉｔｕｔｅｏｆＯｐｔｉｃｓａｎｄＦｉ...     

Characterization of Annealed, Proton Exchange Optical Waveguides in Y-cut MgO∶LiNbO_3 Crystal

1　Ｉｎｔｒｏｄｕｃｔｉｏｎ　　ＩｔｗａｓｓｈｏｗｎｔｈａｔＬｉＮｂＯ3ｄｏｐｅｄｗｉｔｈ5ｍｏｌ%ｏｒｍｏｒｅＭｇＯｉｓｃｈａｒａｃｔｅｒｉｚｅｄｂｙｈｉｇｈｄａｍａｇｅｔｈｒｅｓｈｏｌｄ[1]ｃｏｍｐａｒｅｄｗｉｔｈｕｎｄｏｐｅｄＬｉＮｂＯ3.ＭｇＯ∶ＬｉＮｂＯ3ｗａｖｅｇｕｉｄｅｃａｎｂｅｆａｂｒｉｃａｔｅｄｂｙｐｒｏｔｏｎｅｘｃｈａｎｇｅ[2],ｗｈｉｃｈｉｓｓｉｍｉｌａｒｔｏｔｈｅｍａｔｕｒｅａｎｎｅａｌｅｄｐｒｏｔｏｎｅｘｃｈａｎｇｅ(ＡＰＥ)ｔｅｃｈｎｏｌｏｇｙｏｆＬｉＮｂＯ3.Ｔｈｅｒｅｈａｓｂｅ…     

Internal Optical Parametric Oscillator with SBS Phase Conjugate Resonator

Ｂｅｃａｕｓｅｔｈｅｏｐｔｉｃａｌｐａｒａｍｅｔｒｉｃｏｓｃｉｌｌａｔｏｒ（ＯＰＯ）ｃａｎｂｅｇｅｎｅｒａｔｅｔｈｅｔｕｎａｂｌｅｌａｓｅｒｏｕｔｐｕｔ,ｉｔｐｌａｙｓａｎｉｍｐｏｒｔａｎｔｒｏｌｅｉｎｌａｓｅｒｔｅｃｈｎｏｌｏｇｙ［１～５］．ＩｔｉｓｗｅｌｌｋｎｏｗｎｔｈａｔｔｈｅｅｆｆｉｃｉｅｎｃｙｏｆＯＰＯｄｅｐｅｎｄｓｏｎｔｈｅｑｕａｌｉｔｙｏｆｔｈｅｐｕｍｐｉｎｇｌａｓｅｒｂｅａｍ．ＴｈｅｓｔｉｍｕｌａｔｅｄＢｒｉｌｌｏｕｉｎｓｃａｔｔｅｒｉｎｇ（ＳＢＳ）ｉｓａｎｉｍｐｏｒｔａｎｔｔｏ…     

A Novel OADM Based on Fiber Gratings

1　Ｉｎｔｒｏｄｕｃｔｉｏｎ　　Ｏｐｔｉｃａｌａｄｄ/ｄｒｏｐｍｕｌｔｉｐｌｅｘｅｒ (ＯＡＤＭ)ｉｓｔｈｅｋｅｙｃｏｍｐｏｎｅｎｔｏｆｏｐｔｉｃａｌｔｒａｎｓｐｏｒｔｎｅｔｗｏｒｋｓ(ＯＴＮ) .ＭａｎｙＯＡＤＭａｒｃｈｉｔｅｃｔｕｒｅｓｈａｖｅｂｅｅｎｒｅｐｏｒｔｅｄ ,ｓｕｃｈａｓｔｈｏｓｅｂａｓｅｄｏｎｗａｖｅｌｅｎｇｔｈｍｕｌｔｉｐｌｅｘｅｒｓ,ａｒｒａｙｅｄｗａｖｅｇｕｉｄｇｒａｔｉｎｇｓ(ＡＷＧ ) ,ａｃｏｕｓｔｏ ｏｐｔｉｃｔｕｎａｂｌｅｆｉｌｔｅｒｓ (ＡＯＴＦ) ,ｆｉｂｅｒＢｒａｇｇ ｇｒａｔｉ…     

Realizing 20 Gbits OTDM Transmission over 50km Truewave Fiber with Dispersion Compensation

Ｉｎｔｒｏｄｕｃｔｉｏｎ　　Ｔｈｅｒｅａｒｅｔｗｏｍｅｔｈｏｄｓｔｏｅｎｈａｎｃｅｔｈｅｃａｐａｃｉｔｙｏｆｔｈｅｔｒａｎｓｍｉｓｓｉｏｎｓｙｓｔｅｍ：ｏｐｔｉｃａｌｔｉｍｅｄｉｖｉｓｉｏｎｍｕｌｔｉｐｌｅｘｉｎｇ（ＯＴＤＭ）ａｎｄｏｐｔｉｃａｌｗａｖｅｌｅｎｇｔｈｄｉｖｉｓｉｏｎｍｕｌｔｉｐｌｅｘｉｎｇ（ＷＤＭ）．ＯＴＤＭｉｓｂｅｉｎｇｗｉｄｅｌｙｒｅｓｅａｒｃｈｅｄｂｅｃａｕｓｅｏｆｓｏｍｅｖｉｒｔｕｅｓｉｎｏｐｔｉｃａｌｎｅｔｗｏｒｋｓ［１～４］．ＯＴＤＭｗｉｔｈｔｈｅｓｉｎｇｌｅｃｈａｎ…     

Effect of gas pressure on ionization of ambient gas

1　ＩＮＴＲＯＤＵＣＴＩＯＮＩｔｗａｓｏｆｔｅｎｅｎｃｏｕｎｔｅｒｅｄｔｈａｔｉｏｎｉｚａｔｉｏｎｏｆａｍｂｉｅｎｔ ｇａｓｓｈｏｕｌｄｏｃｃｕｒｒｅｄｗｈｅｎａ ｐｌａｓｍａｗａｓｐｒｏｄｕｃｅｄｗｉｔｈｌａｓｅｒａｂｌａｔｉｎｇａｔａｒｇｅｔ .Ｍａｎｙａ     

Collision of Bare Ion Si~(14 ) with the Same Z Slow-atom Si

1　ＩＮＴＲＯＤＵＣＴＩＯＮＩｎｔｈｉｓｐａｐｅｒｗｅｄｉｓｃｕｓｓｔｈｅｃｏｌｌｉｓｉｏｎｏｆｂａｒｅｉｏｎＳｉ14 ｗｉｔｈｔｈｅｓａｍｅＺｓｌｏｗａｔｏｍＳｉ.Ｉｎｒｅｃｅｎｔｐｕｂｌｉｃａｔｉｏｎｂａｒｅｈｉｇｈ-Ｚｉｏｎｓｃｏｌｌｉｓｉｏｎｗｉｔ...     

Nonlinear elastic waves in a monatomic chain with nonlinear interaction

1　ＩＮＴＲＯＤＵＣＴＩＯＮＢｅｃａｕｓｅｓｏｍｅｉｍｐｏｒｔａｎｔ ｐｒｏｐｅｒｔｉｅｓｏｆｃｒｙｓｔａｌ(ｓｕｃｈａｓｓｐｅｃｉｆｉｃｈｅａｔａｔｈｉｇｈｔｅｍｐｅｒａｔｕｒｅ ,ｍｅｌｔｉｎｇ ,ｔｈｅｒｍａｌｅｘｐａｎｓｉｏｎ ,ｔｅｍｐｅｒａｔｕｒｅｄｅ     

Optical ac Stark Effect in ~(23)Na NMR Spectra

1.ＩＮＴＲＯＤＵＣＴＩＯＮＯｐｔｉｃａｌａｃＳｔａｒｋｅｆｆｅｃｔ(ａｌｓｏｓｉｍｐｌｙｃａｌｌｅｄａｓｌｉｇｈｔｓｈｉｆｔ),ａｓａｎｉｎｔｅｒｅｓｔｉｎｇｆｉｅｌｄｏｆｉｎｖｅｓｔｉｇａｔｉｏｎｆｏｒｔｅｓｔｉｎｇｔｈｅｆｕｎｄａｍｅｎｔａｌｔｈｅ?..     

CORRELATION EFFECTS ON THE GROUNDSTATES OF THREE-ELECTRON QUANTUM DOTS IN A STRONG MAGNETIC FIELD

１ＩＮＴＲＯＤＵＣＴＩＯＮＩｎｒｅｃｅｎｔｙｅａｒｓｔｈｅｒｅｈａｓｂｅｅｎｍｕｃｈｅｘｐｅｒｉｍｅｎｔａｌａｎｄｔｈｅｏｒｅｔｉｃａｌｉｎｔｅｒｅｓｔｉｎｑｕａｎｔｕｍｄｏｔｓｉｎｗｈｉｃｈｏｎｌｙａｆｅｗｅｌｅｃｔｒｏｎｓａｒｅｂｏｕｎｄａｔｓｅ...     

Specific features of the structure of detonation nanodiamonds from results of electron microscopy investigations

The experimental results of a comprehensive investigation of the structure of detonation synthesis nanodiamonds by electron microscopy methods have been presented. The morphology of diamond nanoparticles has been investigated and the microdiffraction patterns have been analyzed. The method of characteristic fast electron energy loss spectroscopy in transmission electron microscopy has been used. The local density of structural components of a nanodiamond (diamond core and fullerene-like shell) has been obtained. The shape of the shell surrounding the nanocrystal has been determined using model calculations. A hypothesis explaining the charging of the nanodiamond surface has been proposed.     

稀土和锕系化合物中重费密子行为

本文采用周期Anderson哈密顿量研究了稀土和锕系化合物中的重费密子行为。对f电子间库仑关联项做了平均场近似并引入自能项反映多体作用的效应。对自能项采用了单格位近似,在准粒子表象中讨论了系统的性质,通过对f电子平均占据数的自洽计算,得到了准粒子有效质量,讨论了形成重费密子的条件,以及相应的磁性的变化,并做了数值计算。所得结果与最近的实验进行了比较。 关键词：     

Extremely short optical pulses in strained graphene in terms of the gauge theory

Evolution of optical pulses, which propagate in strained graphene, has been investigated. The effective wave equation for the vector potential of the electromagnetic field has been derived. The tensile strain of graphene layers has been described using the effective vector-potential in terms of the gauge theory. The numerical solution of the derived wave equation has been presented and the dependence of the pulse strength and shape on the magnitude of the external strain has been analyzed.     

Current-induced spin polarization of holes in tellurium

The current-induced optical activity in a tellurium single crystal has been experimentally investigated in the mid-infrared spectral region. The phenomenological theory of the current-induced optical activity has been considered and the microscopic mechanism of this phenomenon has been described. The dependence of the degree of spin polarization of holes in tellurium on the electric current density has been determined. An approximate analytical expression relating the current-induced optical activity to the degree of spin polarization of holes has been obtained.     

Surfatron acceleration in electromagnetic waves with a low phase velocity

The possibility of unlimited surfatron acceleration of nonrelativistic charged particles by slow electromagnetic waves has been revealed. The capture into such an acceleration regime has been described. The region of the parameters in which the effect of the capture and acceleration exists has been considered. The contribution of this mechanism to an increase in the energy of charged particles in the Earth’s magnetosphere has been estimated.     

2,2-二甲基丁酸的质谱鉴定

采用所相色谱－质谱联用法（ＧＣ－ＭＳ）首次分离鉴定了新合成的２,２－二甲基丁酸合成液,共分离出６个组分,经质谱裂解机理研究,鉴定出里面确含２,２－二甲基丁酸。并对２,２－二甲基丁酸、２,３－二甲基丁酸３,３－二甲基丁酸等结构异构体质 碎裂机理进行了比较。     

Zitterbewegung in thin-film topological insulators in the presence of a terahertz pulse

Zitterbewegung (trembling motion) in thin-film topological insulators in the presence of a terahertz pump pulse has been considered. An analytical expression for the electric current density has been derived, which describes the electric current induced by the motion of an electron wave packet. The electron subsystem has been considered in the long-wavelength approximation, and the electromagnetic field has been described classically in the constant-pump approximation. The numerical analysis of the results has been carried out.     

Study of the interaction of a palladium nanocontact with a hydrogen molecule

The interaction of a palladium nanocontact with a hydrogen molecule has been studied using molecular static method. The influence of impurity on the atomic structure and mechanical properties of the palladium nanocontact has been demonstrated. The characteristic interatomic distance has been determined in this contact. It has been found that the hydrogen molecule dissociates by interaction with nanocontact atoms.     

Thermoluminescence of x-irradiated CaSO4:Dy phosphors and role of Na2SO4 as a charge compensator

The thermoluminescence of x-irradiated CaSO₄: Dy phosphors has been studied for diverse activator concentrations. The concentration-dependence of these phosphors on the increase of glow peak intensities has been found to be remarkable. For higher concentration of dysprosium the concentration quenching effect has been observed. This has been attributed to the resonant transfer of energy from one activator atom to another, bringing the possible migration of energy in a solid, which is likely to get dissipated without luminescence, at the quenching site itself. The effect of irradiation time on the glow peak intensities reveals the initial linearity and a subsequent decrease indicating the possible radiation damage. The role of Na₂SO₄ as a charge compensator has been studied in detail. An attempt has been made to unravel the type of kinetics involved in the process, by calculating the activation energies by different methods. It has been concluded that the type of kinetics involved in the process is bimolecular.     

Viscosity and electric properties of water aerosols

The flow of water mist in a narrow duct has been studied experimentally. The profile of the velocity of drops has been measured, and the viscosity of the mist has been calculated using the Navier–Stokes equation. It has been found that at low gradients of the rate of shear the viscosity of the mist can exceed that of clean air by tens and even hundreds of times. The electric charge of the drops has been measured. It has been found that the viscosity of the mist differs from that of clean air at gradients of the rate of shear that are less than the frequency of the establishment of electric equilibrium between the drops. A comparative analysis of the viscosities of the mist and a drop cluster has been carried out, and the dependence of the viscosity of the water aerosol on the radius and the charge of the drops has been predicted. The possible role of aerosols that contain submicron drops in the known “clear air turbulence” problem has been shown.