概括
我们展示了使用轨道角动量 (OAM) 的贝塞尔-高斯 (BG) 束产生可控制的极紫外线 (XUV) 旋高波. 这种方法可以有效地合成一秒钟的脉冲.
科学领域:
- 量子光学就是量子光学.
- 非线性光学是一种非线性光学.
- 在第二个科学时刻.
背景情况:
- 高波生成 (HHG) 是产生极端紫外线 (XUV) 光的关键过程.
- 控制HHG的空间形状对于高级应用至关重要.
- 轨道角动量 (OAM) 为光束塑造提供了独特的自由度.
研究的目的:
- 提出和研究一种用于在XUV区域产生状高波的新方法.
- 为了实现可控制的状高波的空间形状.
- 探索使用Bessel-Gaussian (BG) 束与HHG的OAM.
主要方法:
- 使用带有非零轨道角动量 (OAM) 的贝塞尔-高斯 (BG) 束.
- 分析HHG在气体介质中的强度概况和相匹配条件.
- 将生成的波与由拉盖尔-高斯 (LG) 束产生的波进行比较.
主要成果:
- 带有OAM的BG光束产生单环结构旋高波,与LG光束不同.
- 在离轴实现有利的相匹配条件,将单原子相与BG束的几何相相补偿.
- 相对于激光焦点,确定了一个最佳的气体介质位置 (1.5zred到2.0zred) 对于高效的生成.
结论:
- 具有可控制空间形状的旋高波可以有效地使用具有OAM的BG光束产生.
- 拟议的方法提供了一个优化生成环状旋高的一般规则.
- 这项工作促进了为未来应用量身定制的每秒旋脉冲的合成.
相关概念视频
Hybridization of Atomic Orbitals I
47.1K
The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
47.1K
Angular Momentum about an Arbitrary Axis
199
Imagine a rigid body with a mass denoted as 'm', which has its center of mass at point G and is rotating around an inertial reference frame. The angular momentum at an arbitrary point P can be calculated by taking the cross product of the position vector and linear momentum vector for each individual mass element.
The velocity of a mass element comprises its translational velocity and the relative velocity instigated by the body's rotation. Substituting the velocity equation into...
The velocity of a mass element comprises its translational velocity and the relative velocity instigated by the body's rotation. Substituting the velocity equation into...
199
Conservation of Angular Momentum: Application
10.9K
A system's total angular momentum remains constant if the net external torque acting on the system is zero. Examples of such systems include a freely spinning bicycle tire that slows over time due to torque arising from friction, or the slowing of Earth's rotation over millions of years due to frictional forces exerted on tidal deformations. However in the absence of a net external torque, the angular momentum remains conserved. The conservation of angular momentum principle requires a...
10.9K
Angular Momentum
214
Angular momentum characterizes an object's rotational motion and is defined as the moment of its linear momentum about a specified point O. When a particle moves along a curved path in the x-y plane, the scalar formulation calculates the magnitude of its angular momentum, utilizing the moment arm (d), representing the perpendicular distance from point O to the line of action of the linear momentum. Despite being scalar in formulation, angular momentum is inherently a vector quantity. Its...
214
Atomic Nuclei: Larmor Precession Frequency
1.4K
The earth's gravitational field produces a 'twisting force' perpendicular to the angular momentum of a spinning mass (such as a spinning top) that causes the mass to 'wobble' around the gravitational field axis in a phenomenon called precession. Similarly, the magnetic moment (μ) of a spinning nucleus precesses due to an external magnetic field directed along the z-axis. The precession of the magnetic moment vector about the magnetic field is called Larmor precession,...
1.4K
Angular Momentum: Single Particle
6.1K
Angular momentum is directed perpendicular to the plane of the rotation, and its magnitude depends on the choice of the origin. The perpendicular vector joining the linear momentum vector of an object to the origin is called the “lever arm.” If the lever arm and linear momentum are collinear, then the magnitude of the angular momentum is zero. Therefore, in this case, the object rotates about the origin such that it lies on the rim of the circumference defined by the lever arm...
6.1K


