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自聚焦

一束 Gaussian 光射到 BK-7 光学玻璃,材料的折射率随强度变化。在光束正中心,折射率最大。从而产生折射率分布,抵消了衍射效应,最终产生聚焦,这就是自聚焦。这是一种高能激光系统中的重要设计。本案例演示了三维非线性光传播。

阶跃光纤弯曲

分析了一个弯曲到 3mm 半径的阶跃光纤,研究其传播模式和辐射损耗。模型显示如何找到功率平均模式半径,以及如何用来计算等效模式指数。

Nanorods

A Gaussian electromagnetic wave is incident on a dense array of very thin wires (or rods). The distance between the rods and, thus, the rod diameter is ...

Fabry-Perot Cavity

This is an example of a Fabry-Perot cavity, the simplest optical resonator structure. It is a classical problem in optics and photonics. Two methods are shown for computing the Q-factor. The losses in this model are purely via radiation away from the resonator.

高斯光束以 Brewster 角入射

这个模型演示在两个介质之间的界面上以 Brewster 角入射的高斯光束的偏振属性,模型显示了如何使用“电磁波,束包络”接口和用户定义的相明细。使用了匹配边界条件特征在边界上吸收指定倾角入射的波。

Drude-Lorentz 色散介质的瞬态建模

等离激元孔阵列在孔小于波长时仍然具有大透射率,这归因于表面等离激元的存在,它可以在孔中隧穿电磁能量,即使孔远小于波长。\n\n本模型可以作为教学案例,显示如何模拟分散介质中的全瞬态波方程,其中的极化可以表达为 Drude-Lorentz 谐振项的总和。每个 Drude-Lorentz ...

Defining a Mapped Dielectric Distribution of a Metamaterial Lens (Wave Optics)

In this example, the properties of an engineered metamaterial are modeled by a spatially varying dielectric distribution. Specifically, a convex lens ...

Fresnel Equations (Wave Optics)

A plane electromagnetic wave propagating through free space is incident at an angle upon an infinite dielectric medium. This model computes the reflection and transmission coefficients and compares the results to the Fresnel equations.

Modeling of Negative Refractive Index Metamaterial (Wave Optics)

It is possible to engineer the structure of materials such that both the permittivity and permeability are negative. Such materials are realized by ...

Beam Splitter

A beam splitter is used to split a single beam of light into two. One way of making a splitter is to deposit a thin layer of metal between two glass ...