异常传输和安德森定位用于在深次波长尺度上的交替传播和 evanescent 波
Changlin Sun1,2, Haiyi Liu1, Pengfei Qi1
1Institute of Modern Optics, Nankai University, Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology, Tianjin 300350, China. qipengfei@nankai.edu.cn.
Nanoscale
|July 12, 2023
概括
在深度亚波长介电多层中,有效介质理论 (EMT) 的分解被重新审视. 以前与安德森定位相关的异常传输,即使在有序的系统中也会发生,需要纠正的EMT进行准确的分析.
科学领域:
- 波浪物理学的波浪物理.
- 凝聚物质物理学 凝聚物质物理学
- 材料科学是一种材料科学.
背景情况:
- 深度亚波长结构通常遵循波传输的有效介质理论 (EMT).
- 最近的研究表明,在介电多层中,EMT在总反射 (TR) 角度附近的分解.
- 在无序系统中观察到超出TR角度的异常传输,归因于安德森定位.
研究的目的:
- 调查在深次波长多层中异常传输的基础物理.
- 为了澄清安德森本地化和有效媒介理论分解的作用.
- 为了确定这些系统中EMT的有效性和必要的纠正.
主要方法:
- 系统地调查发生角度依赖的反射率和模式.
- 对有序和无序的深潜波长多层系统进行分析.
- 实验观测与理论模型的比较,包括纠正的EMT.
主要成果:
- 证明异常传输发生在无障碍的深次波长多层中,这挑战了以前仅仅归因于安德森定位的说法.
- 有效介质理论在很大程度上仍然有效,简单的纠正充分解释了观察到的异常传播.
- 无序系统表现出更容易获得的异常传输,并且由于安德森定位效应,需要进行允许性校正.
结论:
- 在深度亚波长多层中异常传输的现象不仅仅与安德森定位有关.
- 一个正确的有效介质理论为理解这些系统中的波传输提供了一个强大的框架.
- 结果提供了洞察波浪传输现象,可以扩展到声波和物质波浪系统.
相关概念视频
Propagation of Waves
2.4K
When a wave propagates from one medium to another, part of it may get reflected in the first medium, and part of it may get transmitted to the second medium. In such a case, the interface of the two mediums can be considered as a boundary that is neither fixed nor free.
Consider a scenario where a wave propagates from a string of low linear mass density to a string of high linear mass density. In such a case, the reflected wave is out of phase with respect to the incident wave, however the...
Consider a scenario where a wave propagates from a string of low linear mass density to a string of high linear mass density. In such a case, the reflected wave is out of phase with respect to the incident wave, however the...
2.4K
Propagation Speed of Electromagnetic Waves
3.4K
Electromagnetic waves are consistent with Ampere's law. Assuming there is no conduction current Ampere's law is given as:
3.4K
Standing Electromagnetic Waves
1.6K
Electromagnetic waves can be reflected; the surface of a conductor or a dielectric can act as a reflector. As electric and magnetic fields obey the superposition principle, so do electromagnetic waves. The superposition of an incident wave and a reflected electromagnetic wave produces a standing wave analogous to the standing waves created on a stretched string.
Suppose a sheet of a perfect conductor is placed in the yz-plane, and a linearly polarized electromagnetic wave traveling in the...
Suppose a sheet of a perfect conductor is placed in the yz-plane, and a linearly polarized electromagnetic wave traveling in the...
1.6K
Traveling Waves: Lossless Lines
161
The provided content explores the behavior of traveling waves on single-phase lossless transmission lines. It begins with a single-phase two-wire lossless transmission line of length Δx, characterized by a loop inductance LH/m and a line-to-line capacitance C F/m. These parameters result in a series inductance LΔx and a shunt capacitance CΔx.
161
Standing Waves in a Cavity
962
A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
962
Electromagnetic Waves in Matter
3.0K
Electromagnetic waves can travel in the vacuum as well as in matter. For example light, which is an electromagnetic wave, can travel through air, water, or glass.
Consider the electromagnetic wave passing through a dielectric medium. In such a case, Maxwell's equations get modified. In Ampere's law, ε0 , the dielectric permittivity of free space is replaced with ε, the permittivity of dielectric. Also, the vacuum permeability μ0 is replaced by the permeability of the...
Consider the electromagnetic wave passing through a dielectric medium. In such a case, Maxwell's equations get modified. In Ampere's law, ε0 , the dielectric permittivity of free space is replaced with ε, the permittivity of dielectric. Also, the vacuum permeability μ0 is replaced by the permeability of the...
3.0K


