Related Experiment Video
Updated: Aug 4, 2026
12:18
Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
Published on: August 5, 2013
Propagation and localization of electromagnetic waves in quasiperiodic serial loop structures
H Aynaou1, E H El Boudouti, Y El Hassouani
1Laboratoire de Dynamique et d'Optique des Matériaux, Département de Physique, Faculté des Sciences, Université Mohamed Premier, 60000 Oujda, Morocco.
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|December 31, 2005
Summary
This study explores electromagnetic wave propagation in quasiperiodic photonic band gap structures. Researchers found unique localized modes and unusual dispersion, enabling fast or slow light, with experimental validation.
Area of Science:
- Condensed Matter Physics
- Photonics
- Materials Science
Background:
- Photonic band gap structures are crucial for controlling light propagation.
- Quasiperiodic structures offer unique optical properties compared to periodic ones.
- Understanding wave propagation in these complex systems is essential for advanced optical devices.
Purpose of the Study:
- To investigate electromagnetic wave propagation in 1D quasiperiodic photonic band gap structures.
- To analyze the impact of symmetric and asymmetric loop structures on wave transmission.
- To compare the behavior of Fibonacci structures with other quasiperiodic systems.
Main Methods:
- Numerical simulations of electromagnetic wave propagation.
- Analysis of transmission spectra, phase time, group velocity, and density of states.
- Investigation of symmetric and asymmetric loop configurations within quasiperiodic lattices.
Main Results:
- Symmetric loop structures behave as impedance-modulated mediums, exhibiting extended, forbidden, and defect modes.
- Asymmetric loop structures act as resonators, introducing additional transmission zeros and gaps.
- Unusual dispersion in stop bands leads to group velocities exceeding the speed of light in some cases.
- Fibonacci structures show distinct localized modes within band gaps compared to other quasiperiodic systems.
Conclusions:
- Quasiperiodic photonic band gap structures with loop elements offer tunable control over light propagation.
- The design of loop structures (symmetric vs. asymmetric) significantly influences transmission characteristics and band gap properties.
- Observed phenomena like fast/slow light and defect modes hold potential for novel photonic applications.
More Related Videos
Related Concept Videos
01:07Propagation of Waves
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...
01:30Electromagnetic Waves
James Clerk Maxwell formulated a single theory combining all the electric and magnetic effects scientists knew during that time, calling the phenomena his theory predicted “Electromagnetic waves”. He brought together all the work that had been done by brilliant physicists such as Oersted, Coulomb, Gauss, and Faraday and added his own insights to develop the overarching theory of electromagnetism. Maxwell’s equations, combined with the Lorentz force law, encompass all the laws of electricity and...
01:10Generating Electromagnetic Radiations
The German physicist Heinrich Hertz (1857–1894) was the first to generate and detect certain types of electromagnetic waves in the laboratory. Starting in 1887, he performed a series of experiments that confirmed the existence of electromagnetic waves and verified that they travel at the speed of light. Hertz used an alternating-current RLC (resistor-inductor-capacitor) circuit that resonated at a known frequency and connected it to a loop of wire. High voltages induced across the gap in the...
01:30Propagation Speed of Electromagnetic Waves
Electromagnetic waves are consistent with Ampere's law. Assuming there is no conduction current Ampere's law is given as:
01:28Standing Waves in a Cavity
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:
01:27Traveling Waves: Lossless Lines
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.