Related Experiment Video
Updated: Feb 15, 2026
11:57
Fabricating Metamaterials Using the Fiber Drawing Method
Published on: October 18, 2012
14.4K
Broadband wave plates made by plasmonic metamaterials
Lin Chen1, Xianmin Ke2, Huijie Guo3
1Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, China. chen.lin@mail.hust.edu.cn.
Scientific Reports
|January 20, 2018
Summary
Researchers developed broadband wave-plates using fishbone structures to overcome narrow bandwidth limitations. This novel approach cancels dispersion, enabling efficient polarization control over a wide frequency range.
Area of Science:
- Metamaterials and Plasmonics
- Electromagnetics and Optics
Background:
- Metamaterial wave-plates often exhibit narrow bandwidth due to resonance-based designs and frequency dispersion.
- Existing designs struggle with significant frequency dispersion, limiting their operational bandwidth.
Purpose of the Study:
- To develop a general strategy for creating broadband wave-plates.
- To overcome the inherent limitations of narrow bandwidth in conventional metamaterial wave-plates.
- To demonstrate a method for achieving broadband polarization control.
Main Methods:
- Modulating the dispersion of spoof surface plasmon (SSP) modes in fishbone structures by altering structural parameters.
- Cascading two fishbone structures with distinct SSP mode propagation constants.
- Deriving a criterion for maintaining a constant cross-polarization phase difference over a wide frequency band.
Main Results:
- Demonstrated that SSP mode dispersion can be freely tuned via structural parameters.
- Established a cascading strategy to cancel out frequency dispersions between two fishbone structures.
- Designed, fabricated, and experimentally validated a microwave quarter-wave plate with broadband performance (7-9.2 GHz).
Conclusions:
- The proposed strategy enables the creation of broadband wave-plates by effectively managing frequency dispersion.
- The findings pave the way for dispersion-controlled, high-performance optical devices across various frequency domains.
- This work offers a new avenue for advanced polarization control in metamaterial applications.
Related Concept Videos
02:12The Wave Nature of Light
61.7K
The nature of light has been a subject of inquiry since antiquity. In the seventeenth century, Isaac Newton performed experiments with lenses and prisms and was able to demonstrate that white light consists of the individual colors of the rainbow combined together. Newton explained his optics findings in terms of a "corpuscular" view of light, in which light was composed of streams of extremely tiny particles traveling at high speeds according to Newton's laws of motion.
61.7K
01:10Wave Parameters
9.4K
The simplest mechanical waves are associated with simple harmonic motion and repeat themselves for several cycles. These simple harmonic waves can be modeled using a combination of sine and cosine functions. Consider a simplified surface water wave that moves across the water's surface. Unlike complex ocean waves, in surface water waves, water moves vertically, oscillating up and down, whereas the disturbance of the wave moves horizontally through the medium. If a seagull is floating on the...
9.4K
01:07Reflection of Waves
4.7K
When a wave travels from one medium to another, it gets reflected at the boundary of the second medium. A common example of this is when a person yells at a distance from a cliff and hears the echo of their voice. The sound waves (longitudinal waves) traveling in the air are reflected from the bounding cliff. Similarly, flipping one end of a string whose other end is tied to a wall causes a pulse (transverse wave) to travel through the string, which gets reflected upon reaching the wall. In...
4.7K
01:20Half wave rectifier
2.5K
A half-wave rectifier is a fundamental circuit in electronics, designed to convert alternating current (AC) voltage into a unidirectional voltage. It utilizes the simplest form of diode rectification, where the circuit comprises a single diode in series with a load resistor and an AC power source.
2.5K
01:22Full wave rectifier
2.9K
A full-wave rectifier is a device that converts alternating current (AC) to direct current (DC) and is more efficient than its half-wave counterpart. It typically includes a center-tapped transformer, two diodes, and a load resistor. The secondary winding of the transformer is divided to provide two equal voltages of opposite polarities, which is the pivotal element of full-wave rectification.
2.9K
01:23Brain Waves
4.3K
Brain waves are electrical signals generated by the neurons in the brain, which are regularly monitored to measure mental activities. Brain waves and their frequency ranges can be measured using an electroencephalogram or EEG. There are four main types of brain waves, each with distinct characteristics:
4.3K