Related Experiment Video
Updated: May 10, 2026
13:44
Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
Published on: December 27, 2012
Broadband terahertz wave deflection based on C-shape complex metamaterials with phase discontinuities
Xueqian Zhang1, Zhen Tian, Weisheng Yue
1Center for Terahertz Waves and College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, People's Republic of China.
Advanced Materials (Deerfield Beach, Fla.)
|June 22, 2013
Summary
This study introduces a metasurface terahertz wave deflector that steers broadband terahertz waves across a wide range of frequencies and angles. This novel deflector enables the development of a Fresnel zone plate for focusing terahertz radiation.
Area of Science:
- Optics and Photonics
- Metamaterials
- Terahertz Technology
Background:
- Metasurfaces offer precise control over electromagnetic waves.
- Broadband terahertz (THz) wave manipulation is crucial for advanced applications.
- Phase discontinuities are key to designing novel optical components.
Purpose of the Study:
- To report a broadband terahertz wave deflector utilizing metasurface-induced phase discontinuities.
- To demonstrate the deflection of various frequency components of THz radiation.
- To develop a Fresnel zone plate for focusing broadband THz radiation.
Main Methods:
- Design and fabrication of a metasurface.
- Characterization of beam deflection for frequencies from 0.43 to 1.0 THz.
- Integration of the deflector into a Fresnel zone plate configuration.
Main Results:
- The metasurface deflector successfully steered broadband terahertz waves (0.43–1.0 THz).
- Deflection angles ranged broadly from 25° to 84° for orthogonal polarizations.
- A functional Fresnel zone plate was developed, capable of focusing broadband terahertz radiation.
Conclusions:
- Metasurface-induced phase discontinuities provide an effective method for broadband terahertz wave deflection.
- The developed beam deflector is a key component for advanced THz optical systems.
- This work paves the way for novel terahertz focusing and imaging applications.
Related Concept Videos
02:18Interference and Diffraction
Interference is a characteristic phenomenon exhibited by waves. When two electromagnetic waves interact with their peaks and troughs coinciding, a resulting wave with enhanced amplitude is produced. This is known as constructive interference. In this case, the two waves interacting are in phase with each other.
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.
01:18Clipper Circuit
A clipper circuit is a fundamental wave-shaping device that harnesses the unique properties of diodes to alter and control waveform characteristics. This technology is widely used in electronic devices, especially in television and radar communication systems, where it enhances waveform modulation in both transmitters and receivers.
The operation of a clipper circuit can be exemplified by analyzing a dual-clipper configuration setup that integrates two ideal diodes, each paired with a biasing...
The operation of a clipper circuit can be exemplified by analyzing a dual-clipper configuration setup that integrates two ideal diodes, each paired with a biasing...
01:10Interference: Path Lengths
Consider two sources of sound, that may or may not be in phase, emitting waves at a single frequency, and consider the frequencies to be the same.
Two special sources may be considered when they are in phase. This can be easily achieved by feeding the two sources from the same source. An example would be synchronizing the two speakers by feeding them with the same source, such as the sound waves produced by a tuning fork. This setup ensures that the two sources have the same frequency and are...
Two special sources may be considered when they are in phase. This can be easily achieved by feeding the two sources from the same source. An example would be synchronizing the two speakers by feeding them with the same source, such as the sound waves produced by a tuning fork. This setup ensures that the two sources have the same frequency and are...