What is complementary split ring resonator?
Split Ring Resonators (SRR) and Complementary Split Ring Resonators (CSRR) are widely used to simulate metamaterial elements. Such elements are arranged uniformly in a periodic configuration and behave as artificial materials with unusual properties.
How does split ring resonator work?
Split-ring resonators (SRRs) consist of two concentric metallic rings in a circular or square shape, etched on the dielectric substrate. They have splits or gaps at opposite ends. The splits are the structural inhomogeneities that help the SRRs support resonant wavelengths much greater than the diameter of the rings.
How does a ring resonator work?
In general a ring resonator consists of a looped optical waveguide and a coupling mechanism to access the loop. When the waves in the loop build up a round trip phase shift that equals an integer times 2π, the waves interfere constructively and the cavity is in resonance.
What is meant by ring resonator?
A ring resonator is a very useful device that acts as a high-Q filter for applications that require wavelength selectivity. This type of device has many resonances, and only these resonant wavelengths are coupled to the output waveguide.
What is SRR in antenna?
Split ring resonators (SRRs) consist of a pair of concentric metallic rings, etched on a dielectric substrate, with slits etched on opposite sides. SRRs can produce an effect of being electrically smaller when responding to an oscillating electromagnetic field.
Is split ring resonator a metamaterial?
Split-ring resonator (SRR) structures which can be designed to be very compact having dual band characteristics; is a metamaterial offering negative permeability in a time-varying H-field component of perpendicularly polarized wave incident on its surface (Pendry et al., 1999; Smith et al., 2004; Liu et al., 2007). Lee …
What is microstrip ring resonator?
The microstrip ring resonator is one of the most reliable methods to calculate the effective dielectric constant, dissipation, and dispersion effect of the circuits on a PCB.
Where is ring resonator are used?
Because of their advantages of low cost and easy fabrication, ring resonators are used in many applications such as filters, oscillators, mixers, baluns, hybrids, magic Ts, couplers, and antennas. In addition, they have been successfully used to measure the phase velocity and dispersion of a microstrip line.
What is resonator in optical fiber?
An optical resonator (or resonant optical cavity) is an arrangement of optical components which allows a beam of light to circulate in a closed path. Such resonators can be made in very different forms.
What are stable and unstable resonator?
Stable resonators are used for low power lasers while unstable resonators are used for high power lasers. In stable resonator these remains risk of breakage of the m irrors while it is reduced to unstable resonators. The mode volume is is small in stable resonators while it is large in unstable resonators.
What are metamaterials used for?
Metamaterials are artificially engineered materials designed to induce customized properties in a material that originally does not exist. The metamaterial structures are obtained by making significant changes in internal material structure through different techniques.
What is the role of optical resonator?
An optical resonator is needed to build up the light energy in the beam. The resonator is formed by placing a pair of mirrors facing each other so that light emitted along the line between the mirrors is reflected back and forth.
What are different types of optical resonator?
There are two basic types of optical resonator modes. These are: the standing wave resonator, and the travelling wave resonator. The travelling wave resonator is also referred to as the ring resonator.
What is unstable resonator?
Definition: optical resonators which are dynamically unstable with respect to transverse beam offsets.
Who invented metamaterial?
The theoretical properties of metamaterials were first described in the 1960s by Victor Veselago, who focused on the purely theoretical (at the time) concept of negative index materials. His concept became a reality in the turn of the century.
What are the different types of metamaterials?
Electromagnetic metamaterials can be divided into different classes, as follows:
- Negative refractive index.
- Single negative.
- Hyperbolic.
- Bandgap.
- Double positive medium.
- Bi-isotropic and bianisotropic.
- Chiral.
- FSS based.
What is the importance of resonant cavity?
Cavity resonators are widely used as the frequency determining element in microwave oscillators. Their resonant frequency can be tuned by moving one of the walls of the cavity in or out, changing its size.
What is the principle and role of optical resonator cavity?
The optical cavity or resonator is typically comprised of a mirror at each end of the elongated gain region (see Fig. 1). This resonator allows the beam to bounce back and forth or resonate between the mirrors, growing very rapidly as it does so.
Are metamaterials the future?
Metamaterials offer potential for exciting new technologies, as well as for existing devices to be made smaller, faster, and more efficient. This file type includes high resolution graphics and schematics when applicable.
What is metamaterial made of?
A metamaterial typically consists of a multitude of unit cells, i.e. multiple individual elements (sometimes referred to as “meta-atoms”) that each has a size much smaller than the wavelength that it interacts with.
What are properties of metamaterials?
Properties of metamaterials
Due to their peculiar optical capabilities (wavelength shorter than visible light), metamaterials can be invisible. So far there is nothing that is out of the ordinary, but the incredible thing is that they also have enough potential to make the substances with which they interact invisible.
What is Q factor of a cavity resonator?
Quality factor, Q of a resonator, is associated with the loss factor of the cavity resonator and is defined as: Q=2π * (Time average energy stored at a resonant frequency)/(Energy dissipated in one period of this frequency)
What are the applications of cavity resonators?
A cavity resonator can be used as a frequency sensor. It acts as an energy trap, because it will siphon off energy from a microwave when the microwave frequency hits the resonance frequency of the cavity resonator. This can be used to determine the frequency of the passing wave.
What are different types of optical resonators?