Related Experiment Video
Updated: Feb 15, 2026
07:39
Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
7.3K
Pass-band reconfigurable spoof surface plasmon polaritons
Hao Chi Zhang1,2, Pei Hang He1,2, Xinxin Gao3
1State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, People's Republic of China.
Summary
This study presents a novel tunable band-pass filter using reconfigurable spoof surface plasmon polaritons (SPPs). The filter
Area of Science:
- Electromagnetics
- Metamaterials
- Filter Design
Background:
- Traditional microstrip filters have limitations in field confinement and enhancement.
- Spoof surface plasmon polaritons (SPPs) offer superior field confinement and enhancement.
- Tunable filters are crucial for reconfigurable intelligent systems.
Purpose of the Study:
- To introduce a new scheme for constructing band-pass tunable filters.
- To enable tuning of cut-off frequencies using varactors and DC bias.
- To leverage spoof SPPs for enhanced filter performance.
Main Methods:
- Design of a reconfigurable spoof SPP band-pass filter.
- Integration of varactors and a DC bias feeding structure.
- Full-wave electromagnetic simulations for performance verification.
Main Results:
- Demonstrated efficient and reconfigurable band-pass filtering using spoof SPPs.
- Achieved tunable cut-off frequencies by adjusting DC bias on varactors.
- Verified superior field confinement and enhancement compared to traditional filters.
Conclusions:
- The proposed spoof SPP filter scheme offers significant advantages in performance.
- The tunable nature of the filter makes it suitable for advanced intelligent systems.
- This technology has potential for wide application in reconfigurable electronic systems.
Related Concept Videos
02:35Band Theory
17.3K
When two or more atoms come together to form a molecule, their atomic orbitals combine and molecular orbitals of distinct energies result. In a solid, there are a large number of atoms, and therefore a large number of atomic orbitals that may be combined into molecular orbitals. These groups of molecular orbitals are so closely placed together to form continuous regions of energies, known as the bands.
The energy difference between these bands is known as the band gap.
Conductor, Semiconductor,...
The energy difference between these bands is known as the band gap.
Conductor, Semiconductor,...
17.3K
01:12First Pass Effect
9.7K
Presystemic elimination, or the first-pass effect, is the metabolism of drugs that reduces their effective concentration at the site of action. Apart from the first-pass effect, the systemic bioavailability of the drug is also reduced by other factors, including incomplete absorption or chemical degradation of drugs.
Depending on the route of administration, drugs can be metabolized in the liver, intestine, lungs, and vasculature. Orally administered drugs are first absorbed through the...
Depending on the route of administration, drugs can be metabolized in the liver, intestine, lungs, and vasculature. Orally administered drugs are first absorbed through the...
9.7K
01:01Energy Bands in Solids
2.0K
Isolated atoms have discrete energy levels that are well described by the Bohr model. And, it quantifies the energy of an electron in a hydrogen atom as En. Higher quantum numbers 'n' yield less negative, closer electron energy levels.
Band Formation:
When atoms are brought close together, as in a solid, these discrete energy levels begin to split due to the overlap of electron orbitals from adjacent atoms. This split occurs because of the Pauli exclusion principle, which states...
Band Formation:
When atoms are brought close together, as in a solid, these discrete energy levels begin to split due to the overlap of electron orbitals from adjacent atoms. This split occurs because of the Pauli exclusion principle, which states...
2.0K
01:25Single-pass Transmembrane Proteins
6.8K
Integral membrane proteins are tightly associated with the cell membrane and play a crucial role in cell communication, signaling, adhesion, and transport of the molecules. Some integral membrane proteins are present only in the membrane monolayer. For example, the enzyme fatty acid amide hydrolase is present in the cytoplasmic side of the membrane monolayer. In contrast, another type of integral membrane protein, also known as a transmembrane protein, spans across the membrane. Transmembrane...
6.8K
01:23Factors Influencing Bioavailability: First-Pass Elimination
8.2K
When a drug is taken orally, it undergoes a journey starting from the gastrointestinal (GI) tract, passing through the portal vein, reaching the liver, and finally entering the systemic circulation. This process involves the absorption of the drug across the GI tract. The liver is the primary site for metabolizing the drug, with some metabolism also occurring in the gut wall. This journey significantly reduces the quantity of the drug that reaches the systemic circulation, a phenomenon known as...
8.2K
01:26Insertion of Single-pass Transmembrane Proteins in the RER
18.2K
Integral membrane proteins are proteins adhered to the lipid bilayer of a cell organelle or membrane. They can be of two types: transmembrane integral proteins that span the lipid bilayer and monotopic proteins that are attached to either side of the membrane but do not pass through it.
Integral transmembrane proteins possess transmembrane and extra membrane domains. The transmembrane domains are primarily made of 20-25 hydrophobic amino acids arranged in a helical secondary confirmation. These...
Integral transmembrane proteins possess transmembrane and extra membrane domains. The transmembrane domains are primarily made of 20-25 hydrophobic amino acids arranged in a helical secondary confirmation. These...
18.2K