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Deposition Sciences Inc. - Difficult Coatings - LB - 8/23

THz Plasmonic Crystal is Tunable

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Normally the light passing through the atomic structure of a photonic crystal is of a fixed frequency, but light passing through a crystal containing plasma can be tuned by adjusting the voltage applied to it, say researchers in New Mexico. Photonic crystals are artificially constructed to allow light transmission of particular wavelengths. A plasmonic crystal has the ability to direct light like a photonic crystal but has a subwavelength size and could lead to smaller photonic crystals and tunable metamaterials. A team led by Sandia National Laboratory created a plasmonic crystal...Read full article

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    Published: October 2013
    Glossary
    bandgap
    In semiconductor physics, the term bandgap refers to the energy range in a material where no electronic states are allowed. It represents the energy difference between the valence band, which is the highest range of energy levels occupied by electrons in their ground state, and the conduction band, which is the lowest range of unoccupied energy levels. The bandgap is a crucial parameter in understanding the electrical behavior of semiconductors and insulators. Here are the key components...
    metamaterial
    Metamaterials are artificial materials engineered to have properties not found in naturally occurring substances. These materials are designed to manipulate electromagnetic waves in ways that are not possible with conventional materials. Metamaterials typically consist of structures or elements that are smaller than the wavelength of the waves they interact with. Key characteristics of metamaterials include: Negative refraction index: One of the most notable features of certain...
    terahertz
    Terahertz (THz) refers to a unit of frequency in the electromagnetic spectrum, denoting waves with frequencies between 0.1 and 10 terahertz. One terahertz is equivalent to one trillion hertz, or cycles per second. The terahertz frequency range falls between the microwave and infrared regions of the electromagnetic spectrum. Key points about terahertz include: Frequency range: The terahertz range spans from approximately 0.1 terahertz (100 gigahertz) to 10 terahertz. This corresponds to...
    AmericasbandgapcrystalsGreg Dyerlight transmissionMaterials & ChemicalsmetamaterialNature PhotonicsOpticsphotonicplasma resonanceplasmonicResearch & TechnologySandiaTech PulseterahertzLasers

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