Related Experiment Video

Updated: Jan 29, 2026

Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
10:54

Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters

Published on: July 8, 2013

15.3K

Active multifunctional terahertz modulator based on plasmonic metasurface

Jie Ji, Siyan Zhou, Weijun Wang

    Optics Express
    |February 9, 2019
    PubMed
    Summary

    This study demonstrates an active terahertz modulator using plasmon-induced transparency (PIT) metasurfaces. Infrared light dynamically tunes the modulator

    More Related Videos

    Multifunctional Hybrid Fe2O3-Au Nanoparticles for Efficient Plasmonic Heating08:04

    Multifunctional Hybrid Fe2O3-Au Nanoparticles for Efficient Plasmonic Heating

    Published on: February 20, 2016

    14.2K
    Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces09:33

    Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

    Published on: June 7, 2019

    6.7K

    Related Concept Videos

    Acid–Base Equilibria: Activity-Based Definition of pH01:10

    Acid–Base Equilibria: Activity-Based Definition of pH

    For an ideal solution, the pH is defined as the negative logarithm of the hydrogen ion concentration. For a non-ideal solution, an accurate measurement of the pH must consider the negative logarithm of the hydrogen ion activity rather than concentration. In such a solution, the pH can be more accurately defined as the negative logarithm of a product of the hydrogen ion concentration and its activity coefficient.
    In solutions of very low ionic strength—for example, pure water—the...
    1.3K
    tRNA Activation02:26

    tRNA Activation

    Aminoacyl-tRNA synthetases are present in both eukaryotes and bacteria. Though eukaryotes have 20 different aminoacyl-tRNA synthetases to couple to 20 amino acids, many bacteria do not have genes for all of these aminoacyl-tRNA synthetases. Despite this, they still use all 20 amino acids to synthesize their proteins. For instance, some bacteria do not have the gene encoding the enzyme that couples glutamine with its partner tRNA. In these organisms, one enzyme adds glutamic acid to all of the...
    22.9K
    Co-activators and Co-repressors02:04

    Co-activators and Co-repressors

    Gene transcription is regulated by the synergistic action of several proteins that form a complex at a gene regulatory site. This is observed in eukaryotes, where the regulation of gene expression is a complex process. Regulatory proteins in eukaryotes can broadly be classified into two types – regulators that bind directly to specific DNA sequences and co-regulators that associate with regulatory proteins but cannot directly bind to the DNA. These co-regulators are further divided into...
    8.6K
    Activation Energy01:26

    Activation Energy

    Activation energy is the minimum amount of energy necessary for a chemical reaction to move forward. The higher the activation energy, the slower the rate of the reaction. However, adding heat to the reaction will increase the rate, since it causes molecules to move faster and increase the likelihood that molecules will collide. The collision and breaking of bonds represents the uphill phase of a reaction and generates the transition state. The transition state is an unstable high-energy state...
    86.6K
    Eukaryotic Transcription Activators02:42

    Eukaryotic Transcription Activators

    Transcription activators are proteins that promote the transcription of genes from DNA to RNA. In most cases, these proteins contain two separate domains ‒ a domain that binds to DNA and a domain for activating transcription; however, in some cases, a single domain is responsible for both binding and activation of transcription, as seen in the glucocorticoid receptor and MyoD.
    The binding domains are capable of recognizing and interacting with regulatory sequences on the DNA. These...
    12.8K
    Secondary Active Transport01:55

    Secondary Active Transport

    One example of how cells use the energy contained in electrochemical gradients is demonstrated by glucose transport into cells. The ion vital to this process is sodium (Na+), which is typically present in higher concentrations extracellularly than in the cytosol. Such a concentration difference is due, in part, to the action of an enzyme “pump” embedded in the cellular membrane that actively expels Na+ from a cell. Importantly, as this pump contributes to the high concentration of...
    137.7K