Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Video

Updated: Nov 10, 2025

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms
08:48

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms

Published on: September 25, 2020

6.0K

All-optical spatial terahertz modulator with surface-textured and passivated silicon.

Yulian He, Yuansheng Wang, Mo Li

    Optics Express
    |April 6, 2021
    PubMed
    Summary

    We developed a microstructured silicon device for all-optical spatial terahertz modulators (STMs). This device enhances modulation efficiency at low light levels, improving terahertz technology applications.

    Related Concept Videos

    You might also read

    Related Articles

    Articles linked to this work by shared authors, journal, and citation graph.

    Sort by
    Same author

    Serum concentrations of antioxidant vitamins and carotenoids are low in individuals with a history of attempted suicide.

    Nutritional neuroscience·2007
    Same author

    Arsenic trioxide induces different gene expression profiles of genes related to growth and apoptosis in glioma cells dependent on the p53 status.

    Molecular biology reports·2007
    Same author

    Role of p38 mitogen-activated protein kinases in cardioprotection of morphine preconditioning.

    Chinese medical journal·2007
    Same author

    Rapamycin inhibits osteoblast proliferation and differentiation in MC3T3-E1 cells and primary mouse bone marrow stromal cells.

    Journal of cellular biochemistry·2007
    Same author

    [Studies on chemical constituents of Salsola collina].

    Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica·2007
    Same author

    Functional characterization of the Arabidopsis eukaryotic translation initiation factor 5A-2 that plays a crucial role in plant growth and development by regulating cell division, cell growth, and cell death.

    Plant physiology·2007

    Area of Science:

    • Optoelectronics
    • Terahertz Technology
    • Materials Science

    Background:

    • Terahertz (THz) technology offers unique capabilities but requires efficient modulators.
    • Existing silicon-based spatial terahertz modulators (STMs) face limitations in modulation efficiency, especially at low illumination densities.
    • Improving STM performance is crucial for practical THz applications.

    Purpose of the Study:

    • To enhance the modulation efficiency of silicon-based STMs at low illumination densities.
    • To develop a novel Si-TPA (truncated pyramidal array) structure for improved THz modulation.
    • To overcome the trade-off between resolution and modulation efficiency in STMs.

    Main Methods:

    • Microtexturing of silicon surfaces to create a truncated pyramidal array (TPA).

    More Related Videos

    Characterization of Anisotropic Leaky Mode Modulators for Holovideo
    09:36

    Characterization of Anisotropic Leaky Mode Modulators for Holovideo

    Published on: March 19, 2016

    8.1K
    Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
    09:33

    Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

    Published on: June 7, 2019

    6.5K

    Related Experiment Videos

    Last Updated: Nov 10, 2025

    Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms
    08:48

    Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms

    Published on: September 25, 2020

    6.0K
    Characterization of Anisotropic Leaky Mode Modulators for Holovideo
    09:36

    Characterization of Anisotropic Leaky Mode Modulators for Holovideo

    Published on: March 19, 2016

    8.1K
    Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
    09:33

    Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

    Published on: June 7, 2019

    6.5K
  • Passivation of the Si-TPA structure using SiO2 coatings.
  • Characterization of the device's optical and THz modulation properties.

    • Main Results:

    • The Si-TPA structure with SiO2 coatings significantly reduced light reflectance and expanded the active modulation area.
    • Photogenerated carrier lifetime was remarkably increased, leading to superior modulation efficiency compared to bare silicon, particularly at low irradiation power.
    • The mesa-like TPA structure suppressed lateral carrier diffusion, maintaining a resolution equivalent to bare silicon.

    Conclusions:

    • The novel Si-TPA based STM offers a significant improvement in modulation efficiency at low illumination densities.
    • This device provides a feasible approach to break the resolution-modulation efficiency trade-off in STMs.
    • The developed Si-TPA STM is highly desirable for realizing high-performance THz imagers.