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Related Concept Videos

Design Example: Resistive Touchscreen01:14

Design Example: Resistive Touchscreen

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A device engineer plays a crucial role in designing user interfaces for mobile devices. One such interface is the resistive touchscreen, which fundamentally consists of two metallic layers: a flexible upper layer and a rigid lower layer, separated by a narrow gap. The high resistance between these two layers is a key characteristic of this design.
When a user touches the screen, the two layers make contact at a specific point known as the touchpoint. This contact reduces the resistance between...
403

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Updated: Aug 26, 2025

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
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Electrically addressable integrated intelligent terahertz metasurface.

Benwen Chen1, Xinru Wang2, Weili Li1

  • 1Research Institute of Superconductor Electronics (RISE), School of Electronic Science and Engineering, Nanjing University, Nanjing 210023, China.

Science Advances
|October 12, 2022
PubMed
Summary
This summary is machine-generated.

Researchers developed a self-adaptive metasurface (SAM) for terahertz (THz) communication. This integrated device enables intelligent THz wave manipulation, overcoming limitations in tunable phase shifters and sensors for advanced applications.

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Area of Science:

  • Electromagnetics and wave propagation
  • Metamaterials and metasurfaces
  • Terahertz (THz) technology

Background:

  • Reconfigurable intelligent surfaces (RISs) are crucial for next-generation communication, uncrewed vehicles, and vital sign recognition.
  • Terahertz (THz) RIS development is hindered by the lack of tunable phase shifters and cost-effective sensors.

Purpose of the Study:

  • To develop an integrated self-adaptive metasurface (SAM) with THz wave detection and modulation capabilities.
  • To create a software-defined sensing reaction system for intelligent THz wave manipulation.

Main Methods:

  • Utilized a phase change material to create a SAM with THz wave detection and modulation functionalities.
  • Applied various coding sequences to control the metasurface's THz beam deflection.
  • Established a software-defined sensing reaction system for autonomous control.

Main Results:

  • The SAM demonstrated THz beam deflection over a wide angle range of 42.8°.
  • The integrated system achieved self-adaptive adjustment of THz beam deflection and stabilized reflected power.
  • The system operated autonomously, responding to detected signals without human intervention.

Conclusions:

  • The developed SAM and software-defined system offer a promising platform for intelligent electromagnetic information processing in the THz regime.
  • This technology has significant potential for applications like eliminating coverage dead zones in THz communication systems.