Related Experiment Video
Updated: Dec 21, 2025
07:22
Author Spotlight: Fabrication of a Low-Cost, Fiber-Coupled, and Air-Spaced Fabry-Pérot Etalon
Published on: February 3, 2023
7.7K
Record-High Transparent Electromagnetic Interference Shielding Achieved by Simultaneous Microwave Fabry-Pérot
Changwei Yuan1,2, Jinhua Huang1, Yuxuan Dong1
1Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.
ACS Applied Materials & Interfaces
|May 19, 2020
Summary
Researchers developed transparent electromagnetic interference (EMI) shielding materials using silver layer sandwiched by oxides (SLSO). These materials offer high shielding effectiveness and visible transmittance, protecting against radio frequency (RF) radiation.
Area of Science:
- Materials Science
- Physics
- Optoelectronics
Background:
- Radio frequency (RF) radiation poses risks, necessitating effective shielding.
- Existing electromagnetic interference (EMI) shielding materials are often opaque, limiting applications.
- Transparent EMI shielding is crucial for optoelectronic devices operating under RF exposure.
Purpose of the Study:
- To propose and fabricate visibly transparent EMI shielding materials.
- To investigate the shielding effectiveness and optical properties of novel materials.
- To understand the unique frequency dependence of the shielding effectiveness.
Main Methods:
- Fabrication of ultrathin silver layer sandwiched by oxides (SLSO) structures.
- Characterization of EMI shielding effectiveness (SE) across a broad frequency range (4-40 GHz).
- Measurement of optical transmittance at visible wavelengths (550 nm).
Main Results:
- Double-sided SLSO (D-SLSO) structures achieved SE of 70 dB at 27.6 GHz and over 62 dB on average.
- Visible transmittance approached 90%, comparable to PET and glass.
- The D-SLSO structure acted as antireflection coatings and enhanced EMI shielding via Fabry-Pérot interference.
- Observed monotonically increasing SE with frequency, unlike conventional metallic meshes.
Conclusions:
- SLSO-based materials offer record-high SE and visible transmittance.
- These materials provide robust safety and reliability for optoelectronic applications under high-frequency RF radiation.
- The novel structure presents a promising solution for transparent EMI shielding needs.
