Related Experiment Video
Updated: May 5, 2026
07:39
Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
6.9K
Lateral, Directional, and Polarized Light Emission from a Silicon Metasurface.
Yuheng Mao1, Lidan Zhou2, Zhuo Wang1
1Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, School of Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China.
Nano Letters
|September 1, 2025
Summary
Researchers developed a silicon metasurface that emits light, crucial for integrated optical circuits. This silicon light source couples efficiently into waveguides, enabling advanced photonic applications.
Area of Science:
- Photonics and Nanotechnology
- Materials Science
Background:
- Integrated optical circuits require efficient silicon (Si) light sources.
- Current Si photonics often rely on external light sources, limiting miniaturization and efficiency.
Purpose of the Study:
- To investigate light emission from a silicon metasurface composed of paired Si nanocuboids.
- To explore the potential of this metasurface as an on-chip light source for integrated optical circuits.
Main Methods:
- Fabrication of a Si metasurface with paired Si nanocuboids.
- Excitation of the metasurface using 400 nm femtosecond laser pulses.
- Systematic investigation of the resulting light emission properties, including spectral range, directionality, polarization, and coupling efficiency.
Main Results:
- The Si metasurface exhibits optical resonances across the visible-to-near-infrared spectrum.
- Hot-electron luminescence was observed above a specific excitation irradiance threshold, with a reduced linewidth.
- The emitted light is primarily transverse, wavelength-dependent, linearly polarized, and couples effectively into adjacent Si waveguides for long-distance propagation.
Conclusions:
- The developed Si metasurface demonstrates promising light-emitting properties for integrated photonics.
- This research paves the way for realizing silicon-based lasers and light sources for advanced integrated optical circuits.
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