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Broadband and high-power microfiber switch driven by surface-charge-enhanced electrostatic force.

Bohuan Chen, Jiatong Liu, Ni Yao

|May 4, 2026

Summary

This summary is machine-generated.

Researchers developed a novel all-fiber optical switch using surface-charge-enhanced electrostatic force. This innovation enables low-voltage, high-speed switching with ultra-broadband transparency, ideal for advanced computing and optical networks.

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Area of Science:

Photonics and Optical Engineering
Materials Science
Electrical Engineering

Background:

High-performance computing and AI demand optical switches with broad bandwidth and high power handling.
Conventional silica-based fiber switches face limitations due to high operating voltages and material absorption.
Existing technologies struggle to meet the stringent requirements for stable operation in advanced systems.

Purpose of the Study:

To propose and demonstrate an all-fiber optical switch utilizing surface-charge-enhanced electrostatic force.
To overcome the limitations of conventional silica-based fiber switches.
To provide a practical solution for next-generation reconfigurable optical networks and high-power signal management.

Main Methods:

Development of an all-fiber switch driven by surface-charge-enhanced electrostatic force.
Controlled triboelectric charging process to inject charges into a micro/nanofiber cantilever.
Shifting the actuation mechanism from polarization-gradient forces to Coulomb interactions.

Main Results:

Achieved a static switching voltage of 59.9 V and a resonant switching voltage of 20.0 V.
Demonstrated sub-millisecond response times (<139 µs).
Exhibited ultra-broadband transparency (450-1600 nm) and stable performance under high optical power loads (up to 0.6 W).

Conclusions:

The surface-charge engineering approach offers a robust and efficient method for optical switching.
The developed all-fiber switch meets the demands for broad bandwidth, low voltage, and high power handling.
This technology presents a viable solution for next-generation reconfigurable optical networks and advanced signal management.