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Updated: May 11, 2026
Evaluating Plasmonic Transport in Current-carrying Silver Nanowires
Published on: December 11, 2013
Metal single-nanowire plasmonic sensors
Fuxing Gu1, Heping Zeng, Limin Tong
1Institute Shanghai Key Laboratory of Modern Optical System, Engineering Research Center of Optical Instrument and System, Ministry of Education, School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.
Researchers developed a plasmonic sensing method using single metal nanowires and fiber tapers. This technique achieved high sensitivity for hydrogen detection and rapid response for humidity sensing, paving the way for advanced nanowire sensors.
Area of Science:
- Nanotechnology
- Plasmonics
- Chemical Sensing
Background:
- Plasmonic sensors offer high sensitivity for detecting analytes.
- Metal nanowires exhibit unique optical properties suitable for sensing applications.
- Efficient light coupling into nanowires is crucial for sensor performance.
Purpose of the Study:
- To demonstrate a general approach for plasmonic sensing using single metal nanowires.
- To utilize evanescent coupling for efficient light interaction with nanowires.
- To develop highly sensitive and fast-response plasmonic sensors.
Main Methods:
- Fabrication of single metal nanowires (e.g., gold, silver).
- Integration of nanowires with silica fiber tapers for evanescent coupling.
- Characterization of sensor performance for hydrogen and humidity detection.
Main Results:
- Achieved high amplitude sensitivity (~13 dB to 1.2% hydrogen) using palladium-coated gold nanowires.
- Demonstrated a fast response time (~5 ms) for relative humidity sensing with silver nanowires.
- Validated the effectiveness of the evanescent coupling technique for nanowire-based sensing.
Conclusions:
- The demonstrated approach provides a versatile platform for metal nanowire plasmonic sensors.
- This method enables sensitive and rapid detection of various analytes.
- The findings support the development of next-generation plasmonic sensing devices.
