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Simultaneously performing optical and electrical responses from a plasmonic sensor based on gold/silicon Schottky
Optics Express
|December 28, 2019
Summary
This study introduces a novel plasmonic refractive-index sensor using a gold/silicon Schottky junction for simultaneous optical and electrical detection. This simplified sensor design offers enhanced sensitivity for chemical and biological sensing applications.
Area of Science:
- Nanotechnology
- Materials Science
- Sensor Technology
Background:
- Developing simpler, compatible sensors is crucial for commercial applications.
- Existing sensors often lack integrated optical and electrical read-out capabilities.
Purpose of the Study:
- To propose a plasmonic refractive-index sensor based on a gold/silicon Schottky junction.
- To achieve simultaneous optical and electrical read-out responses for enhanced sensing.
Main Methods:
- Utilizing surface plasmon resonance (SPR) excitation.
- Designing a gold/silicon Schottky junction device.
- Employing electrodynamic calculations for hot electron analysis.
Main Results:
- The sensor demonstrates tunable SPR resonance in the 1100-2000 nm range.
- Achieved high optical sensitivity exceeding 1000 nm/RIU.
- Predicted electrical response up to 14.5 mA/(W·RIU) for trichloromethane detection.
Conclusions:
- The proposed sensor enables simplified, simultaneous optical and electrical detection.
- The device offers high sensitivity and tunable SPR characteristics.
- This technology advances chemical and biological sensing with improved compatibility.
