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Updated: Jun 12, 2026
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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
Summary
This study models an electrooptic modulator that uses electrically controlled light coupling to surface plasmons. A device demonstrated a reflectance change from 0 to 0.84 with 100 V, showing potential for optical modulation.
Area of Science:
- Photonics and optical engineering
- Materials science
- Electrical engineering
Background:
- Surface plasmon resonance (SPR) offers unique light-matter interaction properties.
- Electrooptic modulators are crucial components in optical communication and sensing systems.
- Controlling light coupling to surface plasmons is key for device performance.
Purpose of the Study:
- To model an electrooptic modulator based on electrically tuned coupling to long-range surface plasmon excitation.
- To investigate the impact of resonance width on modulator performance.
- To evaluate device capabilities under varying electrical field strengths.
Main Methods:
- Theoretical modeling of light coupling to long-range surface plasmons.
- Simulation of an electrooptic modulator with a specific embodiment.
- Analysis using plane-wave and finite beam diffraction calculations.
Main Results:
- Achieved a reflectance modulation from 0.00 to 0.84 with 100 V across a 1-microm electrooptic film.
- Demonstrated that narrower resonance widths can enhance modulation for plane waves.
- Identified that diffraction effects in finite beams can degrade performance with narrower resonance widths.
Conclusions:
- The proposed electrooptic modulator design shows significant modulation capabilities.
- Resonance width is a critical parameter influencing modulator performance, with trade-offs between ideal and realistic conditions.
- Further optimization considering diffraction is necessary for practical device realization.
