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Using Metal-Multilayer-Dielectric Structure to Increase Sensitivity of Surface Plasmon Resonance Sensor
Svitlana G Ilchenko1, Ruslan A Lymarenko2, Victor B Taranenko2
1International Center "Institute of Applied Optics", National Academy of Science of Ukraine, 10G Kudryavska street, Kyiv, 04053, Ukraine. svitlana-ilchenko@ukr.net.
Nanoscale Research Letters
|April 28, 2017
Summary
A novel metal-multilayer-dielectric structure boosts evanescent field strength, enhancing surface plasmon resonance sensor sensitivity. This design improves waveguide transverse electric modes for better sensing performance.
Area of Science:
- Optics and Photonics
- Materials Science
- Sensor Technology
Background:
- Surface Plasmon Resonance (SPR) sensors are crucial for label-free biosensing.
- Enhancing the evanescent field is key to improving SPR sensor sensitivity.
- Existing SPR structures face limitations in maximizing evanescent field strength.
Purpose of the Study:
- To introduce a novel metal-multilayer-dielectric structure for SPR sensors.
- To investigate the enhancement of the evanescent field using this structure.
- To improve the sensitivity of SPR sensors through optimized mode support.
Main Methods:
- Numerical simulations were employed to analyze the proposed structure.
- The structure was designed on a glass substrate with metal-multilayer-dielectric layers.
- Supported optical modes (hybrid plasmonic TM and waveguide TE) were investigated.
Main Results:
- The proposed structure significantly enhances the evanescent field.
- Improved sensor sensitivity was demonstrated, particularly for waveguide transverse electric modes.
- The structure supports both hybrid plasmonic transverse magnetic and waveguide transverse electric modes.
Conclusions:
- The designed metal-multilayer-dielectric structure offers a promising approach for advanced SPR sensors.
- Significant evanescent field enhancement and sensitivity improvements are achievable.
- The findings pave the way for more sensitive and efficient optical sensing platforms.
