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Published on: November 21, 2019
Disposable and compact integrated plasmonic sensor using a long-period grating.
1Department of Optical Engineering, Sejong University, 98 Gunja-dong, Gwangjin-gu, Seoul 143-747, South Korea. mskwon@sejong.ac.kr
Optics Letters
|November 18, 2010
Summary
This study introduces a novel, compact plasmonic sensor for refractive index detection. Its innovative design offers disposability, enhancing its practical application in sensing technologies.
Area of Science:
- Photonics
- Plasmonics
- Sensing Technology
Background:
- Surface plasmon polaritons (SPPs) and dielectric waveguide (DW) modes are crucial in optical sensing.
- Existing plasmonic sensors may lack disposability or compactness.
Purpose of the Study:
- To theoretically propose and investigate an integrated plasmonic sensor.
- To demonstrate a sensor design with grating-assisted coupling for enhanced sensitivity.
- To highlight the sensor's disposability and compactness.
Main Methods:
- Theoretical proposal of an integrated sensor combining SPP propagation on a gold film with DW modes.
- Utilizing a long-period grating for coupling between SPP and DW modes.
- Analysis of the sensor's performance in detecting changes in liquid refractive index.
Main Results:
- The designed sensor is compact and integrates SPP and DW modes via grating-assisted coupling.
- The sensor demonstrates characteristics suitable for refractive index sensing.
- The proposed design allows for the replacement of the gold film, ensuring disposability.
Conclusions:
- The integrated plasmonic sensor offers a promising, disposable, and compact solution for refractive index sensing.
- Grating-assisted coupling is an effective mechanism for enhancing sensor performance.
- This design advances the field of integrated plasmonic sensing devices.
