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Updated: Jul 1, 2026

Use of Label-free Optical Biosensors to Detect Modulation of Potassium Channels by G-protein Coupled Receptors
Published on: February 10, 2014
Label-Free Bound-States-in-the-Continuum Biosensors
Man Luo1, Yi Zhou1, Xuyang Zhao1
1The Key Laboratory of Micro and Nano Photonic Structures, Department of Optical Science and Engineering, Fudan University, Shanghai 200438, China.
Bound states in the continuum (BICs) offer infinite quality factors for highly sensitive label-free biosensing. This review explores BIC-based optical biosensors using various materials and structures for advanced detection.
Area of Science:
- Photonics and Nanotechnology
- Biomedical Sensing
- Optical Physics
Background:
- Bound states in the continuum (BICs) possess theoretically infinite quality (Q)-factors.
- High-Q factors enable enhanced light-matter interactions, crucial for sensitive detection.
- BICs are promising for label-free biosensing applications due to their sensitivity to refractive index changes.
Purpose of the Study:
- To review recent advancements in label-free optical biosensors utilizing BICs.
- To categorize BIC biosensors based on their constituent materials and structural designs.
- To discuss current challenges and future outlook for BIC-inspired biosensors.
Main Methods:
- Review of literature on BIC-based biosensors.
- Categorization of sensors by material composition (dielectric, metal, hybrid).
- Classification of sensors by structural implementation (grating, metasurfaces, photonic crystals).
Main Results:
- BIC biosensors demonstrate high sensitivity for label-free detection.
- Diverse material platforms (dielectric, metal, hybrid) are employed.
- Various structures including gratings, metasurfaces, and photonic crystals support BICs for sensing.
Conclusions:
- BIC-based optical biosensors represent a significant advancement in label-free sensing technology.
- The choice of material and structure critically influences sensor performance.
- Further research is needed to overcome current challenges and fully realize the potential of BIC biosensors.
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