Performance analysis of hyperbolic graded topological resonator for biosensing applications

Area of Science:

• Photonics
• Nanotechnology
• Materials Science

Background:

• Photonic crystals offer unique optical properties.
• Topological properties in photonic crystals enable novel functionalities.
• Biosensing requires high sensitivity and specificity.

Purpose of the Study:

• To propose a novel hyperbolic-graded nano-photonic resonator for biosensing.
• To leverage topological properties for enhanced sensing performance.
• To achieve high sensitivity and figure of merit in biosensing applications.

Main Methods:

• Designing a hyperbolic-graded photonic crystal structure.
• Utilizing porous silicon with modulated refractive index.
• Optimizing design parameters for topological edge state excitation.
• Analyzing performance using the finite element method.

Main Results:

• Excitation of a topological edge state at 1521 nm and a resonating topological edge state (TES) at 1533 nm.
• Achieved sensitivity of 1806 nm/RIU.
• Achieved a Figure of Merit (FOM) of 4030 RIU⁻¹.
• Demonstrated significant improvements (151% and 2483%) over reported values.

Conclusions:

• The proposed hyperbolic-graded nano-photonic resonator exhibits remarkable biosensing performance.
• The design enables highly sensitive and efficient detection of biochemical samples.
• This topological photonic crystal structure holds significant promise for advanced biosensing.