Electric split-ring metamaterial based microfluidic chip with multi-resonances for microparticle trapping and...

Area of Science:

• Metamaterials and Plasmonics
• Microfluidics and Lab-on-a-Chip Technology
• Terahertz (THz) Spectroscopy

Background:

• Terahertz (THz) technology offers unique capabilities for non-destructive analysis.
• Microfluidic devices enable precise manipulation and analysis of small sample volumes.
• Electrical split-ring metamaterials (eSRMs) exhibit tunable resonant properties in the THz range.

Purpose of the Study:

• To integrate eSRMs with a microfluidic chip for enhanced microparticle trapping and sensing.
• To investigate the resonant modes and refractive index sensitivity of the eSRM-based microfluidic system.
• To demonstrate the chip's capability for selective microparticle detection and characterization.

Main Methods:

• Fabrication of a microfluidic chip integrated with a dislocation-arranged eSRM array.
• Excitation of multiple resonant modes (LC, quadrupole, octupolar) in the THz spectrum.
• Design of elliptical barricades on eSRM surfaces for microparticle trapping in a transverse electric (TE) mode.
• Testing with microparticles of varying sizes and refractive indices (1.0-2.0) in an ethanol medium.

Main Results:

• The eSRM-based microfluidic chip exhibited multiple THz resonances.
• Selective trapping of microparticles based on size characteristics was achieved.
• The system showed high sensitivity to environmental refractive index changes.
• Successful demonstration of single microparticle trapping and sensing capabilities.

Conclusions:

• The developed eSRM-based microfluidic chip effectively traps and senses microparticles.
• The high sensitivity to refractive index makes it suitable for microorganism and chemical sensing.
• This integrated platform holds promise for diverse environmental and biological applications.