研究目的
Investigating the performance of a 3D printed photonic bandgap Bragg waveguide-based resonant fluidic sensor in the THz spectral range for real-time monitoring of the refractive index change of liquid flow.
研究成果
The 3D printed THz Bragg waveguide-based resonant fluidic sensor demonstrates high sensitivity and resolution in monitoring the refractive index change of liquid flow. Its ease of fabrication and good optical characteristics make it suitable for various applications in real-time monitoring of analyte refractive indices.
研究不足
The resolution of the FDM 3D printer is inferior to that of stereolithography (SLA) printers, which may affect the uniformity of layer thickness in the reflector region. The sensor response time is somewhat larger due to the inherent latency of the CW spectroscopy system.
1：Experimental Design and Method Selection:
The study involves theoretical analysis and experimental study of a 3D printed photonic bandgap Bragg waveguide-based resonant fluidic sensor. The sensor operates in the THz spectral range and is designed to monitor the refractive index change of liquid flow.
2：Sample Selection and Data Sources:
Liquid analytes with different refractive indices are injected into a microfluidic channel inside the reflector region of the waveguide.
3：List of Experimental Equipment and Materials:
A low-cost table top fused modeling deposition (FDM) 3D printer is used for fabrication. The materials include polylactide (PLA) for the waveguide and air for the layers.
4：Experimental Procedures and Operational Workflow:
The fabricated PLA THz fluidic sensor is characterized by a continuous-wave (CW) THz spectrometer system. The transmission spectra are analyzed to deduce the sensor sensitivity and resolution.
5：Data Analysis Methods:
The amplitude and phase data from normalized transmission spectra are analyzed using Lorentzian and Sigmoid fits, respectively, to determine the sensor's performance metrics.
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