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Polymeric optofluidic Fabry-Perot sensor by direct laser machining and hot embossing
1Centre for Micro-Photonics, Faculty of Engineering and Industrial Sciences, Swinburne University of Technology, Hawthorn, PO Box 218, Victoria 3122, Australia.
Applied Optics
|May 3, 2011
Summary
We developed a novel polymeric Fabry-Perot optofluidic sensor using direct laser machining and hot embossing. This cost-effective method enhances production speed and reproducibility for refractive index sensing.
Area of Science:
- Optofluidics
- Polymer microfabrication
- Optical sensing
Background:
- Conventional hot embossing for optofluidic sensors is costly and slow.
- Improving production rates and reproducibility is crucial for commercial viability.
Purpose of the Study:
- To develop a cost-effective and efficient method for fabricating polymeric Fabry-Perot optofluidic sensors.
- To demonstrate the sensor's performance for refractive index measurements.
Main Methods:
- Combining direct laser machining with hot embossing for polymer microfabrication.
- Fabricating a Fabry-Perot optofluidic sensor in polymethyl methacrylate (PMMA) using a micromachined stamp.
Main Results:
- Achieved high production rates and improved reproducibility compared to conventional methods.
- Demonstrated a sensitivity of 2.13×10⁻³ RIU/nm for fluid refractive index changes.
- Experimental results showed good agreement with analytical calculations.
Conclusions:
- The presented technique offers an elegant and efficient solution for producing polymeric optofluidic sensors.
- The developed sensor is suitable for sensitive detection of fluid refractive index variations.
- This method allows for large working areas and design flexibility, reducing overall costs.
