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Multi-Channel Fabry-Perot Etalon

Multi-Channel Fabry-Perot Etalon. E. Dagher , R. Liu, J. Vaillancourt. Outline. Objectives Division of Work Background Mirror Fabrication Cavity Fabrication Biomaterials. Sample Preparation Test Procedure Results Timeline Future Work Conclusion. Objective.

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Multi-Channel Fabry-Perot Etalon

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  1. Multi-Channel Fabry-Perot Etalon E. Dagher, R. Liu, J. Vaillancourt

  2. Outline • Objectives • Division of Work • Background • Mirror Fabrication • Cavity Fabrication • Biomaterials • Sample Preparation • Test Procedure • Results • Timeline • Future Work • Conclusion

  3. Objective To design and build a proof of concept experiment for a novel high sensitivity biosensor based on a Fabry-Perot cavity

  4. Division of Work • Initial Design Simulations and Evaluation • Sims Approach Research and Evaluation • MS Excel • Biomaterial Sample Prep Rui: Jarrod: • Fabricate device for testing • Obtain materials • Assemble the prototypes • Build test setup Emile: • Write test programs to acquire data • Control instruments • Demodulate the signal • Graph results • Automate the testing/graphing procedure

  5. R=.3 R=.9 R=.5 λm+1 λm-1 λm • Important Properties of a F-P Cavity: • Free Spectral Range: • Finesse: • Resonant Condition: where m=1,2,3 … Background

  6. Glass Glass Glass Glass Glass Glass Glass Glass Glass Glass Air Air Mirrors Glass Glass Glass Glass Glass Glass BIO Material

  7. Mirror Mirror Mirror Mirror Glass Glass Glass Glass Glass Glass Glass Glass Glass Glass Air Air Air Air Glass Glass Glass Glass BIO Material

  8. Mirror Fabrication • Mirrors will be formed using AJA 7000 Sputtering System • Many metal coatings available • Au, Ag, Al, Ti, Ni, Cr • Low pressure for high quality films • Precise control of the thickness

  9. Mirror Fabrication Glass Titanium Gold

  10. Mirror Testing Transmission @ 1.55µm Glass: 87% 10Å Ti / 40Å Au: 47% 10Å Ti / 70Å Au: 18% 10Å Ti / 40Å Au 10Å Ti / 70Å Au

  11. Cavity Fabrication

  12. Cavity Fabrication

  13. Cavity Fabrication

  14. Verification of Cavity

  15. Cavity Fabrication • Reason for Failure: • Only 150Å of gold • Missing the “sticking layer” • Solution: • Use a sticking layer • Can be Ni, Ti, Cr

  16. Biomaterials • Biomaterials in cavities: • Protein G • IgG • Fab • Same Concentration for all experimental setups

  17. Sample Preperation 2 1

  18. Coating Biomaterials Glass Protein G IgG Protein G IgG Glass Gold

  19. Cavity Setup

  20. Testing Block Diagram GPIB/IEEE Cable PC/Matlab Single Mode Fiber Micron Optics si720 Optical Sensing Analyzer Detected light Power Input Test Setup

  21. Matlab GUI Interface Start Folder/File location to save data Start/Stop Wavelengths Figure

  22. Test Automation Block Diagram Run Matlab GUI Locate File/Folder Location to save data Start/Stop Wavelengths -Set the Start/Stop Wavelengths on Optical Analyzer -Start Sweeping through wavelengths -Get data results and save them in specified folder Start Show Results

  23. Timeline

  24. Future Work 1. Multi-channel Fabry-Perot cavity waveguide structure. Mirrored Ends Multiple Channels Silicon Waveguide Silicon Substrate Silicon substrate

  25. Future Work 1. Multi-channel Fabry-Perot cavity waveguide structure 2. Integrated with microfluidics Biomaterials Fluid Cavity Polymer Cap

  26. Waveguide with microfluidics • Benefits: • Reduced device size • Can create more channels for biomaterials • Enables mass production • Uniform device size Biomaterials

  27. Conclusion • Fabrication of Cavities is feasible • Goal has been reached • Introduce mirror reflectivity as a variable when testing

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