objectives division of work background mirror fabrication cavity fabrication biomaterials sample...
TRANSCRIPT
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•Objectives
•Division of Work
•Background
•Mirror Fabrication
•Cavity Fabrication
•Biomaterials
•Sample Preparation
•Test Procedure
•Results
•Timeline
•Future Work
•Conclusion
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To design and build a proof of concept experiment for a novel high sensitivity biosensor based on a Fabry-Perot cavity
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Division of WorkDivision of Work• Initial Design Simulations and Evaluation
o Sims Approach Research and Evaluationo MS Excel
• Biomaterial Sample Prep
• Fabricate device for testingo Obtain materialso Assemble the prototypes
• Build test setup
Write test programs to acquire data◦ Control instruments◦ Demodulate the signal◦ Graph results◦ Automate the testing/graphing procedure
Rui:
Jarrod:
Emile:
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Important Properties of a F-P Cavity:
• Free Spectral Range:
• Finesse:
• Resonant Condition: where m=1,2,3 …
mm
nL 1
2
2
R
RF
1
R=.3
R=.5 R=.9
λm λm+1λm-1
BackgroundBackground
nLm m 2
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Glass Glass Glass Glass
Glass Glass
Mirrors
Glass
Glass
Air
Glass Glass Glass Glass
Glass Glass
Glass
Glass
Air
BIO Material
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Glass Glass Glass Glass Glass
Glass Glass
AirAir
Mirror Mirror
BIO Material
Glass Glass Glass Glass Glass
Glass Glass
AirAir
Mirror Mirror
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Mirror FabricationMirror FabricationMirrors 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
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Mirror FabricationMirror Fabrication
GlassTitanium
Gold
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Mirror TestingMirror Testing
Transmission @ 1.55µm
Glass: 87%
10Å Ti / 40Å Au: 47%
10Å Ti / 70Å Au: 18%
10Å Ti / 40Å Au
10Å Ti / 70Å Au
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Cavity FabricationCavity Fabrication
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Cavity FabricationCavity Fabrication
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Cavity FabricationCavity Fabrication
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Verification of CavityVerification of Cavity
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Cavity FabricationCavity Fabrication
Reason for Failure:•Only 150Å of gold
• Missing the “sticking layer”
Solution:• Use a sticking layer
• Can be Ni, Ti, Cr
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•Biomaterials in cavities:•Protein G•IgG•Fab
•Same Concentration for all experimental setups
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Coating BiomaterialsCoating Biomaterials
Glass
Protein G
IgG
Glass Protein GIgG
Gold
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PC/Matlab
GPIB/IEEE Cable
Micron Optics si720
Optical Sensing Analyzer
Test Setup
Single Mode Fiber
Testing Block Diagram
Power Input Detected light
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Start
Folder/File location to save data
Start/Stop Wavelengths
Figure
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Run Matlab GUI
Locate File/Folder Locationto save data
Start/Stop Wavelengths
Start
-Set the Start/Stop Wavelengths on Optical Analyzer
-Start Sweeping through wavelengths
-Get data results and save them in specified folder
Show Results
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30-Jan
6-Feb
13-Feb
20-Feb
27-Feb
5-Mar
12-Mar
19-Mar
26-Mar
2-Apr
9-Apr
16-Apr
23-Apr
30-Apr
7-May
14-May
Literature Review
Simulations
Prepare for Report I and Presentartion
Procure Raw Materials
Form Mirrors and Assemble Cavity
Write Code for Testing
Build Test Set up and Preform Experiments
Prepare for Report II and Presentation
Data Analysis / Retest
Prepare Final Report and Presentation
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Future WorkFuture Work
1. Multi-channel Fabry-Perot cavity
waveguide structure.
Silicon Substrate
Silicon Waveguide
Multiple Channels
Mirrored Ends
Silicon substrate
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Future WorkFuture Work1. Multi-channel Fabry-Perot cavity
waveguide structure
2. Integrated with microfluidics Biomaterials
Fluid Cavity
PolymerCap
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Waveguide with Waveguide with microfluidicsmicrofluidicsBenefits:• Reduced device size
• Can create more channels for biomaterials
• Enables mass production
• Uniform device sizeBiomaterials
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• Fabrication of Cavities is feasible
• Goal has been reached
• Introduce mirror reflectivity as a variable when testing
ConclusionConclusion