rapid p b s p r (spr) d using comsol & m s · "rapid prototyping" of biosensing...
TRANSCRIPT
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"RAPID PROTOTYPING" OF BIOSENSING SURFACE
PLASMON RESONANCE (SPR) DEVICES
USING COMSOL & MATLAB SOFTWARE
Presented byDominic Carrier
Presented at the COMSOL Conference 2009 Boston
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• Introductiono Why do we need biosensing?o What is biosensing?o How we do it (with SPR)?
• Setup
• Results
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INTRO - WHY
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Distance
Inte
nsity
INTRO - WHAT
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Negative real dielectric constant allows propagating evanescent surface wave (a.k.a. Surface plasmons)
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INTRO - HOW
Dielectric
Metallic Layer
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INTRO - HOW
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WHY
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A B
Incident Light
INTRO - SP 101
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A B A+B
Symmetry Axis
PMLLight Source
Sensing AreaIncident Light Modulated
Surface Plasmon
SETUP
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Symmetry Axis
PMLLight Source
SETUP
Model Specs:• RF Module : 2D in-plane “Harmonic propagation”• Typically 20 to 50 um long• 10 to 20 node elements per wavelength (total ~250 000 elements)
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RESULTS - PART 1
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|Hz|
At Anti-ResonanceAt Resonance
RESULTS - PART 2
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RESULTS - PART 3
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• Successfully achieved reproduction of SPR with Comsol
• Using “rapid-prototyping”, creation of diverse geometry was easy
• Modulation of output signal is observed
• The SP grating cavity is a promising scheme for Biosensing
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Prof. Jan J. Dubowski
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Thank you