Surface Plasmon Resonance Microscopy with a Near Field Scanning Optical Microscope

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Surface Plasmon Resonance Microscopywith a Near
Field Scanning Optical Microscope
Glenn Fried
Acknowledgments Imaging Technology group Bohn
Research group
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Outline

• Surface plasmon background
• Previous work in the field
• Instrumentation
• Results
• Conclusion

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Surface plasmons
E
Dielectric
Y
- - - - - - - - - - - -

Plasma
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Surface plasmons
ksp
kl
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Surface Plasmon Resonace Today

• Analytical technique
• Detection of self assembled monolayers
• Imaging self assembled monolayer on a large scale

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Imaging Surface plasmons with Near field Scanning
Microscopy

• Rough surfaces
• Colloidal particles
• Point excitation
• Designed surface patterns

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Instrumentation
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Instrumentation
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Angle dependence
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Angle dependence
188 15
187 55
188 00
188 30
188 50
189 10
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Polarization dependence
P Polarization
S Polarization
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Edge of an organic film
topography
Surface plasmon
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Angle variation at the edge of an organic film
94
9530'
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Conclusions

• Near field surface plasmon imaging can be used to
  image organic films.
• Surface plasmon intensity follows predictions.
• Resolution is limited by the decay length of the
  surface plasmon wave, as predicted. (2 um)