Viktor Malyarchuk

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Viktor Malyarchuk
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Plasmonic crystal biosensor
Objectives
Technical Approach
Zero order transmission experiment

• To develop grating based plasmonic biosensor
  using grating coupler that allow to make it
  really small.
• To tune surface plasmon polariton frequency into
  absorption region for chemicals need to be
  detected.
• To boost its performance using unconventional
  Brillouin zone regions for detection.

Technical Accomplishments
Full Plasmonic Brillouin Zoneand kinetics
experiment

• Nanotransfer printing was used to produce 2D
  palsmonic crystal.
• Sensing cappabiliteis of the device was
  demonstrated. Kinetics protein binding experiment
  was performed.
• Boost in sensitivity is evident in the places
  where the dispersion curves of multiple surface
  plasmon polariton modes converge.

Contact Viktor Malyarchuk malyar_at_uiuc.edu
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Outline

• Surface plasmon polariton
• Nanoimprinted plasmonic crystal
• Plasmonic Brillouin Zone
• Sensing with plasmonic crystals
• Hot stuff from the lab

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Surface plasmon polariton (SPP)
Surface plasmons are longitudinal coherent charge
oscillation localized to a metal/dielectric
boundary. Surface plasmon polariton
associated evanescent electromagnetic mode
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Dispersion relation of SPP
Momentum of the surface plasmon polariton is
larger than the photon momentum at the same
energy.
Nonradiative plasmons
How to excite SPP
H. Raether, Springer, Berlin (1988)
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Prism and grating couplers
Biacore3000
kph n(?/c)
Polarized Far Field light can excite surface
plasmon polaritons on a metal grating.
kph
G
Single resonance
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Cheap way to do plasmonic crystals
Nanotransfer printing
J. Zaumseil et al., Nano Letters 3, 1223-1227
(2003)
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Plasmonic Crystal
This is a plasmonic crystal
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Angle-dependent transmission spectra
Energetic resonances for SPP excitation
Out of plane
In plane
kx
ky
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Plasmonic Brillouin Zone
Square grating
Square Brillouin Zone
M
X
G
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Plasmonic Brillouin Zone Construction
Flat Au/PDMS
STEP 1
em(?) for Au taken from experiment or
calculated by Drude model
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Plasmonic Brillouin Zone Construction
Periodic Au/PDMS
STEP 2
Folding kx into irreducible Plasmonic Brillouin
Zone
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Plasmonic Brillouin Zone Construction
Taking ky into account
STEP 3
ky components are always present because
of depolarization effects
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Plasmonic Brillouin Zone Construction
Folding ky
STEP 4
Plasmonic Brillouin Zone for Au/PDMS interface of
the plasmonic crystal
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Sensing
No coating
Hexadecanethiol coating
V. Malyarchuk et al., Optics Express 13,
(5669-5675) 2005
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Sensitivity map
V. Malyarchuk et al., Optics Express 13,
(5669-5675) 2005
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Transmission
G-point
X/2-point
M/2-point
M
X
G
V. Malyarchuk et al., Optics Express 13,
(5669-5675) 2005
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Full Brillouin Zone Mapping
Square Brilloin Zone Sealed Holes
Square Brillouin Zone Classic Crystal
Hexagonal Brillouin Zone
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Square Brillouin Zone Classic Crystal
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Square Brillouin Zone Sealed Holes
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Hexagonal Brillouin Zone Sealed Holes
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Full Brillouin Zone (Classic)
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Full Brillouin Zone (Nanoimprinted)
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Nanoimprinted vs. Classic (Cuts)
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Nanoimprinted vs. Classic (Maps)
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Kinetics (Transmission)
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Kinetics (Sensitivity)
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Kinetics (Absolute Sensitivity)
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Kinetics (Buffer vs. Binded Protein)
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Kinetics (Binding)
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Thanks!
Nate Mack Hamide Kavak Vanessa Velasquez Joana
Maria Matthew Stewart John Rogers Ralph Nuzzo