plasmonic structure Kwang Hee Lee 2010 5 19 Photonic Systems Laboratory Contents Introduction of surface plasmon polariton SPP Extraordinary transmissionEOT Effect factors of transmission ID: 590579
Download Presentation The PPT/PDF document "Beam manipulation via" is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
Slide1
Beam manipulation via plasmonic structure
Kwang
Hee
, Lee
2010. 5. 19
Photonic Systems LaboratorySlide2
ContentsIntroduction of surface plasmon
polariton
(SPP)
Extraordinary transmission(EOT)
Effect factors of transmission
Exit patterning
SummarySlide3
What is the SPP?for
Evanescent modes
+ +
x
Metal
Dielectric
+ +
+ +
- -
- -
+ +
zSlide4
SPP at a single interfaceSlide5
Where can SPP be used?Integrated electro-photonics,
will
remove the crosstalk and
Ohmic
loss of Electronics
meanwhile retaining the
nano
-features of ElectronicsSlide6
EOTExtraordinary Transmission (EOT)
Sub-wavelength hole arrays : peak at above a
0
contribution of surface modes
Due to grating coupling at regular, periodic lattice
Phase matching condition
Ebbesen
, T. W.,
Lezec
, H. J,
Ghaemi
, H. F., Thio, T., and Wolff, P. A. “Extraordinary optical transmission through sub-wavelength hole arrays.” Nature, 931:667–669. 1998.Slide7
EOTExtraordinary Transmission (EOT)
EOT occurs at another structures : Bull’s eye, square dimple array, slit array
Thio
,
Tineke
,
Pellerin
, K. M.,
Linke
, R. A.,
Lezec
, H. J., and
Ebbesen, T. W. “Enhanced light transmission through a single subwavelength aperture.” Opt. Lett., 26(24):1972–1974. 2001.Porto, J. A., Garcia-Vidal, F. J., and Pendry, J. B. “Transmission resonances on metallic gratings with very narrow slits.” Phys. Rev. Lett., 83(14):2845–2848. 1999.Slide8
Effect factors of transmissionFactor for Surface Plasmon Polaritons (SPP)Flim thickness : T saturation for small thickness (order of skin depth)
Hole width : T increases and the peaks broaden for increasing hole width
Degiron
, A.,
Lezec
, H. J.,
Barnes,W
. L., and
Ebbesen
, T.W. “Effects of hole depth on enhanced light transmission through
subwavelength
hole arrays.”
Appl. Phys. Lett., 81(23):4327–4329. 2002.van der Molen, K. L., Segerink, F. B., van Hulst, N. F., and Kuipers, L. “Influence of hole size on the extraordinary transmission through subwavelength hole arrays.” Appl. Phys. Lett., 85(19):4316–4318. 2004.Slide9
Effect factors of transmissionFactor for Surface Plasmon Polaritons (SPP)Coupled cavity modes in the grooves
h : about frequency
d : about in-phase re-emmision
Exit side grooves don’t influence T
García
-Vidal, F. J.,
Lezec
, H. J.,
Ebbesen
, T. W., and
Martín
-Moreno, L. “Multiple paths to enhance optical transmission through a single
subwavelength slit.” Phys. Rev. Lett., 90(21):213901. 2003.Slide10
Effect factors of transmissionLocalized Surface Plasmons (LSP)
In contrast to PEC case, the maximum in the transmission of real metal near 580 nm can be associated with the excitation of a localized surface plasmon.
the nanohole excitation decays not only into scattered light, but into surface plasmon polaritons.
Chang et al.,“Surface plasmon generation and light transmission by isolated nanoholes and arrays of nanoholes in thin metal films”,
Opt. Express,
Vol.13, No.8, 3150, 2005.Slide11
Effect factors of transmissionLocalized Surface Plasmons (LSP)
Charges accumulate at the edges with a length scale of one wavelength. This increasing charge density enhances the electric field.
The electric field is proportional to the charging time or equivalently 1/f.
Seo et al.,“Terahertz field enhancement by a metallic nano slit operating beyond the skin-depth limit”,
Nature Photonics,
Vol.3,No.3,152-156, 2009.Slide12
Effect factors of transmissionWaveguide resonance
F.J.Garcia-Vidal et al., “Transmission of Light through a Single Rectangular Hole” ,
PRL, 95,
103901, 2005.
Normalized-to-area transmittance at resonance is
proportional to the aspect ratio
, and to the
dielectric constant inside the hole
.
A transmission peak develops at approximately
λ
c
=2ay, with increasing maximum transmittance and decreasing linewidth as ay/ax increases.Slide13
Exit surface patterningExit surface patterning enables directional emission
Lezec
, H. J.,
Degiron
, A.,
Devaux
, E.,
Linke
, R. A., Martin-Moreno, L., Garcia-Vidal, F. J, and
Ebbesen
, T. W. “Beaming light from a
subwavelength
aperture.” Science, 297:820– 822. 2002.Slide14
Exit surface patterningNarrow beam profile is obtained with about 10 grooves
Martín
-Moreno, L., Garcia-Vidal, F. J.,
Lezec
, H. J.,
Degiron
, A., and
Ebbesen
, T. W. “Theory of highly directional emission from a single
subwavelength
aperture surrounded by
surface corrugations.
” Phys. Rev. Lett., 90(16):167401. 2003.Slide15
Off-axis beaming with asymmetric surface gratingsExit surface patterning
Seyoon
Kim,
Hwi
Kim,
Yongjun
Lim, and
Byoungho
Lee
, “Off-axis directional beaming of optical field diffracted by a single
subwavelength
metal slit with asymmetric dielectric surface gratings” Applied Physics Letters 90, 051113, 2007Slide16
Near-field optical probe(conical geometry)Micro-fluidic detector
Applications
Drezet et al., “Extension of Bethe’s diffraction model to conical geometry” ,
Europhys. Lett.,
54(6), pp. 736-740, 2001.
Bravo-Abad et al., “Transmission properties of a single metallic slit” ,
Physical Review E,
69, 026601, 2004.
ε
=1.8978
ε
=2.2506Slide17
Optical switching using nonlinear materialApplications
Porto et al., “Optical bistability in subwavelength slit apertures containing nonlinear media”,
Phys. Rev. B
, 70, 081402, 2004.
The transmission spectra differ for increasing and decreasing fluxes.
d=0.75, a=0.05, h=0.45 um
Optical bistabilitySlide18
SummarySPP has a great possibility to integrate electronics and photonicsExtraordinary
transmission is generated from SPP which is influenced by geometrical parameters.
Transmission is also influenced by
LSP
and waveguide
resonance.
With exit surface patterning, directional
emmision
and off-axis beaming can be possible.
EOT is applicable to various optical devices such as switch, probe and so on.