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+
-
Ene
rgy
(eV
)
Extinction (a.u.)
D=130nm
d1=200nm d2=150nm Subradiance
enhance the sharpening of the linewidth!
Max: 91
Max: 23 Max: 112
Max:18 Max: 120
J. Aizpurua et al PRL 90, 057401 (2003)
Fabricated in IMEC
F. Hao et al PRB 76, 245417 (2007)
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Ext
inct
ion
(a.
u.)
Plasmon Energy (eV)
d1=200nm d2=180nm H=50nm
D=100nm
D=130nm
D=150nm
D=160nm
D=170nm
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Wavelength (nm)
Ext
inct
ion
(a.u
.)d1=200nm d2=150nm D=90nm H=50nm
d1=200nm d2=150nm D=120nm H=50nm
d1=200nm d2=180nm D=150nm H=50nm
d1=200nm d2=180nm D=150nm H=25nm
d1=600nm d2=540nm D=450nm H=75nm
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Max: 110
Max: 11
k
Eθ
Max: 102
Max: 41
Max: 41Max: 36
θ=90°
Max: 119
Max: 38Max: 24
Max: 21
θ=45°
Wavelength (nm)
Ext
inct
ion
(a.u
.)
θ=0°
Wavelength (nm)
A common substrate for both SERS and SEIRA !
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Wavelength (nm)
Ext
inct
ion
(a.u
.)
λ=1398 nmλ=2666 nm
λ=1398 nm
λ=2726 nm λ=2801 nm
λ=1469 nm
Wavelength (nm)
k
E
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+
-
Pla
smon
Ene
rgy
(eV
)
Extinction (a.u.)
k
E
k
E
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+
-Wavelength (nm)
|α| (
a.u.
)
λ=1398nm λ=1583nm
λ=2726nm |α| from FDTD
|α| fitted by Fano model
Individual resonances in Fano model
Fano model:
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k1, γ1 k2, γ2Γ
F1 F2 C.L. Garrido Alzar et al Am. J. Phys. 70 (1), 37-41 (2002)
Bright mode Dark mode
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λ=2726nm
λ=768nm
λ=1417nm
λ=937nm
+-
θ=90°
θ=45°
θ=0°
Wavelength (nm)
Ex
tin
cti
on
(a
.u.)
k
Eθ
θ=15°
θ=30°
θ=60°
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+
-
θ=90°
θ=45°
θ=0°
k
Eθ `
θ=15°
θ=30°
θ=60°