Surface plasmons
Surface plasmons
Surface plasmons
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Localized <strong>Surface</strong> Plasmons :<br />
Nanofocusing and Nanolithography<br />
ω (10 15 s -1 )<br />
8<br />
6<br />
4<br />
2<br />
ω=c k x<br />
λ=337 nm; ε 1 = -1<br />
Broad<br />
dispersion<br />
0<br />
0 20 40 60 80 100<br />
k x (μm -1 )<br />
'<br />
1<br />
At large kx<br />
( ε1 →−ε2), z i ≈ .<br />
kx<br />
E = ± iE ( air : + i, metal :- i)<br />
z x<br />
Strong confinement at the interface<br />
Nano focusing
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