TMM Applied for Shell Scattering Weijia Wang Dec.14.2010.
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Transcript of TMM Applied for Shell Scattering Weijia Wang Dec.14.2010.
TMM Applied for Shell Scattering
Weijia Wang
Dec.14.2010
Outline
Model
Spherical coordinates:Epsilon=-0.5 Check Epsilon=-0.5
Quasi Static Approximation
Cylindrical Coordinates
Model
A single shell with E
psilon
a static electric field
a plane wave
r
2R
=
Spherical Coordinate
TMM2
( ) cosll l
dc r
r
3301
21
2 1 1(1 )(1 ) (1 2 )(1 ) 0
9 2 9r rr r
RRT
0.5r
3302
3302
2 1 2 12 2 (1 ) (1 )(1 ) (1 )3 2 33 2 3
1 1 21 (1 ) (1 )(1 ) (1 2 )3 33 3
rr
r l rl
llr r
r r
R cc R
dd RR
1
0
tTr
21
22
Tr
T
Drude Model+Mie Theory
2
2( ) 1 pr
ww
w
296nm e= -0.13
254nm e= -0.53
20nm:24nm
Quasi Static Approximation
2R
=
10nm:12nm Epsilon=-0.5
Quasi Static ApproximationR ( nm ) Wavelength (nm)
12 370 4.91
24 880 5.84
36 1460 6.45
48 2080 6.90
60 2750 7.29
72 3460 7.65
84 4190 7.94
96 4950 8.21
108 5740 8.46
120 6540 8.67
180 10860 9.60
240 15560 10.32
600 48910 12.97
1200 116340 15.43
2 R
~20
2R
=
Cylindrical Coordinates
5000Hz , R 0.2 m: 0.4mEpsilon=-2
Cylindrical Coordinates
TMM
( ) cosll l
dc r
r
3 321 1 0
1 1( ) (2 )r r
r r
T R R
Summary
Shell Epsilon=-0.5
Quasi Static Approximation
Nanoscale: ~ 20
Thanks!