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2<br />
⎛ρ<br />
2<br />
2 ⎞<br />
0<br />
∞ − s ( n 1/2)<br />
2<br />
0 nn ( 1) i<br />
⎜ + + ⎟<br />
⎛ + ⎞<br />
ω0<br />
gnTE<br />
= ∑ sen 0e ⎝<br />
⎠<br />
⎜<br />
ϕ<br />
I1( Q)<br />
n=<br />
1<br />
n + 1/2<br />
⎟<br />
(3. 190)<br />
⎝ ⎠<br />
os<br />
2<br />
m 1 ⎛ρ<br />
2<br />
2 ⎞<br />
0<br />
∞ i<br />
−<br />
0<br />
s ( n 1/2)<br />
2<br />
m 1⎛<br />
∓ ϕ − + +<br />
± −ie<br />
⎞ ⎜ ⎟<br />
0 2i<br />
0<br />
gnTE e<br />
⎝ω<br />
⎠⎡<br />
∓ ϕ<br />
= ∑<br />
Im− 1( Q) −e Im+<br />
1( Q)<br />
⎤ (3. 191)<br />
nm , = 1<br />
i ⎜n+<br />
1/2⎟ ⎣ ⎦<br />
⎝ ⎠<br />
No caso particular <strong>em</strong> que o foco se desloca ape<strong>na</strong>s <strong>na</strong> direção x,<br />
0 0<br />
m<br />
g n ’s são <strong>da</strong>dos por:<br />
2<br />
⎛ρ<br />
2<br />
2 ⎞<br />
0<br />
∞ − s ( n 1/2)<br />
2<br />
0 nn ( 1) i<br />
⎜ + + ⎟<br />
⎛ + ⎞ ω0<br />
gnTM<br />
= ∑ e ⎝<br />
⎠<br />
⎜ I1<br />
( Q)<br />
n=<br />
1<br />
n + 1/2<br />
⎟<br />
⎝ ⎠<br />
(3. 192)<br />
ϕ = e ρ 0 = x0,<br />
2<br />
m 1 ⎛ρ<br />
2<br />
2 ⎞<br />
0<br />
∞ i<br />
−<br />
0<br />
s ( n 1/2)<br />
2<br />
m<br />
⎛<br />
∓ ϕ − + +<br />
−ie<br />
⎞ ⎜ ⎟<br />
ω0<br />
gnTM = e<br />
⎝<br />
⎠<br />
∑<br />
⎡Im− 1( Q) Im+<br />
1( Q)<br />
⎤<br />
⎜ +<br />
nm , = 1<br />
n + 1/2⎟ ⎣ ⎦<br />
⎝ ⎠<br />
(3. 193)<br />
0<br />
nTE<br />
g = 0 (3. 194)<br />
2<br />
m 1 ⎛ρ<br />
2<br />
2 ⎞<br />
0<br />
∞ i<br />
−<br />
0<br />
s ( n 1/2)<br />
2<br />
m 1⎛<br />
∓ ϕ − + +<br />
± −ie<br />
⎞ ⎜ ⎟<br />
ω0<br />
gnTE = e<br />
⎝<br />
⎠<br />
∑<br />
⎡Im− 1( Q) −Im+<br />
1( Q)<br />
⎤<br />
nm , = 1<br />
i ⎜n+<br />
1/2⎟ ⎣ ⎦<br />
⎝ ⎠<br />
(3. 195)<br />
Já para deslocamentos ao longo do eixo y, ϕ π<br />
0 = e<br />
2<br />
ρ 0 = y0:<br />
0<br />
nTM<br />
g = 0 (3. 196)<br />
2<br />
m 1 ⎛ρ<br />
2<br />
2 ⎞<br />
0<br />
∞ i<br />
−<br />
0<br />
s ( n 1/2)<br />
2<br />
m<br />
⎛<br />
∓ ϕ − + +<br />
−ie<br />
⎞ ⎜ ⎟<br />
ω0<br />
gnTM = e<br />
⎝<br />
⎠<br />
∑<br />
⎡Im− 1( Q) Im+<br />
1( Q)<br />
⎤<br />
⎜ −<br />
nm , = 1<br />
n + 1/2⎟ ⎣ ⎦<br />
⎝ ⎠<br />
(3. 197)”<br />
2<br />
⎛ ρ 2<br />
2 ⎞<br />
0<br />
∞ − s ( n 1/2)<br />
2<br />
0 nn ( 1) i<br />
⎜ + + ⎟<br />
⎛ + ⎞ ω0<br />
gnTE<br />
= ∑ e ⎝<br />
⎠<br />
⎜ I1<br />
( Q)<br />
n=<br />
1<br />
n + 1/2<br />
⎟<br />
(3. 198)<br />
⎝ ⎠<br />
2<br />
m 1 ⎛ρ<br />
2<br />
2 ⎞<br />
0<br />
∞ i<br />
−<br />
0<br />
s ( n 1/2)<br />
2<br />
m 1⎛<br />
∓ ϕ − + +<br />
± −ie<br />
⎞ ⎜ ⎟<br />
ω0<br />
gnTE = e<br />
⎝<br />
⎠<br />
∑<br />
⎡Im− 1( Q) + Im+<br />
1( Q)<br />
⎤<br />
nm , = 1<br />
i ⎜n+<br />
1/2⎟ ⎣ ⎦<br />
⎝ ⎠<br />
(3. 199)<br />
Com os coeficientes g’s t<strong>em</strong>os a expansão dos campos elétrico e magnético <strong>em</strong><br />
on<strong>da</strong>s parciais:<br />
<br />
E ( g M ig N )<br />
∞<br />
n 1 n 1<br />
i = ∑ mTE omn − mTM <strong>em</strong>n<br />
nm ,<br />
<br />
( ) (3. 200)<br />
∞<br />
k<br />
e<br />
n 1 n 1<br />
Hi =− ∑ gmTMM<strong>em</strong>n + igmTENomn<br />
µω<br />
nm ,<br />
116