现代光电子学（2）
现代光电子学（2）
现代光电子学（2）
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国家自然科学基金委员会<br />
数理学部实验物理讲习班<br />
求z方向的穿透深度:<br />
穿透深度:<br />
2 2 2<br />
2 ⎛ω ⎞ 2 ⎛ω⎞ ⎛ω ⎞ 1<br />
z1 = ε1⎜ ⎟ − x = ε1⎜<br />
⎟ −⎜<br />
⎟<br />
⎝ c ⎠ ⎝ c ⎠ ⎝ ⎠ 1<br />
k k<br />
L<br />
L<br />
z1<br />
z2<br />
⎛ω⎞ = ⎜ ⎟<br />
⎝ c ⎠<br />
2 2<br />
ε1<br />
ε + ε<br />
c ε<br />
εε'<br />
+ ε '<br />
对于Ag,600 nm,L z1 = 390 nm, L z2 = 24 nm<br />
2<br />
1<br />
1 ⎛ω⎞ -ε1−ε ' λ -ε1−ε '<br />
= = ⎜ ⎟ =<br />
k ⎝ c ⎠ ε 2π<br />
ε<br />
z1<br />
1 1<br />
1<br />
= =<br />
k<br />
z2<br />
λ -ε1−ε '<br />
2π −ε'<br />
'
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