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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 />

等离子体是电中性的(ρ = 0),由麦克斯韦方程得:<br />

2<br />

2 ω σ<br />

k i ω<br />

2 2<br />

c ε0c<br />

− + + =<br />

k<br />

ω<br />

1<br />

= ( ω −ω<br />

)<br />

c<br />

2 2 2<br />

2<br />

p<br />

2<br />

p<br />

=<br />

2<br />

ne e<br />

ε m<br />

0<br />

其中等离子体的ε、μ近似为ε 0 、μ 0<br />

0<br />

ω p 称为等离子体频率

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