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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 />

分子的电偶极矩<br />

p = qr<br />

单位体积平均电偶极矩(极化强度) P = Np =−Ner<br />

电子受迫振动<br />

入射光场为<br />

电子的运动方程<br />

光场强迫力<br />

ω =<br />

0<br />

2<br />

dr dr<br />

=− − −<br />

2<br />

dt dt<br />

m eE fr g<br />

E Ee ω<br />

=<br />

0<br />

f / m<br />

固有振动频率<br />

i t −<br />

准弹性力<br />

阻尼力<br />

γ =<br />

g/ m<br />

阻尼(衰减)系数<br />

eE e<br />

2<br />

−iωt<br />

dr dr 2 0<br />

+ γ + ω<br />

2<br />

0 r =−<br />

dt dt m

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