Introduction to Quantum Electronics and Nonlinear Optics by Vitaliy V. Shtykov & Sergey M. Smolskiy

Author:Vitaliy V. Shtykov & Sergey M. Smolskiy
Language: eng
Format: epub
ISBN: 9783030376147
Publisher: Springer International Publishing

(4.41)

where μ is the mobility of charge carriers in the plasma, through which the average velocity of the charge drift in the field E(v = μE) can be expressed. The collision frequency of the charge carriers in metals and semiconductors is of the order of 1012–1013 s−1. Therefore, (4.41) describes the properties of these materials from DC to the far-infrared ranges.

If ωτ ≫ 1, we can speak about the short-wave (high-frequency) limit. Then

(4.42)

Since ωτ ≫ 1 corresponds to ωτ ≫ ν, plasma under such conditions is often called collisionless plasma. For collisionless plasma,

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