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Indexed by:期刊论文

Date of Publication:2012-01-01

Journal:PLASMA SCIENCE & TECHNOLOGY

Included Journals:SCIE、EI、Scopus

Volume:14

Issue:1

Page Number:5-8

ISSN No.:1009-0630

Key Words:plasma absorption; electromagnetic wave; FDTD

Abstract:A finite difference time domain (FDTD) method is used to numerically study the power absorption of broadband terahertz (0.1 similar to 1.5 THz) electromagnetic waves in a partially ionized uniform plasma layer under low pressure and atmosphere discharge conditions. The power absorption spectra are calculated numerically and the numerical results are in accordance with the analytic results. Meanwhile, the effects on the power absorption are calculated with different applied magnetic fields, collision frequencies and electron number densities, which depend strongly on those parameters. Under the dense strongly magnetized plasma conditions, the absorption gaps appear in the range of 0.3 similar to 0.36 THz, and are enlarged with the increasing electron number density.