粗糙介質(zhì)面對(duì)高斯波束的散射
RESEARCH ON THE SCATTERING OF AN INCIDENT GAUSSIAN BEAM
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摘要: 該文研究了當(dāng)入射場(chǎng)為光波束時(shí)粗糙介質(zhì)面的散射問(wèn)題。利用波束的平面波譜展開(kāi)方法及基爾霍夫近似理論導(dǎo)出了散射場(chǎng)和非相干截面計(jì)算公式,并對(duì)后向非相干截面進(jìn)行了數(shù)值計(jì)算,最后對(duì)其結(jié)果進(jìn)行了分析討論。
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關(guān)鍵詞:
- 波束; 散射截面; 粗糙面散射
Abstract: The problem of scattering of a Gaussian beam by a rough dielectric surface is studied. By using the plane wave spectrum expansion and Kirchhoff approximation theory, the formulas of scattered field and the incoherent scattering cross-section for Gaussian beam illumination of a rough surface are derived. And the numerical results for incoherent back scattering cross-section are given. Finally, the above results are analyzed and discussed. -
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