The Universal Cross-Section of Photonic Interaction

• 作者: Richard A. Hutchin
• 来源期刊: 光学与光子学期刊(英文)
• 学科: 医学
• 关键词: PHOTONIC CROSS-SECTION Stimulated EMISSION EXCITATION
• 年，卷（期）: 2015,（5）
• 页码范围: 173-176
• 页数: 4页
• 分类号: R73

摘要

In 1917, Einstein published his paper [1] renowned for the discovery of stimulated emission. However, it also contained the principles which allowed the calculation of the universal photonic cross-section = λ2/2π. Any heavy electronic system will have this cross-section for photonic excitation and stimulated emission in its rest frame. The modifications of this cross-section due to the recoil of the emitter have not yet been calculated, but are in general expected to be second order in recoil velocity.