OPJ  Vol.5 No.5 , May 2015
The Universal Cross-Section of Photonic Interaction
Abstract: 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.
Cite this paper: Hutchin, R. (2015) The Universal Cross-Section of Photonic Interaction. Optics and Photonics Journal, 5, 173-176. doi: 10.4236/opj.2015.55016.

[1]   Einstein, A. (1917) Zur Quantentheorie der Strahlung (On the Quantum Theory of Radiation). Physika Zeitschrift, 18, 121-128.


[3]   Sharma, A. and Schulman, S.G. (1999) Introduction to Fluorescence Spectroscopy. Wiley Interscience, Hoboken.