OPJ  Vol.5 No.5 , May 2015
The Universal Cross-Section of Photonic Interaction
Author(s) Richard A. Hutchin*
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.

[2]   www.pci.tu-bs.de/aggericke/PC4e/Kap_III/Linienbreite.htm

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