The Universal Cross-Section of Photonic Interaction

Richard A. Hutchin^*

Optical Physics Company, Calabasas, USA.

DOI: 10.4236/opj.2015.55016                

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.

Keywords

Photonic Cross-Section, Stimulated Emission, Excitation

Conflicts of Interest

The authors declare no conflicts of interest.

References

[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.