The Universal Cross-Section of Photonic Interaction
Richard A. Hutchin*
Optical Physics Company, Calabasas, USA.
DOI: 10.4236/opj.2015.55016   PDF    HTML   XML   4,415 Downloads   5,041 Views   Citations


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.

Share and Cite:

Hutchin, R. (2015) The Universal Cross-Section of Photonic Interaction. Optics and Photonics Journal, 5, 173-176. doi: 10.4236/opj.2015.55016.

Conflicts of Interest

The authors declare no conflicts of interest.


[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.

Copyright © 2023 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.