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The Universal Cross-Section of Photonic Interaction

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DOI: 10.4236/opj.2015.55016    4,019 Downloads   4,328 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.

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The authors declare no conflicts of interest.

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.

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