Energy band-gap dependence of two-photon absorption

We present measurements of the two-photon absorption coefficients beta(2) of 10 different semiconductors having band-gap energies between 1.4 and 3.7 eV. We find that beta(2) varies as E(g)(-3), as predicted by theory. In addition, the absolute values of beta(2) agree with theory, which includes the...

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Veröffentlicht in:	Optics letters 1985-10, Vol.10 (10), p.490-492
Hauptverfasser:	VAN STRYLAND, E. W, WOODALL, M. A, VANHERZEELE, H, SOILEAU, M. J
Format:	Artikel
Sprache:	eng
Schlagworte:	Exact sciences and technology Fundamental areas of phenomenology (including applications) Nonlinear optics Optics Physics
Online-Zugang:	Volltext
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Zusammenfassung:	We present measurements of the two-photon absorption coefficients beta(2) of 10 different semiconductors having band-gap energies between 1.4 and 3.7 eV. We find that beta(2) varies as E(g)(-3), as predicted by theory. In addition, the absolute values of beta(2) agree with theory, which includes the effect of nonparabolic bands, the average difference being less than 26%. This agreement permits confident predictions of two-photon absorption coefficients of other materials at other wavelengths.
ISSN:	0146-9592 1539-4794
DOI:	10.1364/OL.10.000490