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- W1993679962 abstract "Observations have been made of the two-photon excitation of an electron from the valence to the conduction band in CdS (${E}_{g}=2.5$ eV) using a pulsed ruby laser ($ensuremath{hbar}ensuremath{omega}=1.78$ eV). The radiative recombination emission from exciton and impurity levels subsequent to the simultaneous absorption of two quanta of $ensuremath{hbar}ensuremath{omega}=1.78$ eV was observed as a function of laser intensity and compared to the emission excited by single-quanta absorption for photons of $ensuremath{hbar}ensuremath{omega}>{E}_{g}$. It was found that the intensity of the recombination radiation is proportional to ${{I}_{0}}^{n}$ for single-quanta excitation and ${{I}_{0}}^{2n}$ for double-quanta excitation, where ${I}_{0}$ is the excitation intensity and $n$ is a constant which differs for different groups of emission lines. The observed cross section for double-quanta excitation is compared with theory utilizing the band parameters of CdS." @default.
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- W1993679962 date "1964-04-20" @default.
- W1993679962 modified "2023-09-30" @default.
- W1993679962 title "Optical Double-Photon Absorption in CdS" @default.
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- W1993679962 doi "https://doi.org/10.1103/physrev.134.a499" @default.
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