Two Photon Spectroscopy of Dipole Forbidden Transitions III. Experimental Determination of Two Photon Absorption Spectra Including Polarization Control | Zendy

Dick B. | Zendy; Gonska H. | Zendy; Hohlneicher G. | Zendy

Open Access

Two Photon Spectroscopy of Dipole Forbidden Transitions III. Experimental Determination of Two Photon Absorption Spectra Including Polarization Control

Author(s) -

Dick B.,

Gonska H.,

Hohlneicher G.

Publication year - 1981

Publication title -

berichte der bunsengesellschaft für physikalische chemie

Language(s) - English

Resource type - Journals

ISSN - 0005-9021

DOI - 10.1002/bbpc.19810850805

Subject(s) - polarization (electrochemistry) , photon , spectral line , two photon absorption , dipole , absorption spectroscopy , spectroscopy , absorption (acoustics) , laser , atomic physics , two photon excitation microscopy , chemistry , optics , molecular physics , physics , quantum mechanics , organic chemistry , fluorescence

A new experimental technique is described which allows the measurement of two‐photon absorption spectra of luminescent molecules and simultaneously the evaluation of the two‐photon polarization parameter Ω over a wide spectral range. The resolution obtained is comparable to conventional UV absorption and polarization spectra. Examples are shown for different types of unsaturated hydrocarbons. The influence of S 1 → S m excitations and of variations of the profile of the exciting laser pulse are discussed. It is shown that careful control of both the quadratic nature of the two‐photon process and the beam profile is essential to avoid artificial features in wide range two‐photon spectra.

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