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Lock-in phase analysis of copper phthalocyanine photoabsorption spectrum

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Author(s): Michal WOJDYLA | Beata DERKOWSKA | Waclaw BALA

Journal: Optica Applicata
ISSN 0078-5466

Volume: 35;
Issue: 3;
Start page: 561;
Date: 2005;
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Keywords: CuPc | thin layers | photoabsorption | absorption

ABSTRACT
The modulated photoabsorption (PA) spectra in Q-band spectral region of copper phthalocyanine (CuPc) thin layer have been investigated using two-channel lock-in phase resolved technique. Combining measurements in-phase and out-phase we determined four different features, which are observed in PA spectra. A detailed analysis of the in-phase and out-phase multicomponent PA spectra and corresponding phase diagram enabled separation of particular components as well as determination of their phase delay angle and corresponding time constants. In the CuPc sample under study, the various components of PA spectrum show different phase shifts, which implies different mechanism giving rise to the photoinduced electric field modulation.

Tango Jona
Tangokurs Rapperswil-Jona

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