Femtosecond Z-scan Measurement of the Third Order Nonlinear Optical Coefficient of CuPc Thin Film

The third order nonlinear refractive index and absorption coefficient of copper-phthalocyanine (CuPc) thin film were measured by Z-scan method in ultrafast time regime. By changing pulse separation, we found that the nonlinear absorption behavior is different for the different pulse repetition rate....

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Bibliographic Details
Published inMolecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals Vol. 370; no. 1; pp. 127 - 130
Main Authors Chang, Hye-Jeong, Shin, Min-Joo, Wu, J. W.
Format Journal Article Conference Proceeding
LanguageEnglish
Published Philadelphia, PA Taylor & Francis Group 01.10.2001
Gordon and Breach
Subjects
CuPc
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Nonlinear optics
Optical susceptibility, hyperpolarizability
Optics
Physics
third order nonlinear coefficient
Z-scan
Thin films
Refractive index measurement
Transition element complexes
Metallophthalocyanine
Nitrogen heterocycle
Optical properties
fs range
Absorption coefficients
Nonlinear optics
Z scan
Copper complexes
Macrocycle
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Summary:The third order nonlinear refractive index and absorption coefficient of copper-phthalocyanine (CuPc) thin film were measured by Z-scan method in ultrafast time regime. By changing pulse separation, we found that the nonlinear absorption behavior is different for the different pulse repetition rate. At 4MHz, the film exhibits RSA (reverse saturable absorption), while at 800kHz and 400kHz it shows SA (saturable absorption). Also the nonlinear refractive index is found to be different at 4MHz and other repetition rates.
ISSN:1058-725X
DOI:10.1080/10587250108030053