Two-photon absorption and nonlinear optical properties of a new organic dye PSPI |
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Authors: | Guangyong Zhou Xiaomei Wang Dong Wang Chun Wang Zongshu Shao Qi Fang Minhua Jiang |
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Institution: | State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan 250100, People's Republic of China |
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Abstract: | Trans-4-p-(pyrrolidinyl)styryl]-N-methylpyridinium iodide (abbreviated as PSPI thereafter) is a two-photon absorption (TPA) dye newly synthesized by our research group. It possesses much larger TPA cross-section and much stronger upconversion fluorescence emission than those of common organic dye (such as rhodamine) when excited with near infrared (IR) radiation. TPA spectrum and upconversion efficiency spectrum of HEASPI solution at various wavelengths were measured. There is 34 nm blue shift for the central wavelength of the TPA induced absorption peak compared with two times of the linear absorption peak. The biggest molecular TPA cross-section σ2′ is 2.85×10−47 cm4 s/photon at 930 nm. At 1064 nm, σ2′ is 3.12×10−48 cm4 s/photon. The highest efficiency is 3.9% at 1010 nm, whereas 2.9% at 1064 nm. Its optical power limiting properties at 930 nm have also been illustrated. |
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Keywords: | Two-photon absorption Frequency upconversion Organic dye |
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