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Third‐order optical nonlinearity of azobenzene side‐chain polymer thin film
Author(s) -
He Tingchao,
Cheng Yongguang,
Wang Changshun,
Jia Tingjian,
Li Pengwei,
Mo Yujun
Publication year - 2007
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200642564
Subject(s) - azobenzene , excitation , materials science , polymer , refractive index , attenuation coefficient , absorption (acoustics) , z scan technique , nonlinear optical , thin film , nonlinear optics , nonlinear system , side chain , molecule , optics , optoelectronics , analytical chemistry (journal) , molecular physics , chemistry , nanotechnology , laser , physics , organic chemistry , composite material , quantum mechanics
This paper reports both the nonlinear refractive index and nonlinear absorption coefficient of an azobenzene side‐chain polymer measured by a single‐beam Z ‐scan technique under 532 nm and 1064 nm excitation. Experimental results at 532 nm excitation show large optical nonlinearity and nonlinear absorption coefficient induced by the trans–cis transition in the dye molecule with γ being –9.46 × 10 –12 cm 2 /W with β = –285.29 cm/GW, respectively. Under 1064 nm excitation, the large nonlinearity induced by the nonresonant electronic effect with γ = 4.57 × 10 –12 cm 2 /W is obtained. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)