Nonlinear optical and optical power limiting studies on a new thiophene-based conjugated polymer in solution and solid PMMA matrix
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Date
2010
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Abstract
An experimental investigation of the third-order nonlinear optical properties of new poly{2-{5-[3,4-ditetradecyloxy-5-(1,3,4-oxadiazol-2-yl)thiophen-2-yl]-1,3,4-oxadiazol-2-yl}pyridine} (P) in tetrahydrofuran (THF) solution and in solid poly(methylmethacrylate) (PMMA) matrix, by Z-scan technique is reported. The Z-scan traces reveal that the composite films exhibit large negative nonlinear refractive index of the order 10-10 esu. The excited-state absorption cross-section was found to be larger than the ground-state absorption indicating that the operating nonlinear process is reverse saturable absorption (RSA). The new polymer P exhibits good optical power limiting properties in the nanosecond regime in solution and as well in solid PMMA matrix. © 2009 Elsevier Ltd. All rights reserved.
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Keywords
Based conjugated polymers, Excited state absorption, Experimental investigations, Ground state absorption, matrix, Non-linear optical, Nonlinear process, Nonlinear refractive index, Optical power limiting, PMMA matrices, Poly(methyl methacrylate), Reverse saturable absorption, Reverse saturable absorption (RSA), Tetrahydrofurans, Third order nonlinear optical properties, Z-scan, Z-scan technique, Z-scan traces, Absorption, Composite films, Light transmission, Optical materials, Organic polymers, Refractive index, Solid solutions, Thiophene, Nonlinear optics
Citation
Optics and Laser Technology, 2010, 42, 1, pp. 230-236