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Optical Spectroscopy of PPV-Based Block Copolymers of Nanostructured Supramolecular Organic Semiconductor

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The third-order nonlinearity of a PPV-based nanostructured supramolecular organic semiconductor (DBAB), with an electron donor (D) connected to an electron acceptor (A) via nonconjugated and flexible bridge (B) units, was investigated in this work at both near-resonant (532 nm) and nonresonant (1064 nm) wavelength by using degenerate four-wave mixing. The second hyperpolarizabilities of D, A, and DBAB at 532 nm were found to be ∼2.42 × 10−43 m2/V2, 7.75 × 10−44 m2/V2, and 1.80 × 10−43 m2/V2 in copolarization geometry, and ∼1.59 × 10−43 m2/V2, 2.59 × 10−44 m2/V2, and 1.18 × 10−43 m2/V2 in orthogonal polarization geometry, respectively. The second hyperpolarizabilities of DBAB at 1064 nm were ∼1.66 × 10−46 m2/V2 and ∼8.77 × 10−47 m2/V2 for parallel and orthogonal polarization cases.
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Document Type: Research Article

Publication date: February 1, 2009

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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