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NCUEIR > College of Science > Department of Physics > Periodical Articles > Item 987654321/16744

Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/16744

Title:	Low-Lying Two-Photon Excitations in Poly(p-phenylene Vinylene) and Its Derivatives
Authors:	Guo, Fang-Yeong;Shih, Z. Y.
Contributors:	物理學系
Date:	2003-03
Issue Date:	2013-06-05T07:49:09Z
Publisher:	Elsevier
Abstract:	We study the low-lying two-photon excited states in nonlinear optical processes in poly(p-phenylene vinylene) (PPV) and its derivatives. We find that, within the Pariser–Parr–Pople (PPP) model, the mAg state in (unsubstituted) PPV is exactly the lowest two-photon excited state (i.e., the state). Due to the breaking of charge-conjugation symmetry, the 2Ag in substituted PPVs, originating from the , is weakly two-photon allowed, while the mAg has its origin from the , hence giving a strong peak in the two-photon absorption spectra.
Relation:	Chemical Physics Letters, 370(3-4): 572-577
Appears in Collections:	[Department of Physics] Periodical Articles

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