Dispersion studies of optical nonlinearity and excited state dynamics in cyclo [4] naphthobipyrroles

被引：17

作者：

Swain, Debasis ^{[1
]}

Anusha, P. T. ^{[1
]}

Sarma, Tridib ^{[2
]}

Panda, Pradeepta K. ^{[1
,2
]}

Rao, S. Venugopal ^{[1
]}

机构：

[1] Univ Hyderabad, ACRHEM, Hyderabad 500046, Andhra Pradesh, India

[2] Univ Hyderabad, Sch Chem, Hyderabad 500046, Andhra Pradesh, India

来源：

CHEMICAL PHYSICS LETTERS | 2013年 / 580卷

关键词：

2-PHOTON ABSORPTION; ALKOXY PHTHALOCYANINES; 3-PHOTON ABSORPTION; FEMTOSECOND; ALKYL; NM; ENHANCEMENT;

D O I：

10.1016/j.cplett.2013.06.049

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Herein we present results from the dispersion studies of nonlinear optical (NLO) properties of three novel cyclo[4]naphthobipyrroles at wavelengths of 600 nm, 640 nm, 680 nm, and 800 nm using picosecond (ps) pulses. NLO coefficients were extracted from Z-scan measurements using similar to 1.5 ps pulses. Large two-photon absorption cross sections in the range of 0.2-5.2 x 10(4) GM and n(2) values of similar to 10(-16) cm(2)/W were recorded for these moieties. The excited state decay dynamics were investigated using degenerate pump-probe experiments with similar to 70 femtosecond pulses near 600 nm. Double exponential fits of the pump-probe data suggested two decay times for all the molecules investigated. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：73 / 77

页数：5