Ultrafast excited state dynamics and dispersion studies of nonlinear optical properties in dinaphthoporphycenes

被引：44

作者：

Swain, Debasis ^{[1
]}

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

Prashant, T. Shuvan ^{[1
]}

Tewari, Surya P. ^{[1
]}

Sarma, Tridib ^{[2
]}

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

Rao, S. Venugopal ^{[1
]}

机构：

[1] Univ Hyderabad, Adv Ctr Res High Energy Mat ACRHEM, Hyderabad 500046, Andhra Pradesh, India

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

来源：

APPLIED PHYSICS LETTERS | 2012年 / 100卷 / 14期

关键词：

ALKOXY PHTHALOCYANINES; 3-PHOTON ABSORPTION; 2-PHOTON ABSORPTION; PORPHYCENES; PORPHYRINS; ALKYL; PHOTOPHYSICS; FEMTOSECOND; RELAXATION; NM;

D O I：

10.1063/1.3701274

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Ultrafast excited state dynamics of dinaphthoporphycenes were investigated using femtosecond and picosecond degenerate pump-probe techniques at 600 nm and 800 nm, respectively. Femtosecond pump-probe data indicated photo-induced absorption at 600 nm resulting from two-photon/single photon excitation, whereas picosecond pump-probe data demonstrated photo-bleaching which was a consequence of three-photon absorption. The fastest lifetimes (100-120 fs) observed are attributed to the intramolecular vibrational relaxation, the slower ones (1-3 ps) to internal conversion, and the slowest components (7-10 ps) to non-radiative decay back to ground state. Z-scan studies in the 560-600nm range were also carried out. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3701274]

引用

页数：5

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