Dynamics of higher photoexcited states in m-LPPP probed with sub-20 fs time resolution

被引：17

作者：

Gadermaier, C

Cerullo, G

Manzoni, C

Scherf, U

List, EJW

Lanzani, G

机构：

[1] Graz Tech Univ, Inst Festkorperphys, Christian Doppler Lab Adv Funct Mat, A-8010 Graz, Austria

[2] Berg Univ Gesamthsch Wuppertal, Dept Chem, D-42097 Wuppertal, Germany

[3] Politecn Milan, Dipartimento Fis, INFM, I-20133 Milan, Italy

[4] Politecn Milan, Natl Lab Ultrafast & Ultraintense Opt Sci, I-20133 Milan, Italy

[5] Inst Nanostructured Mat & Photon, A-8160 Weiz, Austria

来源：

CHEMICAL PHYSICS LETTERS | 2004年 / 384卷 / 4-6期

关键词：

D O I：

10.1016/j.cplett.2003.11.092

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：

We study the enhanced charge generation from higher excited states in a conjugated polymer via a modification of transient differential transmission spectroscopy. The first excited state S-1 is reexcited via a second laser pulse towards a higher state S-n The relaxation dynamics of S, as well as the kinetics of the states created from S-n is revealed by a broad-band probe pulse. The push and probe durations below 20 fs allow the time-resolution of the S-n relaxation and enables us to identify the two main contributions to enhanced charge generation from S-n, energy migration and vibrational relaxation. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：251 / 255

页数：5

共 21 条

[1] Design of organic molecules with large two-photon absorption cross sections [J].