Weak exciton scattering in molecular nanotubes revealed by double-quantum two-dimensional electronic spectroscopy.
Weak exciton scattering in molecular nanotubes revealed by double-quantum two-dimensional electronic spectroscopy.
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双量子二维电子光谱揭示分子纳米管中的弱激子散射。
DOI：
10.1103/physrevlett.108.067401
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发表时间：
2012
影响因子：
8.6
通讯作者：
Kauffmann,HaraldF
中科院分区：
文献类型：
--
作者：
Abramavicius,Darius;Nemeth,Alexandra;Milota,Franz;Sperling,Jaroslaw;Mukamel,Shaul;Kauffmann,HaraldF
用相干三阶光学方法研究了双壁圆柱形分子聚集体的双激子流形。实验揭示了激子带的非简谐性质。激子-激子散射的原子模拟表明，激子可以被视为弱耦合硬核玻色子。弱耦合源于纳米管几何形状使扩展的激子离域成为可能。
The two-exciton manifold of a double-wall cylindrical molecular aggregate is studied using a coherent third order optical technique. Experiments reveal the anharmonic character of the exciton bands. Atomistic simulations of the exciton-exciton scattering show that the excitons can be treated as weakly coupled hard-core bosons. The weak coupling stems from the extended exciton delocalization made possible by the nanotube geometry.