ULTRAFAST RELAXATION AND MODULATION IN THE OXAZINE DYE NILE BLUE

被引：14

作者：

MOSHARY, F ^{[1
]}

AREND, M ^{[1
]}

FRIEDBERG, R ^{[1
]}

HARTMANN, SR ^{[1
]}

机构：

[1] COLUMBIA UNIV, DEPT PHYS, NEW YORK, NY 10027 USA

来源：

PHYSICAL REVIEW A | 1992年 / 46卷 / 01期

关键词：

D O I：

10.1103/PhysRevA.46.R33

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Time-delayed four-wave mixing, using incoherent laser pulses 5 ns long and 350 angstrom wide, has been used to measure the optical phase relaxation of a large molecule (nile blue) in solution at 300 and 4.5 K. In the latter case an asymmetric response as well as a quantum beat (signaling a vibronic mode at 583 cm-1) is observed. Its magnitude and shape gives its electron-vibron coupling factor S = 0.79 together with the homogeneous relaxation time T2 = 43.7 fs and the inhomogeneous relaxation time T2* = 13.3 fs (full width of 940 cm-1). Supporting evidence for the large value of S is presented.

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收藏

页码：R33 / R36

页数：4

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