DEPHASING DYNAMICS OF THE VIBRONIC STATES OF EPITAXIAL POLYDIACETYLENE FILMS

被引:56
作者
PHAM, TA [1 ]
DAUNOIS, A [1 ]
MERLE, JC [1 ]
LEMOIGNE, J [1 ]
BIGOT, JY [1 ]
机构
[1] INST PHYS & CHIM MAT STRASBOURG,MAT ORGAN GRP,EHICS,ULP,CNRS,UNITE MIXTE 380046,F-67037 STRASBOURG,FRANCE
关键词
D O I
10.1103/PhysRevLett.74.904
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The dynamics of polydiacetylene (pDCH) vibronic states has been measured with photon echoes and pump probe techniques using femtosecond optical pulses. The excitonic dephasing (52 fs) is shown to be dominated by interactions between excitons and the vibration modes of the polymer chain. The importance of the C=C double bonds compared to the C= C triple bonds shows up both in the dephasing and early population dynamics. These results sugest that just after excitation the polydiacetylene backbone undertakes a transient structural change with a butatrieniclike distribution of the electronic states. © 1995 The American Physical Society.
引用
收藏
页码:904 / 907
页数:4
相关论文
共 24 条
[1]   DELOCALIZATION AND SUPERALTERNATION EFFECTS IN NONLINEAR SUSCEPTIBILITIES OF ONE-DIMENSIONAL SYSTEMS [J].
AGRAWAL, GP ;
FLYTZANIS, C .
CHEMICAL PHYSICS LETTERS, 1976, 44 (02) :366-370
[2]   FEMTOSECOND PHOTON-ECHOES FROM MOLECULES IN SOLUTION [J].
BECKER, PC ;
FRAGNITO, HL ;
BIGOT, JY ;
CRUZ, CHB ;
FORK, RL ;
SHANK, CV .
PHYSICAL REVIEW LETTERS, 1989, 63 (05) :505-507
[3]   NON-MARKOVIAN DEPHASING OF MOLECULES IN SOLUTION MEASURED WITH 3-PULSE FEMTOSECOND PHOTON-ECHOES [J].
BIGOT, JY ;
PORTELLA, MT ;
SCHOENLEIN, RW ;
BARDEEN, CJ ;
MIGUS, A ;
SHANK, CV .
PHYSICAL REVIEW LETTERS, 1991, 66 (09) :1138-1141
[4]   EXCITONIC AND PHONON-MEDIATED OPTICAL STARK EFFECTS IN A CONJUGATED POLYMER [J].
BLANCHARD, GJ ;
HERITAGE, JP ;
VONLEHMEN, AC ;
KELLY, MK ;
BAKER, GL ;
ETEMAD, S .
PHYSICAL REVIEW LETTERS, 1989, 63 (08) :887-890
[5]   FEMTOSECOND PUMP-PROBE SPECTROSCOPY OF CONJUGATED POLYMERS - COHERENT AND SEQUENTIAL CONTRIBUTIONS [J].
BOSMA, WB ;
MUKAMEL, S ;
GREENE, BI ;
SCHMITTRINK, S .
PHYSICAL REVIEW LETTERS, 1992, 68 (16) :2456-2459
[6]   NONLINEAR OPTICAL PROCESSES IN A POLYDIACETYLENE MEASURED WITH FEMTOSECOND DURATION LASER-PULSES [J].
CARTER, GM ;
HRYNIEWICZ, JV ;
THAKUR, MK ;
CHEN, YJ ;
MEYLER, SE .
APPLIED PHYSICS LETTERS, 1986, 49 (16) :998-1000
[7]   TIME-RESOLVED VIBRATIONAL SPECTROSCOPY IN THE IMPULSIVE LIMIT [J].
DHAR, L ;
ROGERS, JA ;
NELSON, KA .
CHEMICAL REVIEWS, 1994, 94 (01) :157-193
[8]   COMPRESSION OF OPTICAL PULSES TO 6 FEMTOSECONDS BY USING CUBIC PHASE COMPENSATION [J].
FORK, RL ;
CRUZ, CHB ;
BECKER, PC ;
SHANK, CV .
OPTICS LETTERS, 1987, 12 (07) :483-485
[9]   PICOSECOND RELAXATION DYNAMICS IN POLYDIACETYLENE-PTS [J].
GREENE, BI ;
ORENSTEIN, J ;
MILLARD, RR ;
WILLIAMS, LR .
CHEMICAL PHYSICS LETTERS, 1987, 139 (05) :381-385
[10]   PHONON-MEDIATED OPTICAL NONLINEARITY IN POLYDIACETYLENE [J].
GREENE, BI ;
MUELLER, JF ;
ORENSTEIN, J ;
RAPKINE, DH ;
SCHMITTRINK, S ;
THAKUR, M .
PHYSICAL REVIEW LETTERS, 1988, 61 (03) :325-328