LOCATION OF THE LOW-ENERGY AG-1 STATE IN A POLYTHIOPHENE OLIGOMER BY 2-PHOTON ABSORPTION-SPECTROSCOPY - ALPHA-SEXITHIENYL

被引：97

作者：

PERIASAMY, N ^{[1
]}

DANIELI, R ^{[1
]}

RUANI, G ^{[1
]}

ZAMBONI, R ^{[1
]}

TALIANI, C ^{[1
]}

机构：

[1] TATA INST FUNDAMENTAL RES, BOMBAY 400005, INDIA

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 68卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.68.919

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The two-photon excitation spectrum in polycrystalline alpha-sexithienyl (T6) thin film has been investigated at 4.2 K in the spectral range between 910 and 1180 nm of the fundamental laser radiation. The intense two-photon absorption band at 18350 cm-1 is assigned to the 2(1)A(g) exciton band origin. The comparison of the one-photon and two-photon excitation spectra shows that the lowest "gerade" exciton level lies at 898 cm-1 above the lowest one-photon-allowed 1(1)B(u) exciton level.

引用

页码：919 / 922

页数：4

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[1] THEORETICAL INVESTIGATION OF THE RELAXED GEOMETRY IN THE 1ST SINGLET BU EXCITED-STATE OF POLYACETYLENE OLIGOMERS [J].