ROLES OF BAND STATES AND 2-PHOTON TRANSITIONS IN THE ELECTROABSORPTION OF A POLYDIACETYLENE

被引:41
作者
KAWABE, Y
JARKA, F
PEYGAMBARIAN, N
GUO, D
MAZUMDAR, S
DIXIT, SN
KAJZAR, F
机构
[1] UNIV ARIZONA,DEPT PHYS,TUCSON,AZ 85721
[2] UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550
[3] IDEMITSU KOSAN CO LTD,CENT RES LABS,1280 KAMIIZUMI,SODEGAURA,CHIBA 29902,JAPAN
[4] CENS,CEA,INST RECH TECHNOL & DEV IND,PHYS ELECTR MAT LAB,F-91191 GIF SUR YVETTE,FRANCE
来源
PHYSICAL REVIEW B | 1991年 / 44卷 / 12期
关键词
D O I
10.1103/PhysRevB.44.6530
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We report results of experimental and theoretical investigations of electroabsorption (EA) in a poly[1,6-di(N-carbazolyl)-2,4-hexadiyne] DCH polydiacetylene. In addition to the Stark shift of the exciton, a high-energy feature is seen in EA, whose origin has been the subject of controversy. Based on exact theoretical calculation of the EA within an extended Peierls-Hubbard model, we ascribe the high-energy signal to transitions to a continuum threshold. We briefly discuss the contributions of these band threshold states to the third-order optical nonlinearity, chi(3).
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页码:6530 / 6533
页数:4
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