Two-photon probe of forbidden exciton states in symmetric aggregates of asymmetric molecules

被引：18

作者：

Abe, S ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, AIST, Electrotech Lab, Tsukuba, Ibaraki 3058568, Japan

来源：

CHEMICAL PHYSICS | 2001年 / 264卷 / 03期

关键词：

D O I：

10.1016/S0301-0104(01)00258-0

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Two-photon absorption (TPA) spectra of molecular aggregates are calculated for asymmetric molecules with a difference static dipole between the ground and excited states. If the molecules are aligned symmetrically such that their difference static dipoles cancel out as a whole, some of dipole-forbidden exciton states are two-photon allowed. This effect is important not only for probing forbidden excitons as well as for resonance enhancement of optical nonlinearity. Examples of dimers, and linear and circular aggregates are discussed. As an interesting application, the TPA spectrum is calculated for circular light-harvesting antenna complexes in photosynthetic bacteria. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：355 / 363

页数：9

共 22 条

[1]

Abe S., 2000, Nonlinear Optics, Principles, Materials, Phenomena, and Devices, V26, P161

[2]

Boyd R. W., 2003, NONLINEAR OPTICS

[3]

Davydov A.S., 1971, THEORY MOL EXCITONS

[4] EXCITONIC N-STRING IN LINEAR-CHAINS [J].

EZAKI, H ;

KUWATA-GONOKAMI, M ;

SHIMANO, R ;

EMA, K ;

HANAMURA, E ;

FLUEGEL, B ;

MEISSNER, K ;

MAZUMDAR, S ;

PEYGHAMBARIAN, N .

SOLID STATE COMMUNICATIONS, 1993, 88 (03) :211-216

[5]

Gouterman M., 1978, PORPHYRINS, P1, DOI DOI 10.1016/B978-0-12-220103-5.50008-8

[6] CONFORMATIONAL AND ENVIRONMENTAL-EFFECTS ON BACTERIOCHLOROPHYLL OPTICAL-SPECTRA - CORRELATIONS OF CALCULATED SPECTRA WITH STRUCTURAL RESULTS [J].

GUDOWSKANOWAK, E ;

NEWTON, MD ;

FAJER, J .

JOURNAL OF PHYSICAL CHEMISTRY, 1990, 94 (15) :5795-5801

[7] Pigment organization and transfer of electronic excitation in the photosynthetic unit of purple bacteria [J].

Hu, XC ;

Ritz, T ;

Damjanovic, A ;

Schulten, K .

JOURNAL OF PHYSICAL CHEMISTRY B, 1997, 101 (19) :3854-3871

[8] How nature harvests sunlight [J].

Hu, XC ;

Schulten, K .

PHYSICS TODAY, 1997, 50 (08) :28-34

[9] ENERGY TRANSFER MECHANISMS AND MOLECULAR EXCITON MODEL FOR MOLECULAR AGGREGATES [J].

KASHA, M .

RADIATION RESEARCH, 1963, 20 (01) :55-&

[10]

Kobayashi T., 1996, J-Aggregates, DOI DOI 10.1142/3168

← 1 2 3 →