Fluorescence detected coherent phenomena on single triplet-state molecules

被引：0

作者：

Kilin, SY ^{[1
]}

Nizovtsev, AP ^{[1
]}

Berman, PR ^{[1
]}

Wrachtrup, J ^{[1
]}

von Borczyskowski, C ^{[1
]}

机构：

[1] Byelarussian Acad Sci, Inst Phys, Minsk 220602, BELARUS

来源：

11TH INTERNATIONAL VAVILOV CONFERENCE ON NONLINEAR OPTICS | 1998年 / 3485卷

关键词：

D O I：

10.1117/12.328223

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Fluorescence detected magnetic resonance(FDMR) coherent phenomena on single triplet-state chromophore guest molecule in low-temperature organic host matrix are analyzed within the stochastic approach to describe triplet electron spin dephasing due to frequency fluctuations U-t induced by host-matrix proton spins dynamics. Exact equations for density matrix of a molecule averaged over histories of the fluctuations U-t are constructed using the model of N random telegraph process. The equations are applied to calculate FDMR responses of a molecule to cw/pulsed MW field and to describe a wide range of available experimental data on (i) the power-broadened FDMR line shapes, (ii) the FDMR nutations, (iii) the FDMR Hahn echo for pentacene+p-terphenyl pair supposing the fluctuations U-t to be slow. The failure of the standard Bloch equations for this system is demonstrated and the effects of microwaves-suppressed dephasing are discussed.

引用

页码：98 / 109

页数：12