Influence of propagation and external phase in sequential two-photon absorption of femtosecond pulses

被引：5

作者：

Barros, HG ^{[1
]}

Lozano, B ^{[1
]}

Vianna, SS ^{[1
]}

Acioli, LH ^{[1
]}

机构：

[1] Univ Fed Pernambuco, Dept Fis, BR-5067901 Recife, PE, Brazil

来源：

OPTICS LETTERS | 2005年 / 30卷 / 22期

关键词：

D O I：

10.1364/OL.30.003081

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We study the influence of shaping the phase of the optical field when time-delayed femtosecond pulse pairs excite a sequential two-photon transition in rubidium atoms. Propagation through this optically dense medium modifies the pulse profile. When an external phase is introduced into one of the pulses, partial cancellation of the two-photon absorption signal is observed for temporal delays much greater than the pulse duration. This behavior is qualitatively explained in terms of a negative group delay. (c) 2005 Optical Society of America.

引用

页码：3081 / 3083

页数：3

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