Attosecond transient absorption spectroscopy of molecular nitrogen: Vibrational coherences in the b' 1Σ+u state

被引：34

作者：

Warrick, Erika R. ^{[1
,2
]}

Baekhoj, Jens E. ^{[3
]}

Cao, Wei ^{[1
,2
]}

Fidler, Ashley P. ^{[1
,2
]}

Jensen, Frank ^{[4
]}

Madsen, Lars Bojer ^{[3
]}

Leone, Stephen R. ^{[1
,2
,5
]}

Neumark, Daniel M. ^{[1
,2
]}

机构：

[1] Lawrence Berkeley Natl Lab, Chem Sci Div, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA

[3] Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus C, Denmark

[4] Aarhus Univ, Dept Chem, DK-8000 Aarhus C, Denmark

[5] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

来源：

CHEMICAL PHYSICS LETTERS | 2017年 / 683卷

关键词：

WAVE-PACKET; HIGH-RESOLUTION; EXCITED-STATES; DYNAMICS; RYDBERG; TRANSITIONS; GENERATION; PULSES; LIGHT; N-2;

D O I：

10.1016/j.cplett.2017.02.013

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：

Nuclear and electronic dynamics in a wavepacket comprising bound Rydberg and valence electronic states of nitrogen from 12 to 15 eV are investigated using attosecond transient absorption. Vibrational quantum beats with a fundamental period of 50 femtoseconds persist for a picosecond in the b' (1)Sigma(+)(u) valence state. Multi- state calculations show that these coherences result primarily from near infraredinduced coupling between the inner and outer regions of the b' (1)Sigma(+)(u) state potential and the dark a'' (1)Sigma(+)(u) state. The excellent spectral and temporal resolution of this technique allows measurement of the anharmonicity of the b' (1)Sigma(+)(u) potential directly from the observed quantum beats. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：408 / 415

页数：8

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