Mapping the evolution of optically generated rotational wave packets in a room-temperature ensemble of D2

被引：20

作者：

Bryan, W. A.

English, E. M. L.

McKenna, J.

Wood, J.

Calvert, C. R.

Turcu, I. C. E.

Torres, R.

Collier, J. L.

Williams, I. D.

Newell, W. R.

机构：

[1] UCL, Dept Phys & Astron, London WC1E 6BT, England

[2] Queens Univ Belfast, Dept Pure & Appl Phys, Belfast BT7 1NN, Antrim, North Ireland

[3] Rutherford Appleton Lab, Cent Laser Facil, Didcot OX11 0QX, Oxon, England

[4] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BW, England

来源：

PHYSICAL REVIEW A | 2007年 / 76卷 / 02期

关键词：

D O I：

10.1103/PhysRevA.76.023414

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A coherent superposition of rotational states in D-2 has been excited by nonresonant, ultrafast (12 fs), intense (2x10(14) W cm(-2)) 800 nm laser pulses, leading to impulsive dynamic alignment. Field-free evolution of this rotational wave packet has been mapped to high temporal resolution by a time-delayed pulse, initiating rapid double ionization, which is highly sensitive to the angle of orientation of the molecular axis with respect to the polarization direction, theta. The detailed fractional revivals of the neutral D-2 wave packet as a function of theta and evolution time have been observed and modeled theoretically.

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页数：4

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