Two-dimensional spectral interpretation of time-dependent absorption near laser-coupled resonances

被引：30

作者：

Blaettermann, Alexander ^{[1
]}

Ott, Christian ^{[1
]}

Kaldun, Andreas ^{[1
]}

Ding, Thomas ^{[1
]}

Pfeifer, Thomas ^{[1
]}

机构：

[1] Max Planck Inst Nucl Phys, Heidelberg, Germany

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 2014年 / 47卷 / 12期

关键词：

absorption spectroscopy; spectroscopic methods; laser-atom interaction; DOUBLE-EXCITATION STATES; AUTOIONIZING STATES; SPECTROSCOPY;

D O I：

10.1088/0953-4075/47/12/124008

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We demonstrate a two-dimensional time-domain spectroscopy method to extract amplitude and phase modifications of excited atomic states caused by the interaction with ultrashort laser pulses. The technique is based on Fourier analysis of the absorption spectrum of perturbed polarization decay. An analytical description of the method reveals how amplitude and phase information can be directly obtained from measurements. We apply the method experimentally to the helium atom, which is excited by attosecond-pulsed extreme ultraviolet light, to characterize laser-induced couplings of doubly excited states.

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页数：7

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