Simultaneous measurements of strong-field ionization and high harmonic generation in aligned molecules

被引：8

作者：

Marceau, C. ^{[1
,2
]}

Bertrand, J. B. ^{[1
,2
]}

Peng, Peng ^{[1
,2
]}

Worner, H. J. ^{[1
,2
,3
]}

Corkum, P. B. ^{[1
,2
]}

Villeneuve, D. M. ^{[1
,2
]}

机构：

[1] CNR, Joint Attosecond Sci Lab, 100 Sussex Dr, Ottawa, ON K1A 0R6, Canada

[2] Univ Ottawa, 100 Sussex Dr, Ottawa, ON K1A 0R6, Canada

[3] Swiss Fed Inst Technol, Lab Phys Chem, Wolfgang Pauli Str 10, CH-8093 Zurich, Switzerland

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 2020年 / 53卷 / 08期

关键词：

ionization yield; high harmonic generation; aligned molecules; DYNAMICS; INTERFEROMETRY;

D O I：

10.1088/1361-6455/ab7643

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

High harmonic spectroscopy relies on high harmonic generation (HHG) in aligned molecules. The first step of HHG is the ionization of the molecule in the intense femtosecond laser field. Here we present measurements of both ionization yield and high harmonic yield as a function of molecular angle in N-2 and CO2 molecules. Measurements were done at two wavelengths, 800 and 1200 nm, and for a range of laser intensities, to study the sensitivity of laser conditions on both processes. The behavior of N-2 was relatively insensitive to laser conditions. However in CO2, a minimum in high harmonic emission was observed that was sensitive to both laser intensity and wavelength, and was attributed to interference in emission from the HOMO and HOMO-2 orbitals.

引用

页数：8

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