Effect of multiple conduction bands on high-harmonic emission from dielectrics

被引：148
作者：
Hawkins, Peter G. [1 ]
Ivanov, Misha Yu. [1 ,2 ]
Yakovlev, Vladislav S. [3 ,4 ,5 ]
机构：
[1] Univ London Imperial Coll Sci Technol & Med, Dept Phys, London SW7 2AZ, England
[2] Max Born Inst, D-12489 Berlin, Germany
[3] Max Planck Inst Quantum Opt, D-85748 Garching, Germany
[4] Univ Munich, Dept Phys, D-58748 Garching, Germany
[5] Georgia State Univ, Dept Phys & Astron, Ctr Nanoopt, Atlanta, GA 30303 USA
来源：
PHYSICAL REVIEW A | 2015年 / 91卷 / 01期
基金：
英国工程与自然科学研究理事会;
关键词：
MOLECULES; DYNAMICS; TIME; INTERFEROMETRY; GENERATION; ELECTRONS; FIELD;
D O I：
10.1103/PhysRevA.91.013405
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We find that, for sufficiently strong mid-IR fields, transitions between different conduction bands play an important role in the generation of high-order harmonics in a dielectric. The transitions make a significant contribution to the harmonic signal, and they can create a single effective band for the motion of an electron wave packet. We show how high harmonic spectra produced during the interaction of ultrashort laser pulses with periodic solids provide a spectroscopic tool for understanding the effective band structure that controls electron dynamics in these media.
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页数：5
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