Spatiotemporal Focusing Dynamics of Intense Supercontinuum THz Pulses

被引：89
作者：
Ruchert, Clemens [1 ]
Vicario, Carlo [1 ]
Hauri, Christoph P. [1 ,2 ]
机构：
[1] Paul Scherrer Inst, SwissFEL, CH-5232 Villigen, Switzerland
[2] Ecole Polytech Fed Lausanne, CH-1015 Lausanne, Switzerland
来源：
PHYSICAL REVIEW LETTERS | 2013年 / 110卷 / 12期
关键词：
OPTICAL RECTIFICATION; TERAHERTZ; GENERATION;
D O I：
10.1103/PhysRevLett.110.123902
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
High-field terahertz (THz) single-cycle pulses with 1.5 MV/cm are generated by optical rectification in the stilbazolium salt crystal 4-N, N-dimethylamino-4'-N'-methyl-stilbazolium 2,4,6-trimethylbenzenesulfonate. We show experimentally that the generated THz transient carrying 5 octaves (0.15 to 5.5 THz) undergoes a complex time-frequency evolution when tightly focused, and we present a model based on three independent oscillating dipoles capable to describe this anomalous field evolution. Finally, we present a method to control the absolute phase of such supercontinuum THz pulses as an essential tool for future field-sensitive investigations. DOI: 10.1103/PhysRevLett.110.123902
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页数：5
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