Optimum chirp for efficient terahertz generation from two-color femtosecond pulses in air

被引：46

作者：

Zhang, Zhen ^{[1
]}

Panov, N. ^{[2
,3
,4
]}

Andreeva, V. ^{[3
,5
]}

Zhang, Zhelin ^{[1
]}

Slepkov, A. ^{[3
]}

Shipilo, D. ^{[2
,3
,4
]}

Thomson, M. D. ^{[6
]}

Wang, Tie-Jun ^{[7
]}

Babushkin, I. ^{[8
]}

Demircan, A. ^{[8
]}

Morgner, U. ^{[8
]}

Chen, Yanping ^{[1
]}

Kosareva, O. ^{[2
,3
,4
,9
]}

Savel'ev, A. ^{[2
,3
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Phys & Astron, Collaborat Innovat Ctr IFSA, Key Lab Laser Plasmas,Minist Educ, Shanghai 200240, Peoples R China

[2] Lomonosov Moscow State Univ, Int Laser Ctr, 1-62 Leninskie Gori, Moscow 119991, Russia

[3] Lomonosov Moscow State Univ, Fac Phys, 1-2 Leninskie Gori, Moscow 119991, Russia

[4] Russian Acad Sci, Lebedev Phys Inst, 53 Leninskiy Prospect, Moscow 119991, Russia

[5] Univ Minnesota, Sch Math, Minneapolis, MN 55455 USA

[6] Goethe Univ, Phys Inst, Max von Laue Str 1, D-60438 Frankfurt, Germany

[7] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, State Key Lab High Field Laser Phys, Shanghai 201800, Peoples R China

[8] Leibniz Univ Hannover, Inst Quantum Opt, D-30167 Hannover, Germany

[9] Nankai Univ, Inst Modern Opt, Tianjin 300350, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2018年 / 113卷 / 24期

基金：

中国国家自然科学基金; 俄罗斯科学基金会;

关键词：

LASER-PULSES; FILAMENTATION; PROPAGATION; RADIATION; DURATION; POWER;

D O I：

10.1063/1.5053893

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We compare detailed spatio-temporal propagation simulations with experiments on generation of terahertz (THz) pulses in single filaments with two-color optical excitation, which elucidates the mechanism whereby positively chirped optical pulses lead to the maximum THz yield. The long-wavelength components in the leading edge of the positively chirped 2 omega-pulse preserve the overlap with the omega-pulse. The THz yield is extremely sensitive to the temporal overlap: for a 35-fs x-pulse, the yield decreases by an order of magnitude upon a omega-2 omega pulse shift of only 5 fs. Published by AIP Publishing.

引用

页数：5

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