Nonlinear compression toward high-energy single-cycle pulses by cascaded focus and compression.
Nonlinear compression toward high-energy single-cycle pulses by cascaded focus and compression.
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DOI：
10.1126/sciadv.abo1945
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发表时间：
2022-08-05
期刊：
影响因子：
13.6
通讯作者：
Chen, Ming-Chang
中科院分区：
文献类型：
--
作者：
Tsai, Ming-Shian;Liang, An-Yuan;Tsai, Chia-Lun;Lai, Po-Wei;Lin, Ming-Wei;Chen, Ming-Chang
当代超快科学的发展需要可靠的光源来提供高能量的少周期光脉冲。通过实验和模拟，我们展示了一种脉冲后压缩的安排，称为级联聚焦和压缩（CASCADE），用于以紧凑的方式产生毫焦耳级单周期脉冲。级联是通过物质中的一系列焦点来实现的，而在每个焦点之后立即提供脉冲压缩，以保持光谱展宽的高效率。通过在氩气电池中实现四个级联，我们在157至3.1飞秒内实现了1030纳米毫焦级脉冲的50倍压缩，输出脉冲能量为0.98毫焦，传输效率为73%。当驱动高谐波产生时，这些单周期脉冲能够产生载波包络相依赖的极紫外连续体，其能量扩展到180电子伏特，在输出端提供隔离的阿秒脉冲。一个后压缩安排被引入到有效地缩短脉冲到单周期制度。
The advancement of contemporary ultrafast science requires reliable sources to provide high-energy few-cycle light pulses. Through experiments and simulations, we demonstrate an arrangement of pulse postcompression, referred to as cascaded focus and compression (CASCADE), for generating millijoule-level, single-cycle pulses in a compact fashion. CASCADE is realized by a series of foci in matter, whereas pulse compression is provided immediately after each focus to maintain a high efficiency of spectral broadening. By implementing four stages of CASCADE in argon cells, we achieve 50-fold compression of millijoule-level pulses at 1030 nanometers from 157 to 3.1 femtoseconds, with an output pulse energy of 0.98 millijoules and a transmission efficiency of 73%. When driving high harmonic generation, these single-cycle pulses enable the creation of a carrier-envelope phase-dependent extreme ultraviolet continuum with energies extending up to 180 electron volts, providing isolated attosecond pulses at the output. A postcompression arrangement was introduced to efficiently shorten the pulses into the single-cycle regime.
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