论文标题
几个循环涡流光束是由薄板中中红外飞秒涡流梁的自我压缩产生的
Few-cycle vortex beam generated from self-compression of mid-infrared femtosecond vortex beam in thin plates
论文作者
论文摘要
从理论上讲，我们可以使用薄板方案对中红外飞秒涡流束的自我压缩来生成几个具有地下峰值功率的周期涡流束。输入持续时间为90 fs的3μM飞秒涡流束被压缩至15.1 fs，并保留了涡旋特性。转化效率高达91.5％，峰值功率达到0.18 TW。这种新型方案的适当时空匹配是由于适当的时空匹配而产生的高峰值旋转光束，在这种方案中，光谱足够宽，负群速度分散剂可以补偿非线性效应引起的正chiRP，并且抑制了多重细丝以保持涡旋特征的保留。我们的工作将有助于产生孤立的Attsond涡流，并在超快科学方面开辟了新的观点。
We demonstrate theoretically that few-cycle vortex beam with subterawatt peak power can be generated by self-compression of mid-infrared femtosecond vortex beam using the thin-plate scheme. The 3 μm femtosecond vortex beam with input duration of 90 fs is compressed to 15.1 fs with the vortex characteristics preserved. The conversion efficiency is as high as 91.5% and the peak power reaches 0.18 TW. The generation of the high-peak-power few-cycle vortex beam is owing to the proper spatiotemporal match by this novel scheme, where the spectrum is broadened enough, the negative group velocity dispersion can compensate the positive chirp induced by nonlinear effects, and multiple filamentation is inhibited for the keeping of the vortex characteristics. Our work will help to generate isolated attosecond vortices, opening a new perspective in ultrafast science.
