Progressive Self-Boosting Anapole-Enhanced Deep-Ultraviolet Third Harmonic During Few-Cycle Laser Radiation
Progressive Self-Boosting Anapole-Enhanced Deep-Ultraviolet Third Harmonic During Few-Cycle Laser Radiation
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DOI：
10.1021/acsphotonics.0c00753
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发表时间：
2020-07-15
期刊：
影响因子：
7
通讯作者：
Kovacev, Milutin
中科院分区：
文献类型：
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作者：
Shi, Liping;Evlyukhin, Andrey B.;Kovacev, Milutin
由具有强非线性的高折射率半导体制成的纳米天线和支持的光学Mie型共振为非线性纳米光子学提供了一个很有前途的替代平台。在这封信中，我们使用了不同直径的非晶硅纳米盘阵列来产生几个周期的钛宝石振荡器的宽带深紫外三次谐波。超短光脉冲有效地将它们的能量储存在圆盘的中心，在那里电场被极点状态强烈放大。这导致了在极多冲(>；10)脉冲中的渐进材料改性和相当低的通量(
Nanoantennas made of high-index semiconductors with a strong nonlinearity and supported optical Mie-type resonances offer a promising alternative platform for nonlinear nanophotonics. In this Letter, we employ an array of amorphous silicon nanodisks with varying diameters to produce a broadband deep-ultraviolet third harmonic of a few-cycle Ti:sapphire oscillator. Ultrashort light pulses efficiently deposit their energy at the center of the disks where the electric field is strongly amplified by the anapole states. This leads to a progressive material modification in an extreme multishot (>10(10)pulses) and a rather low fluence (