Circularly polarized vacuum ultraviolet coherent light generation using a square lattice photonic crystal nanomembrane
Circularly polarized vacuum ultraviolet coherent light generation using a square lattice photonic crystal nanomembrane
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DOI：
10.1364/optica.393816
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发表时间：
2020-08-20
期刊：
影响因子：
10.4
通讯作者：
Kuwata-Gonokami, Koto
中科院分区：
文献类型：
--
作者：
Konishi, Kuniaki;Akai, Daisuke;Kuwata-Gonokami, Koto
真空紫外区的圆偏振光对于探测物质的结构和电子性质具有重要意义。此外，圆偏振VUV相干光使人们能够观察固体中生物分子和电子自旋的动力学。由于VUV区偏振控制元件的限制，开发直接产生圆偏振VUV相干光的桌面技术具有重要的应用价值。然而，用于此目的的固态非线性介质尚未出现，这简化了设置。在这里，我们展示了一种在介电方形晶格光子晶体纳米膜（PCN）中使用三次谐波直接产生圆偏振VUV相干光的固体基方法。我们发现，在圆极化基束照射下，具有四重旋转对称的PCN波导共振在157 nm处产生圆极化三次谐波，其强度足以应用于VUV光谱。研究结果表明，PCN可以作为一种实用的非线性介质用于圆偏振相干VUV的产生。(c)根据OSA开放获取出版协议的条款，2020年美国光学学会
Circularly polarized light in the vacuum ultraviolet (VUV) region is important for probing the structural and elec-tronic properties of matter. Moreover, a circularly polarized VUV coherent light enables one to observe the dynamics of biomolecules and electron spins in solids. The development of a table-top technology to directly generate circularly polarized VUV coherent light is of great value, owing to the limitation of polarization control elements for the VUV region. However, solid-state nonlinear media for this purpose, which simplifies the setup, have not been presented. Here, we demonstrate a solid-based method for the direct generation of circularly polarized VUV coherent light using third -harmonic generation in a dielectric square lattice photonic crystal nanomembrane (PCN). We found that the waveguide resonance of PCN with fourfold rotational symmetry, irradiated by a circularly polarized fundamental beam, generates circularly polarized third harmonic at 157 nm with sufficient intensity for VUV spectroscopic applications. The pre-sented results suggest the possibility that the PCN can be used as a practical nonlinear medium for circularly polarized coherent VUV generation. (c) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement