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中国光学快报（英文版）
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2026年8期
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Enhancement of the third-harmonic signal from topological material based on a plasmonic nanogroove array
Enhancement of the third-harmonic signal from topological material based on a plasmonic nanogroove array
摘要
Topological materials exhibit a high third-order optical nonlinear coefficient and feasible excitation of surface plasmons,providing a newly emerging platform for the generation of harmonic signals.Here,we prepared nanogroove array struc-tures on antimony telluride topological material by employing focused ion beam etching.Distinct reflection spectral dips were observed in the nanogroove array structures,which result from the generation of plasmonic resonance.Both the measurement and simulation results demonstrate that the plasmonic resonance is dependent on the structural parameters of topological material.The third-harmonic generation was measured from the nanostructures of topological material with a home-made nonlinear spectroscopy system.It is found that the third-harmonic signal from the topological material exhib-its a distinct improvement due to the plasmonic resonance in the nanogroove array at the third-harmonic wavelength.The third-harmonic generation can be effectively reinforced fivefold with the generation of plasmonic resonance.The results offer a new avenue for nanoscale enhancement of harmonic generation in topological materials.
年，卷(期)：
2026, 24(8)
机标分类号：
TP311
O6-39
TS805.3
在线出版日期：
2026年10月29日
