多层二硒化锡二次谐波产生的观察

2019 International Conference on Optical MEMS and Nanophotonics (OMN) Pub Date : 2019-07-01 DOI:10.1109/omn.2019.8925139

Rabindra Biswas, Medha Dandu, Asish Prosad, Sruti Menon, K. Majumdar, V. Raghunathan

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引用次数: 1

摘要

我们报道了利用非线性光学显微镜装置从多层二硒化锡$(\ mathm {S}\ mathm {n}\ mathm {S}\ mathm {e}_{2})$薄片产生的空间分辨二次谐波。二阶非线性信号从$\mathrm{S}\mathrm{n}\mathrm{S}\mathrm{e}_{2}\ \mathrm{i}\mathrm{S}\ sim比石英衬底弱21$ $。二硒化锡有望呈现中心对称晶格排列，二阶非线性光学效应消失。观察到的多层$\mathrm{S}\mathrm{n}\mathrm{S}\mathrm{e}_{2}$的二阶非线性效应归因于晶格畸变。

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Observation of second harmonic generation from multilayer Tin diselenide

We report spatially resolved second harmonic generation from a multilayer tin di-selenide $(\mathrm{S}\mathrm{n}\mathrm{S}\mathrm{e}_{2})$ flake using a nonlinear optical microscopy setup. The second order nonlinear signal from $\mathrm{S}\mathrm{n}\mathrm{S}\mathrm{e}_{2}\ \mathrm{i}\mathrm{s}\sim 21$ times weaker than that of quartz substrate. Tin di-selenide is expected to exhibit centrosymmetric lattice arrangement with vanishing second-order nonlinear optical effects. The observed second order nonlinear effects from multi-layer $\mathrm{S}\mathrm{n}\mathrm{S}\mathrm{e}_{2}$ is ascribed to lattice distortions.

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2019 International Conference on Optical MEMS and Nanophotonics (OMN)

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