jp7b08810_si_001.pdf (122.76 MB)
Absorption and Mid-IR SHG in Two-Dimensional Halogen and Hydrogen Saturated Silicene Series
journal contribution
posted on 2017-11-14, 00:00 authored by Guoyu Yang, Kechen WuDeveloping
nonlinear optical nanodevices compatible for the current
silicon chip industry is of great interest. Modified silicene, with
its single atomic silicon thickness, has become a rising material.
Here, on the basis of first-principle calculations, two-dimensional
halogen and hydrogen saturated silicene are proposed to be competing
candidates for strong second-harmonic generation (SHG) material workings
in the mid-IR range. The SHG coefficient is more than 10 times larger
than KH2PO4 (KDP) with high electron cloud deformability
around halogen atoms. Also the Si–H absorption peak is within
the range of 2102–2140 cm–1 (4673–4757
nm), red-shifted compared to 3300 cm–1 (3030 nm)
of C–H in graphane. In addition, the two-dimensional material
construction method can be extended to other novel two-dimensional
single-element materials, including borophene, phosphorene, germanene,
arsenene, antimonene, and bismuthene.
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Two-Dimensional Halogensingle-element materialssilicon thicknessfirst-principle calculationsModified siliceneelectron cloud deformabilitycmMid-IR SHGsecond-harmonic generationhalogen atomsSHG coefficientKDP10 timesKH 2 PO 4silicon chip industrynmmid-IR rangematerial workingsmaterial construction methodSilicene Series
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