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Issue 30, 2019
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Tin diselenide van der Waals materials as new candidates for mid-infrared waveguide chips

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Abstract

Mid-infrared is a spectral region of molecular vibration and rotation modes and thus, it has been widely used in chem/bio analysis. On-chip MIR waveguides combining attenuated total reflection spectroscopy provide an efficient way to minimize equipment size and benefit chemical trace analysis. But, inevitable surface roughness-induced scattering is harmful for waveguide mode propagation in traditional sensors. Two-dimensional materials are natural thin slabs with atomic-scale smooth surfaces and thus could be excellent for building weak surface scattering waveguides. Here, we used near-field microscopy to investigate a waveguide mode of 1T tin diselenide slabs at nanoscale resolution in 5.13–6.57 μm and manipulate the mode strengths and wavelengths by controlling the slab thickness. This work extends two-dimensional materials as building blocks for integrated MIR chips.

Graphical abstract: Tin diselenide van der Waals materials as new candidates for mid-infrared waveguide chips

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Article information


Submitted
19 May 2019
Accepted
12 Jul 2019
First published
12 Jul 2019

Nanoscale, 2019,11, 14113-14117
Article type
Communication

Tin diselenide van der Waals materials as new candidates for mid-infrared waveguide chips

M. Xue, Q. Zheng, R. Chen, L. Bao, S. Du and J. Chen, Nanoscale, 2019, 11, 14113
DOI: 10.1039/C9NR04264D

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