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arXiv · 2305.06945

Hyperspectral photoluminescence and reflectance microscopy of 2D materials

David Tebbe·Marc Schütte·Baisali Kundu·Bernd Beschoten·Prasana K. Sahoo·Lutz Waldecker
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Abstract

Optical micro-spectroscopy is an invaluable tool for studying and characterizing samples ranging from classical semiconductors to low-dimensional materials and heterostructures. To date, most implementations are based on point-scanning techniques, which are flexible and reliable, but slow. Here, we describe a setup for highly parallel acquisition of hyperspectral reflection and photoluminescence microscope images using a push-broom technique. Spatial as well as spectral distortions are characterized and their digital corrections are presented. We demonstrate close-to diffraction-limited spatial imaging performance and a spectral resolution limited by the spectrograph. The capabilities of the setup are demonstrated by recording a hyperspectral photoluminescence map of a CVD-grown MoSe$_2$-WSe$_2$ lateral heterostructure, from which we extract the luminescence energies, intensities and peak widths across the interface.

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David Tebbe, Marc Schütte, Baisali Kundu, Bernd Beschoten, Prasana K. Sahoo, Lutz Waldecker. 2023-11-21. Hyperspectral photoluminescence and reflectance microscopy of 2D materials. https://doi.org/10.1088/1361-6501%2Fad128e

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