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arXiv · 2110.12874

Two-dimensional Platinum Diselenide Waveguide-Integrated Infrared Photodetectors

Shayan Parhizkar·Maximilian Prechtl·Anna Lena Giesecke·Stephan Suckow·Sophia Wahl·Sebastian Lukas·Oliver Hartwig·Nour Negm·Arne Quellmalz·Kristinn B. Gylfason·Daniel Schall·Matthias Wuttig·Georg S. Duesberg·Max C. Lemme
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Abstract

Low cost, easily integrable photodetectors (PDs) for silicon (Si) photonics are still a bottleneck for photonic integrated circuits (PICs), especially for wavelengths above 1.8 ${\mu}$m. Multilayered platinum diselenide (PtSe$_2$) is a semi-metallic two-dimensional (2D) material that can be synthesized below 450${\deg}$C. We integrate PtSe$_2$ based PDs directly by conformal growth on Si waveguides. The PDs operate at 1550 nm wavelength with a maximum responsivity of 11 mA/W and response times below 8.4 ${\mu}$s. Fourier transform infrared spectroscopy (FTIR) in the wavelength range from 1.25 ${\mu}$m to 28 ${\mu}$m indicates the suitability of PtSe$_2$ for PDs far into the infrared wavelength range. Our PtSe$_2$ PDs integrated by direct growth outperform PtSe$_2$ PDs manufactured by standard 2D layer transfer. The combination of IR responsivity, chemical stability, selective and conformal growth at low temperatures, and the potential for high carrier mobility, make PtSe$_2$ an attractive 2D material for optoelectronics and PICs.

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Shayan Parhizkar, Maximilian Prechtl, Anna Lena Giesecke, Stephan Suckow, Sophia Wahl, Sebastian Lukas, Oliver Hartwig, Nour Negm, Arne Quellmalz, Kristinn B. Gylfason, Daniel Schall, Matthias Wuttig, Georg S. Duesberg, Max C. Lemme. 2021-10-17. Two-dimensional Platinum Diselenide Waveguide-Integrated Infrared Photodetectors. https://doi.org/10.1021/acsphotonics.1c01517

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