Publications by authors named "Jakub Polaczynski"

Article Synopsis
  • - We developed pentagonal PbSnTe nanowires (NWs) with a specific orientation using advanced growth methods and explored their structural stability across various phases through computational models.
  • - Our findings showcase that the combination of ionic and covalent bonding leads to the preferential formation of these pentagonal structures in tellurides compared to selenides, along with unique electronic properties.
  • - The innovative design of these NWs features a metallic core that connects different electronic bands, differing between various boundaries, potentially paving the way for novel applications in higher-order topology and fractional charge phenomena.
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Nanowire photodetectors are investigated because of their compatibility with flexible electronics, or for the implementation of on-chip optical interconnects. Such devices are characterized by ultrahigh photocurrent gain, but their photoresponse scales sublinearly with the optical power. Here, we present a study of single-nanowire photodetectors displaying a linear response to ultraviolet illumination.

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Article Synopsis
  • The study focuses on GaN single-nanowire ultraviolet photodetectors that incorporate a GaN/AlN superlattice, designed to optimize carrier collection.
  • Under positive bias, the photodetectors enhance collection from the superlattice, while negative bias improves collection from the GaN base, demonstrated through electron beam-induced current measurements.
  • The enhanced response in the UV A/B spectral ranges is supported by photocurrent data, electron microscopy images, and simulations of strain and band structures.
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