Premium
Tip‐enhanced spectroscopy of 2D black phosphorus
Author(s) -
Gao Man,
Sun Mengtao,
Meng Lingyan
Publication year - 2019
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.5610
Subject(s) - raman spectroscopy , spectroscopy , fluorescence spectroscopy , plasmon , materials science , wavelength , fluorescence , optics , soft x ray emission spectroscopy , optoelectronics , laser , analytical chemistry (journal) , time resolved spectroscopy , chemistry , physics , quantum mechanics , chromatography
Optical studies on black phosphorus (BP) are crucial for its applications in plasmon‐enhanced spectroscopy, biomedicine, and energy. Plasmonic enhancement, spatial resolution, and directional emission, which related to tip‐enhanced spectroscopy of few‐layer BP, have been theoretically investigated. Calculated Raman and fluorescence enhancement factors are 8 and 3 orders of magnitude, respectively. The spatial resolutions for Raman and fluorescence spectroscopy could reach 6 and 7 nm, respectively, under the 633‐nm laser wavelength. Directional tip‐enhanced spectroscopy emission reveals a tunable optimized collection angle by changing the tilted angle of the tip. Our theoretical results provide a deep understanding of the underlying enhanced mechanism of BP spectroscopy, useful for the design of nanoelectronic and optoelectronic devices.