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Remote Excitation of Tip-Enhanced Photoluminescence with a Parallel AgNW Coupler.
Peeters, Wannes; Toyouchi, Shuichi; Fujita, Yasuhiko; Wolf, Mathias; Fortuni, Beatrice; Fron, Eduard; Inose, Tomoko; Hofkens, Johan; Endo, Takahiko; Miyata, Yasumitsu; Uji-I, Hiroshi.
Afiliación
  • Peeters W; Division of Molecular Imaging and Photonics, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Heverlee B-3001, Belgium.
  • Toyouchi S; Division of Molecular Imaging and Photonics, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Heverlee B-3001, Belgium.
  • Fujita Y; Research Institute for Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST Chugoku), Kagamiyama 3-11-32, Higashi-hiroshima, Hiroshima 739-0046, Japan.
  • Wolf M; Division of Molecular Imaging and Photonics, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Heverlee B-3001, Belgium.
  • Fortuni B; Division of Molecular Imaging and Photonics, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Heverlee B-3001, Belgium.
  • Fron E; Division of Molecular Imaging and Photonics, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Heverlee B-3001, Belgium.
  • Inose T; Institute for Integrated Cell-Material Science (WPI-iCeMS), Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan.
  • Hofkens J; The HAKUBI Center for Advanced Research, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan.
  • Endo T; Division of Molecular Imaging and Photonics, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Heverlee B-3001, Belgium.
  • Miyata Y; Max Planck Institute for Polymer Research, Mainz 55128, Germany.
  • Uji-I H; Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan.
ACS Omega ; 8(41): 38386-38393, 2023 Oct 17.
Article en En | MEDLINE | ID: mdl-37867716
Tip-enhanced photoluminescence (TEPL) microscopy allows for the correlation of scanning probe microscopic images and photoluminescent spectra at the nanoscale level in a similar way to tip-enhanced Raman scattering (TERS) microscopy. However, due to the higher cross-section of fluorescence compared to Raman scattering, the diffraction-limited background signal generated by far-field excitation is a limiting factor in the achievable spatial resolution of TEPL. Here, we demonstrate a way to overcome this drawback by using remote excitation TEPL (RE-TEPL). With this approach, the excitation and detection positions are spatially separated, minimizing the far-field contribution. Two probe designs are evaluated, both experimentally and via simulations. The first system consists of gold nanoparticles (AuNPs) through photoinduced deposition on a silver nanowire (AgNW), and the second system consists of two offset parallel AgNWs. This latter coupler system shows a higher coupling efficiency and is used to successfully demonstrate RE-TEPL spectral mapping on a MoSe2/WSe2 lateral heterostructure to reveal spatial heterogeneity at the heterojunction.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ACS Omega Año: 2023 Tipo del documento: Article País de afiliación: Bélgica Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ACS Omega Año: 2023 Tipo del documento: Article País de afiliación: Bélgica Pais de publicación: Estados Unidos