Print Email Facebook Twitter Revealing the nanogeometry of WS2 nanoflowersby polarization-resolved Raman spectroscopy Title Revealing the nanogeometry of WS2 nanoflowersby polarization-resolved Raman spectroscopy Author Komen, I. (TU Delft QN/Kuipers Lab; Kavli institute of nanoscience Delft) van Heijst, S.E. (TU Delft QN/Conesa-Boj Lab; Kavli institute of nanoscience Delft) Caldarola, M. (TU Delft QN/Kuipers Lab; Kavli institute of nanoscience Delft) Conesa Boj, S. (TU Delft QN/Conesa-Boj Lab; Kavli institute of nanoscience Delft) Kuipers, L. (TU Delft QN/Quantum Nanoscience; Kavli institute of nanoscience Delft) Department QN/Quantum Nanoscience Date 2022 Abstract Recent studies of transition metal dichalcogenides (TMDs) have revealed exciting optical properties, such as stable excitons and chiral light–matter interactions. Chemical vapor deposition techniques provide a platform for the fabrication of nanostructures with diverse geometries, ranging from horizontal flakes to flower-like structures. Raman spectroscopy is commonly used to characterize TMDs and their properties. Here, we use polarization-resolved Raman spectroscopy to probe the nanogeometry and orientation of WS 2 nanoflower petals.Exciting the nanoflowers with linearly polarized light, we observe an enhanced Raman response from flower petals oriented along the excitation polarization direction. Furthermore, the helicity-resolved Raman response of vertically oriented wall-like flower petals exhibits clear differences with horizontally oriented flakes. Although the photoluminescence from the nanoflowers is strongly reduced, the Raman response upon excitation in resonance with the WS 2 excitonic transition does reveal the presence of the exciton, which results in a distinct temperature dependence of the Raman response. To reference this document use: http://resolver.tudelft.nl/uuid:4388c0ed-3160-48c0-9d49-0cebbe103d11 DOI https://doi.org/10.1063/5.0102381 Embargo date 2023-07-01 ISSN 0021-8979 Source Journal of Applied Physics, 132 (17) Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2022 I. Komen, S.E. van Heijst, M. Caldarola, S. Conesa Boj, L. Kuipers Files PDF 5.0102381.pdf 3.22 MB Close viewer /islandora/object/uuid:4388c0ed-3160-48c0-9d49-0cebbe103d11/datastream/OBJ/view