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https://hdl.handle.net/1822/65791
Título: | Characterization of the second- and third-harmonic optical susceptibilities of atomically thin tungsten diselenide |
Autor(es): | Rosa, Henrique G. Ho, Yi Wei Verzhbitskiy, Ivan Rodrigues, Manuel José Lima Ferreira Taniguchi, Takashi Watanabe, Kenji Eda, Goki Pereira, Vitor M. Gomes, José C. V. |
Data: | 3-Jul-2018 |
Editora: | Nature Research |
Revista: | Scientific Reports |
Resumo(s): | We report the first detailed characterization of the sheet third-harmonic optical susceptibility, χ(3)s, of tungsten diselenide (WSe2). With a home-built multiphoton microscope setup developed to study harmonics generation, we map the second and third-harmonic intensities as a function of position in the sample, pump power and polarization angle, for single- and few-layers flakes of WSe2. We register a value of |χ(3)s| ≈ 0.9 × 10-28 m3 V-2 at a fundamental excitation frequency of ℏω = 0.8 eV, which is comparable in magnitude to the third-harmonic susceptibility of other group-VI transition metal dichalcogenides. The simultaneously recorded sheet second-harmonic susceptibility is found to be |χ(2)s| ≈ 0.7 × 10-19 m2 V-1 in very good agreement on the order of magnitude with recent reports for WSe2, which asserts the robustness of our values for |χ(3)s|. |
Tipo: | Artigo |
Descrição: | Supplementary information accompanies this paper at https://doi.org/10.1038/s41598-018-28374-1 |
URI: | https://hdl.handle.net/1822/65791 |
DOI: | 10.1038/s41598-018-28374-1 |
ISSN: | 2045-2322 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CDF - OCV - Artigos/Papers (with refereeing) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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s41598-018-28374-1.pdf | 2,85 MB | Adobe PDF | Ver/Abrir |