Enhanced sensitivity of the Z-scan technique on saturable absorbers using radially polarized beams

We develop the Z-scan technique on a saturable absorber under the excitation of radially polarized beams. It is shown that the sensitivity of the Z-scan measurements on a saturable absorber using radially polarized beams has the great improvement compared with those using the scalar light beams such...

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Veröffentlicht in:Journal of applied physics 2016-02, Vol.119 (7)
Hauptverfasser: Liu, Dahui, Gu, Bing, Ren, Boxiao, Lu, Changgui, He, Jun, Zhan, Qiwen, Cui, Yiping
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Sprache:eng
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Zusammenfassung:We develop the Z-scan technique on a saturable absorber under the excitation of radially polarized beams. It is shown that the sensitivity of the Z-scan measurements on a saturable absorber using radially polarized beams has the great improvement compared with those using the scalar light beams such as Gaussian beams, Laguerre-Gaussian beams, and top-hat beams. As the experimental evidence, we investigate the saturable absorption properties of layered WS2 nanosheets in aqueous suspension by performing the radially polarized-beam Z-scan measurements with femtosecond laser pulses in the near infrared region.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4942181