Journal
JOURNAL OF APPLIED PHYSICS
Volume 119, Issue 7, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4942181
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Funding
- National Science Foundation of China [11474052, 11174160]
- National Key Basic Research Program of China [2015CB352002]
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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. (C) 2016 AIP Publishing LLC.
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