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Nonlinear Optical Response of Chinese Teas Probed by Spatial Self-Phase Modulation
Brazilian Journal of Physics ( IF 1.6 ) Pub Date : 2020-05-01 , DOI: 10.1007/s13538-020-00756-9 Diogo L. M. de Souza , Marcos V. G. Bittencourt , Vinícius M. Lenart , Gerson K. da Cruz , Rozane F. Turchiello , Sergio L. Gómez
Brazilian Journal of Physics ( IF 1.6 ) Pub Date : 2020-05-01 , DOI: 10.1007/s13538-020-00756-9 Diogo L. M. de Souza , Marcos V. G. Bittencourt , Vinícius M. Lenart , Gerson K. da Cruz , Rozane F. Turchiello , Sergio L. Gómez
Chinese tea is the most highly consumed beverage globally. Its different types exhibit a strong nonlinear optical response as probed previously by Z-scan technique at various time scales. In this work, infusions of commercially available black, green, and white Chinese teas, prepared by running one cycle of a Soxhlet extraction, were studied by spatial self-phase modulation of a CW laser; each sample was found to have a different nonlinear refractive index n2, which can be used to distinguish these teas.
更新日期：2020-05-01
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