Journal
OPTICS LETTERS
Volume 46, Issue 2, Pages 206-209Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.408816
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- Deputy for Research and Technology of Shahid BeheshtiUniversity [600/5290]
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The manipulation of the nonlinear optical response of graphene oxide liquid crystals through a mechanical-hydrodynamical approach has been demonstrated in this study. The experimental results show that increasing the flow rate in the microchannel enhances both linear and nonlinear absorption coefficients, reducing the laser beam transmission through the sample significantly.
Manipulation of the nonlinear optical response of materials plays a significant role in photonics applications; however, it may be irreversible, untunable, and uncontrollable, which makes it difficult. In this Letter, we present a mechanical-hydrodynamical approach through a microchannel to tune the nonlinear absorption response of graphene oxide liquid. crystals. In this material, the optical properties depend on the flake orientation. This feature has helped us to study empirically the dependency of the nonlinear absorption coefficients to external hydrodynamical force by employing the Z-scan technique. The experimental results show that increasing the flow rate in the microchannel enhances both linear and nonlinear absorption coefficients and, as a result, reduces the laser beam transmission through the sample. It has been observed that the percentage change in the nonlinear absorption coefficient of the sample is significant due to the flow rate. (C) 2021 Optical Society of America
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