OPTICAL PASSIVE LIMITING OF COMPOSITE CARBON NANOMATERIAL: MULTI-WALLED NANOTUBES, REDUCED GRAPHENE OXIDE SHEETS, AND ZINC PHTHALOCYANINE
Pavel N.Vasilevsky1, Mikhail S. Savelyev1,2, Alexander Yu. Tolbin2, Alexander Yu. Gerasimenko1,3
1Institute of Biomedical Systems, National Research University of Electronic Technology, Zelenograd, Moscow, 124498, Russian Federation; 2FSBIS Institute of Physiologically Active Compounds of the Russian Academy of Sciences, Russian Academy of Sciences, Chernogolovka, Moscow Region, 142432, Russian Federation; 3Institute for Bionic Technologies and Engineering, Sechenov University, Moscow, 119991, Russian Federation
Abstract
Carbon nanotubes are considered promising materials for the creation of optical limiters for laser radiation. However, their practical application in this field is significantly limited by an insufficiently pronounced nonlinear optical response. In this work, a composite carbon nanomaterial based on multi-walled carbon nanotubes (MWCNTs), reduced graphene oxide (rGO) sheets, and zinc phthalocyanine (PcZn) is proposed. The material is designed to enhance the efficiency of nonlinear attenuation of radiation. It was found that the created nanomaterial provides an expansion of the dynamic attenuation range from 39.74 to 52.49 for the MWCNT/rGO/PcZn composite. Moreover, this composite carbon nanomaterial is characterized by high values of the nonlinear absorption coefficient (3.2 cm/GW) and attenuation (12 dB). The obtained values indicate a synergistic effect caused by the interaction of MWCNTs and rGO within the composite structure, increasing the scattering contribution due to their complex morphology, as well as the ability of zinc phthalocyanine to enhance radiation absorption under self-focusing conditions.
The rGO carbon nanomaterial exhibited the highest nonlinear absorption coefficient (3.7 cm/GW), but it was characterized by the highest threshold exposure (0.7 J/cm2) and, consequently, a low dynamic range (39.74). The MWCNT/rGO/PcZn composite carbon nanomaterial exhibited a threshold exposure of 0.53 J/cm2. The obtained results confirm the effectiveness of the proposed approach to enhancing the nonlinear optical properties of carbon nanomaterials for passive laser protection applications.
Funding: The main research was carried out with the financial support of the Russian Science Foundation (Grant 25-73-20034).
Speaker
Vasilevsky Pavel
Institute of Biomedical Systems, National Research University of Electronic Technology
Russian Federation
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