講演情報
[21a-P01-3]Unveiling NiFe2O4 Nanoparticles as an Efficient Nonlinear Optical Limiter
〇(D)Naresh Aggarwal1, Pratik V. Shinde2, Chandra Sekhar rout2, Adarsh K. V.1 (1.Department of Physics, Indian Inst. of Science Education and Research, Bhopal,462066, India, 2.Centre for Nano and Materials Science, Jain Univ., Ramanagaram, Bangalore,562112, India)
キーワード：
Optical limiter
Ternary transition metal oxides (TMOs) belong to an exciting branch of material due to their high use in supercapacitors because of their excellent electrochemical properties and multiple oxidation states. Nickel ferrite oxides NiFe2O4 (NFO) are also a member of the TMOs family which have very high optical limiting strength and quick response time and have also been used in the field of supercapacitors. However, the nonlinear optical response of NFO is still not explored in detail. In this article, we tailored the nonlinear optical limiting response of NFO nanoparticles and tuned its nonlinear behavior as a function of intensity for its applications as one of the best optical limiter materials. Here, we investigate the nonlinear optical performance of NFO by using the Z-scan technique based on third-order nonlinear processes in which we excite the sample by a nanosecond laser whose pulse width is 7ns and photons have energy around 2.33eV. We observed that NFO shows reverse saturable absorption behavior with a very large absorption coefficient β in the order of 102 cm/GW and a very low optical onset (FON) as compared to many other TMOs materials and hence it can be a hallmark material for using optical limiting applications. We also observed that NFO has a negative nonlinearity response with a nonlinear refractive index around 10-4cm2 GW-1, which exposes its self-defocusing nature. Overall, our studies demonstrate that NFO is also a hallmark material for use as a good optical limiting material as well as a supercapacitor.