Investigation of nonlinear optical effects of hybrid thermosensitive platforms modified with plasmonic and dielectric nanoparticles
L. V. Mikhailova,1 E. N. Gerasimova,1 V. V. Yaroshenko,1 M. V. Zyuzin1
1 Faculty of Physics, ITMO University, Kronverksky Pr. 49, bldg. A, St. Petersburg 197101, Russian Federation
Abstract
Various scientific areas, including imaging, portable sensors, and smart devices, are extremely interested in mechanically switchable optical systems that are responsive to external stimuli. Due to their capacity to modify the phase or frequency of the optical field, which results in mechanical changes in their structure, micro- and nanoscaled optomechanical systems offer a lot of potential. As a result, optical response may be changed in real time based on surface pattern and design.
This work presents a thermally-sensitive mechanically driven platform based on poly(N-isopropylacrylamide) (pNIPAM) microspheres modified with high refractive index dielectric (silicon, Si) and plasmonic (gold, Au) nanoparticles for second harmonic generation tuning. The platform enhances second harmonic generation depending on the applied temperature, amplifications of its signal more than 7 times for pNIPAM@Si and 32 times for pNIPAM@Si@Au. The tunability of these platforms makes them potential for robotic controllers. The enhancement of second harmonic generation after phase transition exceeds 7 times, and both platforms are reversible and reproducible.
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Lidia V. Mikhailova
ITMO University
Russia
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