Proceedings of the
9th International Conference of Nanomanufacturing (nanoMan2024)
December 1 – 4, 2024, Singapore
Specialized SiO2 Multilayered Coatings for Macroscopic Optical Force Sensors
State Key Laboratory of Precision Measuring Technology and Instruments, Laboratory of Micro/Nano Manufacturing Technology, (MNMT), Tianjin University, Tianjin, China.
ABSTRACT
Multilayered coatings are routinely used in optical devices to achieve their functions. In this study, a specialized multilayered coating is proposed which composed of alternating layers of SiO2 and TiO2 to create spectral gaps for varied incidents of high-power laser. The multilayered coating helps to achieve low-thermally induced fluctuations and effective optical force, which essentially ensures the performance of the optical force sensor. A theoretical framework for the analysis of the optical force in the multilayered coating is developed based on the Maxwell tensor of classical electrodynamics and the boundary conditions at the periodic interfaces. It is compatible with different numbers of layers. And the design, fabrication and measurement of the coating are demonstrated. The simulation and experiment results show that the multilayered coating can be employed to generate accurate optical force, which is consistent with the design. The study provides a new methodology for the control of optical forces and has a critical importance in the application of optical force on a macroscopic scale.
Keywords: Multilayered coatings, High-reflectivity, Optical force, Electrodynamics.
