Self-stabilizing curved metasurfaces as a sail for light-propelled spacecrafts

Area of Science:

• Space exploration technology
• Materials science
• Applied physics

Background:

• Laser-driven spacecrafts offer a pathway to near-light-speed travel for outer space exploration.
• Key challenges include maintaining spacecraft stability during acceleration and ensuring sail reflectivity without overheating.

Purpose of the Study:

• To propose and analyze a novel curved metasurface design for laser-driven spacecraft.
• To ensure the stability and efficient light interaction of spacecraft sails.

Main Methods:

• Design of a lightweight, low-absorbing, high-reflective, self-stabilizing curved metasurface using c-Si nanoparticles.
• Development of a stability determination method and analysis of rotational stability using multipole expansion.
• Verification through numerical simulations of metasurface trajectory.

Main Results:

• Curved metasurfaces demonstrate beneficial effects on overall spacecraft stability.
• An optimal operating regime for rotational stability was identified.
• Numerical simulations confirmed the validity of the proposed method and design.

Conclusions:

• The proposed curved metasurface design is a promising solution for stable laser-driven spacecraft.
• This research advances the feasibility of high-speed interstellar exploration using laser propulsion.