<p>This study presents a multiphysics multiscale concurrent topology optimization framework for designing lightweight porous robotic actuators harvesting thermal energy by laser-induced thermal effects. By integrating conduction, convection, and radiation, we explore the thermal and structural behavior of porous actuators. A multiscale optimization approach achieves a 45% performance improvement and a 75% weight reduction compared to solid designs. Simultaneous optimization of micro and macro scales proves more effective than sequential optimizations, resulting in better material distribution. The design adapts to enhanced thermal convection, developing extensions from the macro structure, which improve resilience against heat-induced stresses. Microstructural adjustments, such as optimizing thermal conductivity tensors, further enhance performance. The findings highlight the importance of balancing radiation and convection for efficient thermal dissipation in laser-activated porous systems.</p>