Beyond Bloch modes: Ultra-broadband absorber with a periodic dielectric-dielectric-metal multilayer

Key Points

• The ultra-broadband absorber demonstrates high efficiency across a wide range of wavelengths, maximizing light absorption.
• Key evidence includes over 90% absorption efficiency across a spectrum spanning multiple optical regions.
• Analysis of multilayer structures utilizes dielectric and metal materials, enhancing light manipulation significantly.
• Implications highlight opportunities for advanced photonic devices, although practical applications may still require optimization.