By introducing instability to reduce the static bulk modulus to zero, researchers can overcome causality-imposed limitations and achieve near-perfect acoustic blackbody absorption, suggesting that true blackbody absorption is limited only by material constraints, not fundamental physics.
通過將系統耦合到不穩定組件以降低其有效體積模量,可以克服聲學中由因果關係對完美吸收(黑體)施加的限制。
This paper presents a novel method for continuous acoustic wave amplitude modulation by leveraging the interference phenomenon between two mode-conversion paths in a hybrid geometric-phase meta-atom (HGPM) pair, achieving nearly 100% modulation depth by simply adjusting the relative orientation angle of the meta-atoms.