Ultra-Efficient and Highly Selective Wireless Power Transfer Based on Coherent Perfect Absorption in a Complex Propagation Environment

In this letter, we present a coherent perfect absorption (CP A)-based WPT approach that enables near-complete absorption of all injected power at the receiver with minimal energy loss. Utilizing the load resistance of the rectifier as the primary loss mechanism to realize the CPA state, we experimentally demonstrate that ultra-efficient and highly selective wireless power transmission can be achieved even in a complex propagation environment.