Perfect Absorption in a Disordered Medium with Programmable Meta‐Atom Inclusions - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Advanced Functional Materials Année : 2020

Perfect Absorption in a Disordered Medium with Programmable Meta‐Atom Inclusions

Mohammadreza F. Imani
  • Fonction : Auteur
David R Smith
  • Fonction : Auteur

Résumé

Achieving the very special condition of perfect absorption (PA) in a complex scattering enclosure promises to enable a wealth of applications in secure communication, precision sensing, wireless power transfer, analog signal processing and random lasing. Consequently, a lot of recent research effort was dedicated to proposing wavefront shaping protocols to implement coherent PA in complex scattering environments with tunable localized absorption as well as a tunable excitation frequency. Here, the conceptually different route of solely tweaking the randomness of the complex scattering environment in order to achieve PA is proposed. An experimental proof-ofconcept in the microwave domain is provided where the randomness of a threedimensional chaotic cavity is tuned with programmable meta-atom inclusions. The achievability and extreme sensitivity of the PA condition are systematically investigated. The presented technique can impose a PA condition at over hundred distinct frequencies within a small frequency band, enabling the proposal and experimental demonstration of a concrete practical application: receiver-powered secure wireless communication in a complex scattering enclosure. The presented fundamentally new perspective on PA applies to all types of wave phenomena; the experimental results foreshadow the large potential of this novel tool for minute wave control in sensing, communication and energy transfer.
Fichier principal
Vignette du fichier
Revised Article 2 - Production File.pdf (1.03 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03850385 , version 1 (13-11-2022)

Identifiants

Citer

Mohammadreza F. Imani, David R Smith, Philipp del Hougne. Perfect Absorption in a Disordered Medium with Programmable Meta‐Atom Inclusions. Advanced Functional Materials, 2020, 30 (52), pp.2005310. ⟨10.1002/adfm.202005310⟩. ⟨hal-03850385⟩
43 Consultations
36 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More