The absorption of water waves is the process through which water waves lose their energy, thus reducing their impact on shores or other solid structures surrounding them. Enabling this absorption process in real-world settings could help protect coasts and structures from damage caused by waves during extreme weather conditions.
“We’ve been working for almost 20 years on water wave-related issues, and for the last five years or so we focused on problems specifically linked to the absorption of these waves for the protection of coasts or offshore structures,” Agnès Maurel, co-author of the paper, told Phys.org. “To this end, we have developed strategies based on resonant mechanisms, as is the case in this study.”
In their paper, Maurel and her colleagues introduced new strategy for realizing the perfect resonant absorption of guided water waves, which is based on a resonant effect known as Autler-Townes splitting. This is a physical effect occurring in two-level resonant systems, which is characterized by a splitting of two transition states into smaller “doublet” states separated by the a so-called Rabi oscillation.
Autler-Townes splitting was realized and observed in various physical systems, ranging from radio frequency sources to lasers and atoms. As part of their study, Maurel and her colleagues tried to leverage this well-established effect to control the propagation of guided water waves.
“This experimental achievement stems from a theoretical analysis of the resonant mechanism we published last year, which we adapted for the specific purpose of absorbing water waves,” Maurel explained. “Léo-Paul Euvé, through his innovative approach to implementing experiments and optical measurements in the laboratory, ultimately managed to demonstrate the effectiveness of this mechanism.”
2023-12-14 23:41:03
Original from phys.org rnrn