Work

Emergence of Multiple Polaritonic States of Water‐in‐Salt in Cavity

Year: 2026

Type: article

Abstract: ABSTRACT Water‐in‐salt electrolytes exhibit multiple spectroscopically isolated OH stretching modes owing to spatially and temporally isolated water species. Here we show that these modes couple cooperatively to a Fabry–Perot cavity, yielding well‐resolved collective polaritonic states. These characteristics provide an insight to distinguishing the light–matter modes of water which have remained unresolved due to the common assumption of homogeneous broadening. This demonstrates that vibrational polariton formation in aqueous media is dictated by the vibrational heterogeneity that remains spectroscopically distinguishable whenever structural exchange occurs more slowly than the light–matter coupling timescale, establishing water‐in‐salt electrolytes as an ideal platform for disentangling multi‐mode light–matter interactions in molecular liquids.

Source: Nanophotonics

DOI: 10.1002/nap2.70256

Authors: Tomohiro Fukushima, Keiji Moriya, Soushi Yoshimitsu, Masaki Itatani, Kei Murakoshi

Institutions: Hokkaido University, Japan Science and Technology Agency

Language: English

Topic: Strong Light-Matter Interactions

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,995

Funder: Japan Society for the Promotion of Science