Nature Physics· 2026Q1
Cavity-less Brillouin strong coupling in a solid-state continuous system
- 1citations
- Q1SCImago
- 2026year
Short summary
Researchers demonstrate strong coupling between optical and acoustic fields in a cavity-less solid-state system using a single pass through an optical waveguide.
AI-generated from the title and abstract; the full text is not read.
Key points
- Demonstrated strong coupling between optical and acoustic fields in a cavity-less, continuous solid-state system.
- Achieved this coupling via anti-Stokes Brillouin–Mandelstam scattering in a nonlinear fiber at cryogenic temperatures.
- Observed spectral splitting of the optoacoustic response and measured avoided crossing of hybrid optoacoustic modes.
- The system uses a single pass through an optical waveguide, unlike previous resonator-based approaches.
AI-generated from the title and abstract; the full text is not read.
Abstract
Abstract Strong coupling between two systems allows them to exchange coherent information before the systems decohere. This important regime in light–matter interactions has predominantly been reached in optical resonator configurations. Here we demonstrate strong coupling between optical and acoustic fields within a continuum of modes in a cavity-less configuration after a single pass through an optical waveguide. The underlying physical effect of anti-Stokes Brillouin–Mandelstam scattering in a highly nonlinear fibre at cryogenic temperature allows us to experimentally demonstrate strong coupling in a waveguide scenario. We show the splitting of the optoacoustic spectral response and introduce a technique to measure the avoided crossing of hybrid optoacoustic modes via forced detuning. This demonstration opens a path towards in-line acoustic-wave-based quantum signal processing in waveguide systems.
The authors' abstract, as published at the source. Nature Physics, 2026 · DOI ↗
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Field: Atomic and Molecular Physics, and Optics
Atomic and Molecular Physics, and OpticsPhysics and Astronomy