Researchers Observe Floquet Rotational Super-Radiance in 1 Ring of Time-Modulated Resonators
Updated
Updated · Nature.com · Jul 8
Researchers Observe Floquet Rotational Super-Radiance in 1 Ring of Time-Modulated Resonators
3 articles · Updated · Nature.com · Jul 8
Summary
A ring network of time-modulated resonators experimentally produced Floquet rotational super-radiance, giving researchers a lab platform for wave amplification without mechanically spinning matter at extreme speeds.
Spatio-temporal modulation created an effective ultrafast rotation that reached a superluminal regime, where angular-momentum bandgaps formed and enabled parametric extraction of energy from the synthetic rotating medium.
The team said the amplification was angular-momentum selective and confined by a dissipation-shaped spectral bandwidth, linking the effect to non-Hermitian and parametric dynamics in a space-time crystal.
The result addresses a long-standing experimental barrier: conventional rotating systems require impractically high speeds to access the large rotational Doppler shifts predicted to trigger super-radiance.
The work offers a controllable route to study rotational energy transfer and angular-momentum-dependent amplification in time-varying photonic media.