Near-Field Gain and Far-Field Control via a Plasmonic Time Crystal Slab
Abstract
Light-matter interactions can be substantially altered in the presence of time-varying media. We study the interaction between a harmonic electric dipole and a plasmonic time crystal slab. Temporal modulation of the plasma frequency enables near-field gain, allowing the dipole to absorb rather than emit energy, suppressing nonradiative losses. At the parametric resonance condition, the slab radiates strongly to the far field, producing 100% oscillations in the radiated power at distances up to 10 3 times the ε -near-zero wavelength. These findings reveal a new mechanism for controlling light-matter interaction in time-varying plasmonic systems.
Fields of Study & Subjects
Plasmonic and Surface Plasmon Research
Metamaterials and Metasurfaces Applications
Photonic Crystals and Applications
Publication details
- Journal / source
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Volume
- 136
- Issue
- 13
- Publication date
- 23 January 2026
- Language
- EN