Gate-tunable single terahertz meta-atom ultrastrong light-matter coupling
arXiv:2511.03664 · doi:10.1021/acsphotonics.5c02675
Abstract
We study the electrical tunability of ultrastrong light-matter interactions between a single terahertz circuit-based complementary split ring resonator (cSRR) and a two-dimensional electron gas. For this purpose, transmission spectroscopy measurements are performed under the influence of a strong magnetic field at different set points for the electric gate bias. The resulting Landau polariton dispersion depends on the applied electric bias, as the gating technique confines the electrons in-plane down to extremely sub-wavelength dimensions as small as d = 410 nm. This confinement allows for the excitation of standing plasma waves at zero magnetic field and an effective tunability of the electron number coupled to the THz resonator. This allows the normalized coupling strength to be tuned in-situ from = 0.46 down to = 0.18. This is the first demonstration of terahertz far-field spectroscopy of an electrically tunable interaction between a single terahertz resonator and electrons in a GaAs quantum well heterostructure.
References in corpus (19)
- Ultrastrong coupling between light and matter
- Quantum Transport in Semiconductor Nanostructures
- Ultrastrong coupling regimes of light-matter interaction
- Quantum vacuum properties of the intersubband cavity polariton field
- Deep Strong Coupling Regime of the Jaynes-Cummings model
- Ultra-Strong Light-Matter Coupling Regime with Polariton Dots
- Terahertz light-matter interaction beyond unity coupling strength
- Quantum Electrodynamic Control of Matter: Cavity-Enhanced Ferroelectric Phase Transition
- Ultrastrong coupling between a cavity resonator and the cyclotron transition of a 2D electron gas in the case of integer filling factor
- Drude weight, cyclotron resonance, and the Dicke model of graphene cavity QED
- Polaritonic non-locality in ultrastrong light-matter coupling
- Cavity QED of the graphene cyclotron transition
- Ultra-Strong Light-Matter Coupling in Deeply Subwavelength THz LC resonators
- An ultrastrongly coupled single THz meta-atom
- Electrical Tuning of Terahertz Plasmonic Crystal Phases
- Enhanced fractional quantum Hall gaps in a two-dimensional electron gas coupled to a hovering split-ring resonator
- Cavity engineering of solid-state materials without external driving
- Observation of the Magnonic Dicke Superradiant Phase Transition
- Coherent interaction of a-few-electron quantum dot with a terahertz optical resonator