An ultrastrongly coupled single THz meta-atom
arXiv:2110.09776 · doi:10.1038/s41467-022-29974-2
Abstract
Free-space coupling to strongly subwavelength individual optical elements is a central theme in quantum optics, as it allows to control and manipulate the properties of quantum systems. In this work, we show that by combining an asymmetric immersion lens setup and complementary design of metasurfaces we are able to perform THz time-domain spectroscopy of an individual, strongly subwavelength (d/λ0=1/20) meta-atom. We unravel the linewidth dependence of planar metamaterials as a function of the meta-atom number indicating quenching of the Dicke superradiance. On these grounds, we investigate ultrastrongly coupled Landau polaritons at the single resonator level, measuring a normalized coupling ratio of Ω/ω=0.60 resulting from coupling of the fundamental mode to a few thousand electrons. Similar measurements on a low loss, less doped two dimensional electron gas yield a coupling ratio Ω/ω=0.33 with a cooperativity C=4g^2/κγ= 94. Interestingly, the coupling strength of a coupled single resonator is the same as of a coupled array. Our findings pave the way towards the control of light-matter interaction in the ultrastrong coupling regime at the single electron/single resonator level. The proposed technique is way more general and can be useful to characterize the complex conductivity of micron-sized samples in the THz and sub-THz domain.
arXiv comment28 pages, 5 figures
References in corpus (26)
- Ultrastrong coupling regimes of light-matter interaction
- Ultrastrong coupling of the cyclotron transition of a two-dimensional electron gas to a THz metamaterial
- Ultra-Strong Light-Matter Coupling Regime with Polariton Dots
- Electric and magnetic dipole coupling in near-infrared split ring metamaterial arrays
- Terahertz light-matter interaction beyond unity coupling strength
- Collective, Coherent, and Ultrastrong Coupling of 2D Electrons with Terahertz Cavity Photons
- Perfect Reflection of Light by an Oscillating Dipole
- Breakdown of the topological protection by cavity vacuum fields in the integer quantum Hall effect
- Spectral collapse in ensembles of meta-molecules
- Magneto-transport controlled by Landau polariton states
- Ultrastrong Coupling in the Near-field of Complementary Split Ring Resonators
- Ultrastrong coupling between a cavity resonator and the cyclotron transition of a 2D electron gas in the case of integer filling factor
- Ultrahigh Purcell factors and Lamb shifts using slow-light metamaterial waveguides
- Single photon absorption by a single quantum emitter
- Design of a mode converter for efficient light-atom coupling in free space
- Strong extinction of a far-field laser beam by a single quantum dot
- Superradiant Decay of Cyclotron Resonance of Two-Dimensional Electron Gases
- Large collective Lamb shift of two distant superconducting artificial atoms
- Polaritonic non-locality in ultrastrong light-matter coupling
- Landau polaritons in highly non-parabolic 2D gases in the ultra-strong coupling regime
- Direct Measurement of Cyclotron Coherence Times of High-Mobility Two-Dimensional Electron Gases
- Limiting scattering processes in high-mobility InSb quantum wells grown on GaSb buffer systems
- Tailored subcycle nonlinearities of ultrastrong light-matter coupling
- Resonance linewidth and inhomogeneous broadening in a metamaterial array
- Non-Invasive Near-field Spectroscopy of Single Sub-Wavelength Complementary Resonators
- Superradiantly limited linewidth in complementary THz metamaterials on Si-membranes
Cited by in corpus (9)
- Cavity Quantum Electrodynamics with Hyperbolic van der Waals Materials
- Nonperturbative cavity quantum electrodynamics: is the Jaynes-Cummings model still relevant?
- Coherent interaction of a-few-electron quantum dot with a terahertz optical resonator
- An engineered planar plasmonic reflector for polaritonic mode confinement
- Superradiant Quantum Phase transition for Landau Polaritons with Rashba and Zeeman couplings
- Detection of strong light-matter interaction in a single nano-cavity with a thermal transducer
- Ultrastrongly-coupled and Directionally-nonreciprocal Magnon-polaritons in Magnetochiral Metamolecules
- Cavity-Driven Attractive Interactions in Quantum Materials
- Gate-tunable single terahertz meta-atom ultrastrong light-matter coupling