Coherent interaction of a-few-electron quantum dot with a terahertz optical resonator

Abstract

We have investigated light-matter hybrid excitations in a quantum dot (QD)-terahertz (THz) optical resonator coupled system. We fabricate a gate-defined QD in the vicinity of a THz split-ring resonator (SRR) by using a AlGaAs/GaAs two-dimensional electron system (2DES). By illuminating the system with THz radiation, the QD shows a current change whose spectrum exhibits coherent coupling between the electrons in the QD and the SRR as well as coupling between the 2DES and the SRR. The latter coupling enters the ultrastrong coupling regime and the coupling between the QD and the SRR is also very close to the ultrastrong coupling regime, despite the fact that only a few electrons reside in the QD.

References in corpus (10)

• Quantum nature of a strongly-coupled single quantum dot-cavity system
• Semiconductor Spin Qubits
• Circuit Quantum Electrodynamics with a Spin Qubit
• Ultra-Strong Light-Matter Coupling Regime with Polariton Dots
• Strong Coupling of a Single Electron in Silicon to a Microwave Photon
• In situ reduction of charge noise in GaAs/AlGaAs Schottky-gated devices
• Ultra-Strong Light-Matter Coupling in Deeply Subwavelength THz LC resonators
• An ultrastrongly coupled single THz meta-atom
• Influence of contacts on the microwave response of a two-dimensional electron stripe
• Cavity-mediated electron hopping in disordered quantum Hall systems

Cited by in corpus (6)

• Electron conductance and many-body marker of a cavity-embedded topological 1D chain
• Quantum phase transitions and cat states in cavity-coupled quantum dots
• Cavity-modified quantum electron transport in multi-terminal devices and interferometers
• Ultrastrong light-matter coupling in near-field coupled split-ring resonators revealed by photocurrent spectroscopy
• Gate-tunable single terahertz meta-atom ultrastrong light-matter coupling
• Nonlinear Terahertz Electroluminescence from Dirac Landau Polaritons