We demonstrate strong coupling between a surface plasmon and intersublevel transitions in self-assembled InAs quantum dots. The surface plasmon mode exists at the interface between the semiconductor emitter structure and a periodic array of holes perforating a metallic Pd/Ge/Au film that also serves as the top electrical contact for the emitters. Spectrally narrowed quantum-dot electroluminesce...

The cavity quantum electrodynamics (QED) system is a promising platform for optics and information experiments. Its core the strong coupling between atoms optical cavity, which causes difficulty in overlap antinode of mode. Here, we use programmable movable dipole trap to load cold atomic ensemble into an fiber microcavity realize strength can be improved by polarization gradient cooling adiaba...

The vacuum Rabi splitting of polaritonic eigenmodes in semiconductor microcavities scales with the square root oscillator strength, as predicted by coupled model and confirmed many experiments. We show here that law is no more applicable if becomes comparable or larger than stop-band width Bragg mirrors forming cavity. Once strength large enough, material hosting excitons hybridises quasi-conti...

We demonstrate trapping of a single 85Rb atom at distance 200 nm from the surface whispering-gallery-mode bottle microresonator. The is trapped in an optical potential, which created by retroreflecting red-detuned focused laser beam resonator surface. counteract trap-induced light shift atomic transition frequency superposing second with suitably chosen power and detuning. This allows us to obs...

We measure the transmission spectrum of an optical cavity filled with two-level atoms. For small intensities, the coupling between atoms and a single mode of the cavity splits the spectrum into two normal modes: the vacuum Rabi peaks. We gradually decouple the system in two ways and study the evolution of the vacuum Rabi peaks. First we lower the atom-cavity coupling frequency through its inten...

The quantum properties of electromagnetic, mechanical or other harmonic oscillators can be revealed by investigating their strong coherent coupling to a single quantum two level system in an approach known as cavity quantum electrodynamics (QED). At temperatures much lower than the characteristic energy level spacing the observation of vacuum Rabi oscillations or mode splittings with one or a f...

We report picosecond control of excitonic dressed states in a single semiconductor quantum dot. A strong laser pulse couples the exciton and biexciton states, to form an Autler-Townes doublet of the neutral exciton transition. The Rabi-splitting, and hence the admixture of the dressed states follows the envelope of the picosecond control laser. We create a superposition of dressed states, and o...

We present an exact analytical solution of the anisotropic Hopfield model, and we use it to investigate in detail spectral thermometric response two ultrastrongly coupled quantum systems. Interestingly, show that depending on initial state system, vacuum Rabi splitting manifests significant asymmetries may be considered signatures counterintuitive decoupling effect. Using system as a thermomete...