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We investigate the conditions yielding plasmon-exciton strong coupling at the single emitter level in the gap between two metal nanoparticles. A quasi-analytical transformation optics approach is developed that makes possible a thorough…

Mesoscale and Nanoscale Physics · Physics 2016-09-07 Rui-Qi Li , D. Hernangómez-Pérez , F. J. García-Vidal , A. I. Fernández-Domínguez

We study the emission from a molecular photonic cavity formed by two proximal photonic crystal defect cavities containing a small number (<3) of In(Ga)As quantum dots. Under strong excitation we observe photoluminescence from the bonding…

We report direct measurement of the dispersion relation of polaritons in GaAs/AlGaAs microcavity structures at room temperature, which clearly shows that the polaritons are in the strong coupling limit. The Rabi splitting of the polariton…

We studied the intensity of resonant Raman scattering due to optical phonons in a planar II-VI-type semiconductor microcavity in the regime of strong coupling between light and matter. Two different sets of independent experiments were…

Strongly Correlated Electrons · Physics 2009-10-20 A. Bruchhausen , L. M. Leon Hilario , A. A. Aligia , A. M. Lobos , A. Fainstein , B. Jusserand , R. Andre

We study theoretically the interactions of excitonic states with surface electromagnetic modes of small-diameter (~1 nm) semiconducting single-walled carbon nanotubes. We show that these interactions can result in strong…

Mesoscale and Nanoscale Physics · Physics 2015-05-13 I. V. Bondarev , K. Tatur , L. M. Woods

We report the fabrication and photoluminescence properties of laterally-coupled GaAs/AlGaAs quantum dots. The coupling in the quantum dot molecules is tuned by an external electric field. An intricate behavior, consisting of spectral line…

Materials Science · Physics 2011-11-09 L. Wang , A. Rastelli , S. Kirawittaya , M. Benyoucef , O. G. Schmidt

We consider the near-resonant interaction between a single atom and a focused light mode, where a single atom localized at the focus of a lens can scatter a significant fraction of light. Complementary to previous experiments on extinction…

We demonstrate control over light-matter coupling at room temperature combining a field effect transistor (FET) with a tuneable optical microcavity. Our microcavity FET comprises a monolayer tungsten disulfide WS$_2$ semiconductor which was…

Mesoscale and Nanoscale Physics · Physics 2019-05-29 Henry A. Fernandez , Freddie Withers , Saverio Russo , William L. Barnes

Strong coupling exhibits unique ability to preserve quantum sates between light and matter, which is essential for the development of quantum information technology. To explore the physical mechanism behind this phenomenon, we employ the…

We investigate the possibility of achieving the strong coupling regime of cavity quantum electrodynamics using rare earth ions as impurities in monolithic optical resonators. We conclude that due to the weak oscillator strengths of the rare…

Quantum Physics · Physics 2015-05-13 D. L. McAuslan , J. J. Longdell , M. J. Sellars

Coherent control of quantum emitters is essential for scalable quantum photonic technologies. The recently proposed swing-up of quantum emitter (SUPER) scheme allows efficient and coherent preparation of single photons via off-resonant,…

Achieving coherent quantum control over massive mechanical resonators is a current research goal. Nano- and micromechanical devices can be coupled to a variety of systems, for example to single electrons by electrostatic or magnetic…

Quantum Physics · Physics 2009-09-23 Simon Groeblacher , Klemens Hammerer , Michael R. Vanner , Markus Aspelmeyer

By analytically solving the quantum Rabi model, we investigate the photonic properties of its ground eigenstate. In particular, we find that in the deep strong coupling regime, where the coupling strength $g$ exceeds the mode frequency…

Quantum Physics · Physics 2024-12-06 Chon-Fai Kam , Xuedong Hu

We investigate the degree of entanglement quantified by the concurrence of photon pairs that are simultaneously emitted in the biexciton-exciton cascade from a quantum dot in a cavity. Four dot-cavity configurations are compared that differ…

Mesoscale and Nanoscale Physics · Physics 2019-06-05 Tim Seidelmann , Florian Ungar , Moritz Cygorek , Alexei Vagov , Andreas M. Barth , Tilmann Kuhn , Vollrath Martin Axt

Multi-phonon physics is an emerging field that serves as a test bed for fundamental quantum physics and several applications in metrology, on-chip communication, among others. Quantum acoustic cavities or resonators are devices that are…

Mesoscale and Nanoscale Physics · Physics 2022-07-27 Vladimir Vargas-Calderón , Herbert Vinck-Posada , J. M. Villas-Boas

We present a circuit-QED scheme which allows to reach the ultrastrong coupling regime of a nondipolar interaction between a single qubit and a quantum resonator. We show that the system Hamiltonian is well approximated by a two-photon…

Quantum Physics · Physics 2018-12-05 Simone Felicetti , Myung-Joong Hwang , Alexandre Le Boité

Plasmonic cavities can be used to control the atom-photon coupling process at the nanoscale, since they provide ultrahigh density of optical states in an exceptionally small mode volume. Here we demonstrate strong coupling between molecular…

Electronic resonances can significantly enhance the photon-phonon coupling in cavity optomechanics, but are normally avoided due to absorption losses and dephasing by inhomogeneous broadening. We experimentally demonstrate that…

Mesoscale and Nanoscale Physics · Physics 2022-12-19 P. Sesin , A. S. Kuznetsov , G. Rozas , S. Anguiano , A. E. Bruchhausen , A. Lemaître , K. Biermann , P. V. Santos , A. Fainstein

We analyze the behavior of systems of two and three qubits made by Josephson junctions, treated in the two level approximation, driven by a radiation mode in a cavity. The regime we consider is a strong coupling one recently experimentally…

Superconductivity · Physics 2007-05-23 Marco Frasca

Controlled non-local energy and coherence transfer enables light harvesting in photosynthesis and non-local logical operations in quantum computing. The most relevant mechanism of coherent coupling of distant qubits is coupling via the…