ZnO nano-pillar Resonators with Coaxial Bragg-Reflectors

2009 ◽  
Vol 1178 ◽  
Author(s):  
Rudiger Schmidt-Grund ◽  
Annekatrin Hinkel ◽  
Helena Hilmer ◽  
Jesus Zúñiga-Pérez ◽  
Chris Sturm ◽  
...  
Keyword(s):  
Strong Coupling ◽  
Coupling Strength ◽  
Strong Coupling Regime ◽  
Emission Rates ◽  
Bragg Reflectors ◽  
Free Standing ◽  
Spatially Resolved ◽  
Pillar Diameter ◽  
Photonic Wire ◽  
Photon Coupling

AbstractWe demonstrate the growth of lateral concentric BR on ZnO nano-pillars. It opens the opportunity to be used for (i) the enhancement of the lateral confinement in classical pillar-resonators in order to increase the emission rates in the regime of weak exciton-photon coupling (Purcell-effect), (ii) to enhance the exciton-polariton coupling strength in the strong-coupling regime, and (iii) to be used for two-dimensional confinement in free-standing photonic wire resonators. Spatially resolved PL experiments in dependence on the pillar diameter and on the temperature provide strong hints for the ZnO nano-pillar resonator being in the strong-coupling regime. The coupling strength can be estimated to be V = 80 meV.

scholarly journals Strong optomechanical coupling at room temperature by coherent scattering

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Andrés de los Ríos Sommer ◽  
Nadine Meyer ◽  
Romain Quidant
Keyword(s):  
Strong Coupling ◽  
Coupling Strength ◽  
Room Temperature ◽  
Quantum Control ◽  
Optical Cavity ◽  
Coherent Scattering ◽  
Strong Coupling Regime ◽  
Cavity Decay ◽  
Decoherence Rate ◽  
Optomechanical Coupling

AbstractQuantum control of a system requires the manipulation of quantum states faster than any decoherence rate. For mesoscopic systems, this has so far only been reached by few cryogenic systems. An important milestone towards quantum control is the so-called strong coupling regime, which in cavity optomechanics corresponds to an optomechanical coupling strength larger than cavity decay rate and mechanical damping. Here, we demonstrate the strong coupling regime at room temperature between a levitated silica particle and a high finesse optical cavity. Normal mode splitting is achieved by employing coherent scattering, instead of directly driving the cavity. The coupling strength achieved here approaches three times the cavity linewidth, crossing deep into the strong coupling regime. Entering the strong coupling regime is an essential step towards quantum control with mesoscopic objects at room temperature.

The multistability in the coupled semiconductor microcavities

2015 ◽  
Vol 13 (07) ◽  
pp. 1550053 ◽  
Author(s):  
Yang Zhang ◽  
Jun Zhang ◽  
Shao-Xiong Wu ◽  
Chang-Shui Yu
Keyword(s):  
Strong Coupling ◽  
Coupling Strength ◽  
Optical Switch ◽  
Pump Laser ◽  
Strong Coupling Regime ◽  
Nonlinear Phenomena ◽  
Potential Applications ◽  
Semiconductor Microcavities ◽  
Coupled Semiconductor

We study the nonlinear phenomena of the coupled semiconductor microcavities driven by coherent lasers in different coupling regimes. It is shown that the bistability and multistability in the strong-coupling regime are gradually generated or eliminated by properly adjusting the coupling strength or the amplitude of the input pump laser. The proposed system serves as a good candidate for the diverse control optical switch and the potential applications.

scholarly journals Microcavity phonon polaritons from the weak to the ultrastrong phonon–photon coupling regime

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
María Barra-Burillo ◽  
Unai Muniain ◽  
Sara Catalano ◽  
Marta Autore ◽  
Fèlix Casanova ◽  
...  
Keyword(s):  
Strong Coupling ◽  
Coupling Strength ◽  
Hexagonal Boron Nitride ◽  
Bulk Material ◽  
Chemical Properties ◽  
Thin Layers ◽  
Phonon Polaritons ◽  
Physical And Chemical ◽  
Photon Coupling ◽  
And Chemical Properties

AbstractStrong coupling between molecular vibrations and microcavity modes has been demonstrated to modify physical and chemical properties of the molecular material. Here, we study the less explored coupling between lattice vibrations (phonons) and microcavity modes. Embedding thin layers of hexagonal boron nitride (hBN) into classical microcavities, we demonstrate the evolution from weak to ultrastrong phonon-photon coupling when the hBN thickness is increased from a few nanometers to a fully filled cavity. Remarkably, strong coupling is achieved for hBN layers as thin as 10 nm. Further, the ultrastrong coupling in fully filled cavities yields a polariton dispersion matching that of phonon polaritons in bulk hBN, highlighting that the maximum light-matter coupling in microcavities is limited to the coupling strength between photons and the bulk material. Tunable cavity phonon polaritons could become a versatile platform for studying how the coupling strength between photons and phonons may modify the properties of polar crystals.

Strong Coupling: Polariton Bose Condensation

2017 ◽  
Author(s):  
Alexey V. Kavokin ◽  
Jeremy J. Baumberg ◽  
Guillaume Malpuech ◽  
Fabrice P. Laussy
Keyword(s):  
Strong Coupling ◽  
Room Temperature ◽  
Elevated Temperatures ◽  
Dissipative System ◽  
Bose Condensation ◽  
Einstein Condensation ◽  
Strong Coupling Regime ◽  
Stimulated Scattering ◽  
Exciton Polaritons ◽  
Bose Einstein

In this Chapter we address the physics of Bose-Einstein condensation and its implications to a driven-dissipative system such as the polariton laser. We discuss the dynamics of exciton-polaritons non-resonantly pumped within a microcavity in the strong coupling regime. It is shown how the stimulated scattering of exciton-polaritons leads to formation of bosonic condensates that may be stable at elevated temperatures, including room temperature.

Strong coupling: resonant effects

2017 ◽  
Author(s):  
Alexey V. Kavokin ◽  
Jeremy J. Baumberg ◽  
Guillaume Malpuech ◽  
Fabrice P. Laussy
Keyword(s):  
Strong Coupling ◽  
Experimental Studies ◽  
Strong Coupling Regime ◽  
Theoretical Studies ◽  
Stimulated Scattering ◽  
Quantum Theories ◽  
Pump Probe ◽  
Exciton Polaritons ◽  
Linear Optical Properties ◽  
Experimental And Theoretical Studies

This chapter presents experimental studies performed on planar semiconductor microcavities in the strong-coupling regime. The first section reviews linear experiments performed in the 1990s that evidence the linear optical properties of cavity exciton-polaritons. The chapter is then focused on experimental and theoretical studies of resonantly excited microcavity emission. We mainly describe experimental configuations in which stimulated scattering was observed due to formation of a dynamical condensate of polaritons. Pump-probe and cw experiments are described in addition. Dressing of the polariton dispersion and bistability of the polariton system due to inter-condensate interactions are discussed. The semiclassical and the quantum theories of these effects are presented and their results analysed. The potential for realization of devices is also discussed.

Strong-coupling regime in pillar semiconductor microcavities

1997 ◽  
Vol 22 (3) ◽  
pp. 371-374 ◽  
Author(s):  
J. Bloch ◽  
R. Planel ◽  
V. Thierry-Mieg ◽  
J.M. Gérard ◽  
D. Barrier ◽  
...  
Keyword(s):  
Strong Coupling ◽  
Strong Coupling Regime ◽  
Semiconductor Microcavities

INDICATIONS OF A ΔI=1/2 RULE IN THE STRONG COUPLING REGIME

1988 ◽  
Vol 03 (06) ◽  
pp. 1385-1412
Author(s):  
IAN G. ANGUS
Keyword(s):  
Lattice Qcd ◽  
Strong Coupling ◽  
Computer Algebra ◽  
Free Parameter ◽  
Hamiltonian Formalism ◽  
Strong Coupling Expansion ◽  
Calculation Scheme ◽  
Strong Coupling Regime ◽  
Weak Decays ◽  
The One

We will attempt to understand the ΔI=1/2 pattern of the nonleptonic weak decays of the kaons. The calculation scheme employed is the Strong Coupling Expansion of lattice QCD. Kogut-Susskind fermions are used in the Hamiltonian formalism. We will describe in detail the methods used to expedite this calculation, all of which was done by computer algebra. The final result is very encouraging. Even though an exact interpretation is clouded by the presence of irrelevant operators, and questions of lattice artifacts, a signal of the ΔI=1/2 rule appears to be observable. With an appropriate choice of the one free parameter, enhancements greater than those observed experimentally can be obtained. We also point out a number of surprising results which we turn up in the course of the calculation.

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