Microcavities

Kavokin, Alexey; Baumberg, Jeremy J.; Malpuech, Guillaume; Laussy, Fabrice P.

doi:10.1093/oso/9780198782995.001.0001

Cited by 477 publications

(563 citation statements)

References 2 publications

Supporting

Mentioning

549

Contrasting

Unclassified

Order By: Relevance

“…They are widely utilized in state-of-the-art vertically emitting microcavity lasers [1], optical filters, spin-photon interfaces [2] and they might also be useful for increasing the efficiency of solar cells [3,4]. However, the very high quality factors that can be provided by DBR-based microcavity structures also explains their important role in fundamental semiconductor optics, in particular in the research field of lightmatter interaction in semiconductors [5]. Here, DBRs are commonly sandwiching an optical defect layer which breaks the translation symmetry of the system.…”

Section: Introductionmentioning

confidence: 99%

Quantum dot micropillar cavities with quality factors exceeding 250,000

et al. 2016

View full text Add to dashboard Cite

Abstract:We report on the spectroscopic investigation of quantum dot -micropillar cavities with unprecedented quality factors. We observe a pronounced dependency of the quality factor on the measurement scheme, and find that significantly larger quality factors can be extracted in photoreflectance compared to photoluminescence measurements. While the photoluminescence spectra of the microcavity resonances feature a Lorentzian lineshape and Q-factors up to 184,000 (±10,000), the reflectance spectra have a Fano-shaped asymmetry and feature significantly higher Q-factors in excess of 250,000 resulting from a full saturation of the embedded emitters. The very high quality factors in our cavities promote strong light-matter coupling with visibilities exceeding 0.5 for a single QD coupled to the cavity mode.

show abstract

Section: Introductionmentioning

confidence: 99%

Quantum dot micropillar cavities with quality factors exceeding 250,000

et al. 2016

View full text Add to dashboard Cite

show abstract

mentioning

confidence: 99%

“…Such coupled fields can be conveniently provided in the laboratory by polaritons [9], the quantum superposition of the spatially extended light ψ C (x, t) and matter fields ψ X (x, t), cf. Fig 1. They find their most versatile and tunable implementation in semiconductors where excitons (electron-hole pairs) of a quantum well are coupled to the photons of a single-mode of a microcavity.…”

mentioning

confidence: 99%

Self-Interfering Wave Packets

Colas

Laussy

2016

Phys. Rev. Lett.

Self Cite

View full text Add to dashboard Cite

We study the propagation of non-interacting polariton wavepackets. We show how two qualitatively different concepts of mass that arise from the peculiar polariton dispersion lead to a new type of particle-like object from non-interacting fields-much like self-accelerating beams-shaped by the Rabi coupling out of Gaussian initial states. A divergence and change of sign of the diffusive mass results in a "mass wall" on which polariton wavepackets bounce back. Together with the Rabi dynamics, this yield propagation of ultrafast subpackets and ordering of a spacetime crystal.Field theory unifies the concepts of waves and particles [1]. In quantum physics, this brought at rest the dispute of the pre-second-quantization era, on the nature of the wavefunction. As one highlight of this conundrum, the coherent state emerged as an attempt by Schrödinger to prove Heisenberg that his equation is suitable to describe particles since some solutions exist that remain localized [2]. However, the reliance on an external potential and the lack of other particle properties-like resilience to collisions-makes this qualification a moot point and quantum particles are now understood as excitations of the field. The deep connection between fields and particles is not exclusively quantum and classical fields also provide a robust notion of particles, most famously with solitons [3]. The particle cohesion is here assured selfconsistently by the interactions, allowing free propagation and surviving collisions with other solitons (possibly with a phase shift). For a long time, this has been the major example of how to define a particle out of a classical field, until Berry and Balazs discovered the first case of a similar behaviour in a non-interacting context: the Airy beams [4]. These solutions to Schrödinger equation (or equivalently through the Eikonal approximation, to Maxwell equations) retain their shape as they propagate as a train of peaks (or sub-packets) and also exhibit self-healing after passing through an obstacle [5]. The ingredient powering these particle behaviours is phaseshaping, assuring the cohesion by the acceleration of the sub-packets inside the mother packet. The solution was first regarded as a mathematical curiosity as it is not normalizable, till a truncated version was experimentally realized and shown to exhibit this dramatic phenomenology but for a finite time [6]. The Airy beam is now a recognized particle-like object, in some cases emerging from fields that quantize elementary particles [7], thus behaving like a meta-particle. It is in fact but one example of a full family of so-called "accelerating beams" [8], that all similarly endow linear fields with particle properties: shape-preservation and resilience to collisions.In this Letter, we add another member to the family of mechanisms that provide non-interacting fields with particle properties. Namely, we show that two coupled fields of different masses can support self-interfering wavepack- Effective masses for the LPB as a function of momentum: in pur...

show abstract

“…To reveal its dispersion properties, we follow the references [5][6][7] and use the convenient transfer matrix method [13]. Figure 2a demonstrates dispersions of the three lower photon eigenmodes of the infinite 1D photonic crystal.…”

Section: Bragg Polaritons With Convex Dispersionmentioning

confidence: 99%

Control of propagation of spatially localized polariton wave packets in a Bragg mirror with embedded quantum wells

Sedova

Chestnov

Аракелян

et al. 2018

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

Abstract. We considered the nonlinear dynamics of Bragg polaritons in a specially designed stratified semiconductor structure with embedded quantum wells, which possesses a convex dispersion. The model for the ensemble of single periodically arranged quantum wells coupled with the Bragg photon fields has been developed. In particular, the generalized GrossPitaevskii equation with the non-parabolic dispersion has been obtained for the Bragg polariton wave function. We revealed a number of dynamical regimes for polariton wave packets resulting from competition of the convex dispersion and the repulsive nonlinearity effects. Among the regimes are spreading, breathing and soliton propagation. When the control parameters including the exciton-photon detuning, the matter-field coupling and the nonlinearity are manipulated, the dynamical regimes switch between themselves.

show abstract

Microcavities

Cited by 477 publications

References 2 publications

Quantum dot micropillar cavities with quality factors exceeding 250,000

Quantum dot micropillar cavities with quality factors exceeding 250,000

Self-Interfering Wave Packets

Control of propagation of spatially localized polariton wave packets in a Bragg mirror with embedded quantum wells

Contact Info

Product

Resources

About