Spin dynamics of exciton polaritons in microcavities. Strong exciton photon coupling at room temperature in microcavities containing twodimensional layered perovskite compounds to cite this article. Polariton polarizationsensitive phenomena in planar semiconductor microcavities. We demonstrate here layerbylayer assembled jaggregate thin films of dedoc cyanine dyes that have high absorption coefficient and controlled thicknesses, leading to adjustable exciton photon coupling and rabi splitting exceeding 400 mev at room temperature in allmetal mirror microcavities. Jun 07, 2017 researchers image quasiparticles that could lead to faster circuits, higher bandwidths posted jun 7, 2017 8. Strong exciton photon coupling at room temperature in. Exciton polaritons in single and coupled microcavities deepdyve. In this regime, formation of partlightpartmatter quasiparticles called excitonpolaritons is observed. Thermodynamics of exciton polaritons in one and two dimensional organic singlecrystal microcavities. Polaritons are excitonphoton hybrid particles that are created when the interaction between light and matter is strong enough. Controlled excitonphoton interaction in semiconductor. In the bistable regime, bright andor dark solitons are found to bifurcate from the homogonous solutions of the two circular polarization modes.
Merging quantum optics with condensed matter physics, ed. Ultrafast changes in the transmitted probe pulse are observed when resonantly injecting polaritons at different points of the lower polariton brunch with short pump pulses. A remarkable feature of exciton polaritons is the strongly spindependent polaritonpolariton interaction, which has been predicted to result in the formation of spin rings in real space shelykh. In semiconductor microcavities, recent discoveries have shown that these polaritons differ completely from excitons in their enormous nonlinear scattering cross sections 2,3 and their bosonic statistics. Gather2 exciton polaritons form upon strongcoupling between electronic excitations of a material and photonic states of a surrounding microcavity. Spontaneous bose coherence of excitons and polaritons science. Citation wen, p, g christmann, j j baumberg, and keith a nelson. Influence of multiexciton correlations on nonlinear. Polariton interactions in semiconductor microcavities emconsulte.
Nov 15, 2002 when the photon energy is comparable to the exciton energy, the curves given by eq. The excitations in the region of the mixing are known as polaritons. Polariton laser and polariton superfluidity in microcavities. Pdf frenkelexcitonpolaritons in organic microcavities. The physics of excitonpolariton condensates physik. Influence of multiexciton correlations on nonlinear polariton dynamics in semiconductor microcavities the mit faculty has made this article openly available. We present the theory of spin relaxation of exciton polaritons treated as a gas of weakly interacting bosons. In the cui active layer, thermal strain removes the degeneracy of the heavyhole hh and lighthole lh excitons at the. Due to the strong coupling between the excitonic and photonic modes, the eigenstates of the microcavities are neither excitons nor photons, but the combination of both, known as excitonpolaritons. Microscopic description of excitonpolaritons in microcavities. Frenkel excitonpolaritons in organic microcavities article pdf available in brazilian journal of physics 362.
Nonlinear polariton localization in strongly coupled driven. Energy relaxation of excitonpolariton condensates in quasi. The modification and control of excitonphoton interactions in semiconductors is of both fundamental1,2,3,4 and practical interest, being of direct relevance to the design of improved light. Theory of excitonpolariton lasing at room temperature in zno. Here, the authors create polaritons in molybdenum diselenideboron. Since the first observation of the strong coupling regime, semiconductor microcavities have become an object of intensive experimental and theoretical studies. Roomtemperature polariton lasing in semiconductor microcavities. Pdf motion of spin polariton bullets in semiconductor.
A monolayer of transition metal dichalcogenide tmdc is shown to be capable of supporting a guided optical mode below the exciton resonance a twodimensional exciton. The strong polaritonpolariton interactions yield rich nonlinearities capable of creating individual optical switches 1,35 and memory elements 6,7 with low threshold power. Controlled excitonphoton interaction in semiconductor bulk microcavities. Spatial distribution of strong and weak coupled exciton. Excitonpolariton wavepackets in semiconductor microwires. At low p, the system is in the strong coupling regime and the lpb emits at 1. These were usually measured when the conduction band is empty, making the single polariton physics a simple singlebody problem. To this end we combine pl experiments with terahertz thz. Control of spontaneous emission in a cavity, often referred to as cavity quantum electrodynamics, is studied for the new system consisting of a microcavity radiation field and quantum well wannier excitons. The signals can be transported along polariton neurons, created with a patterned metal surface.
Nearinfrared excitonpolaritons in strongly coupled singlewalled. Nov 26, 2008 we use the semiclassical boltzmann equations to describe the exciton polariton relaxation in a bulk zno microcavity at room temperature. Sublinear intensity dependence of photoluminescence from organic exciton polariton microcavities under nonresonant excitation in two power regimes is shown. The model is based on the spin density matrix approach in the bornmarkov approximation. Osa vectorial polariton solitons in semiconductor microcavities. Here we use two coupled semiconductor microcavities to investigate the nonlinear localization of polaritons in a novel regime where a single cavity is coherently driven at a frequency just. Pdf we investigate the interaction of excitons in a two dimensional lattice and photons in a planar cavity in the presence of disorder. Pdf this work contains a theoretical analysis of the optical properties of. In this work, we report on the initial study of excitonpolariton dynamics in strongly coupled organic microcavities. Revealing the dark side of a bright exciton polariton. Boseeinstein condensation of excitonpolaritons in organic. Pdf microcavity polaritons in disordered exciton lattices.
The transition from the strong to the weakcoupling regime has been studied measuring the energy of the lpb at k. Fermiedge excitonpolaritons in doped semiconductor. Potential applications of the boseeinstein condensation and superfluidity of excitonpolaritons are discussed. Nearinfrared excitonpolaritons in strongly coupled single. Twodimensional excitonpolariton light guiding by transition metal dichalcogenide monolayers. Motion of spin polariton bullets in semiconductor microcavities. Crossover from exciton to biexciton polaritons in semiconductor microcavities. We use cookies to offer you a better experience, personalize content, tailor advertising, provide social media features, and better understand the use of our services. Excitonexciton annihilation in organic polariton microcavities. Control of spontaneous emission in a cavity, often referred to as cavity quantum electrodynamics, is studied for the new system consisting of a microcavity radiation field and quantum well wannier. Using the dicke model for a lattice of frenkel excitons coupled to a common cavity mode, we explore the. This can lead to polariton lasing, the spontaneous emission of coherent light by condensates of excitonpolaritons 48.
Pdf optical properties of microcavity polaritons researchgate. I a shelykh 1,2, a v kavokin 3,4, yuri g rubo 3,5, t c h liew 6,7 and g malpuech 8. Pdf thermodynamics of excitonpolaritons in one and two. Strong excitonphoton coupling in an organic semiconductor. Nonlinear coupling of polariton and dark exciton states in. May 01, 2000 read exciton polaritons in single and coupled microcavities, journal of luminescence on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
Condensation and superfluidity of polaritons in semiconductor. Scientists model the formation of multivalleys in semiconductor microcavities 25 april 2017 plot of polaritons energy dispersion vs momentum in a semiconductor microcavity, seen from above left and. In this article, we introduce the basic physics of exciton. Keywords lightmatter interaction, organic microcavities, polariton condensation. The interplay of hopping and interactions in coupled photonic resonators gives rise to a number of nonlinear optical phenomena including multistability, selftrapping, and nonlinear josephson oscillations. Excitonpolaritons study in zno based hybrid microcavities yupin lan a, yingyu lai a, siwei huang a, junrong chen a, yungchi wu a, shiangchi lin a, tienchang lu a, shingchung wang a, and wenfeng hsieh a, hui deng b. We consider here the thermodynamics and phasediagram of exciton polaritons formed in lowdimensional organic singlecrystal microcavities. Researchers image quasiparticles that could lead to faster. Swcnts combine the advantageous excitonic properties of. This paper presents numerical studies of vectorial polariton solitons in semiconductor microcavities. This study suggests that exciton exciton annihilation is a loss process which can significantly increase the lasing threshold in polariton microcavities.
Pdf crossover from exciton to biexciton polaritons in. Request pdf microcavities the rapid development of microfabrication and assembly of. Additional light waves and polaritons excitonpolaritons in semiconductor microcavities observations of excitonpolariton. We have investigated the activelayerthickness dependence of excitonphoton interactions in cui microcavities.
It is possible to directly image exciton polaritons thanks to the their photonic. We find that the polariton laser is operating close to the thermodynamic equilibrium in. Microcavity polaritons in disordered exciton lattices. Recently, researchers measured the longrange transport in organic materials coupled to optical microcavities and showed that excitonpolaritons propagate over several microns. Polaritons combine the long spatial coherence of photons with strong. Request pdf polariton laser and polariton superfluidity in microcavities excitons coupled to light in microcavities form excitonpolaritons polaritons having very light effective masses. The boseeinstein condensation bec and superfluidity. The sublinearity is attributed to exciton exciton annihilation, which could compete with polaritonpolariton scattering in these devices. Energy relaxation of excitonpolariton condensates in.
The resulting optical recon gurability of exciton polaritons in semiconductor microcavities therefore is a striking feature which potentially allows one to realize alloptical devices for in formation technology. Using optical signals presents serious advantages and the idea of combining. The members of the team associated with the experiment were georgi gary rozenman, katherine akulov, adina golombek and tal schwartz from telaviv university. Compactons and bistability in excitonpolariton condensates. Exciton, polariton, microcavity, spectroscopy, semiconductor, interaction. Published 1 december 2009 2010 iop publishing ltd semiconductor science and technology, volume 25, number 1. Excitonpolaritons are quantum quasiparticles which are superpositions of cavity photons and excitons electronhole pairs in a semiconductor 20. The bistability in exciton polariton condensates, which manifests itself in the simultaneous existence of two stable and one unstable localized solitons with different amplitudes, widths, and exciton photon fractions under the same physical conditions, strongly depends on the width of the pump beam and is found to disappear. Fermiedge excitonpolaritons in doped semiconductor microcavities with. The integration of tmdc heterostructures in optical microcavities is also an attractive alternative to systems where the strong lightmatter interaction has been studied previously. We present kinetic phase diagrams which report the lasing threshold versus the main sample parameters, such as the polariton lifetime or the value of the rabi splitting.
Their composite nature gives rise to mixed properties characteristic to both light and matter. We present a timeresolved study of energy relaxation and trapping dynamics of polariton condensates in a semiconductor microcavity ridge. The combination of two nonresonant, pulsed laser sources in a gaas ridgeshaped microcavity gives rise to profuse quantum phenomena where the repulsive potentials created by the lasers allow the modulation and control of the polariton flow. Excitonpolaritons study in zno based hybrid microcavities. Control of rabisplitting energies of exciton polaritons in. The full text of this article is available in pdf format. Ultrafast polariton dynamics in strongly coupled zinc. Polariton polarizationsensitive phenomena in planar. Osa adjustable excitonphoton coupling with giant rabi. The coupling between a 2d semiconductor quantum well and an optical cavity gives rise to combined lightmatter excitations, the exciton polaritons. Excitonpolariton localized wave packets in a microcavity.
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