Exciton, polariton, microcavity, spectroscopy, semiconductor, interaction. These were usually measured when the conduction band is empty, making the single polariton physics a simple singlebody problem. Analysis of pump fluencedependent fluorescence measurements. 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. The members of the team associated with the experiment were georgi gary rozenman, katherine akulov, adina golombek and tal schwartz from telaviv university. Tamm plasmons and exciton polaritons in hybride microcavities. In this work, we report on the initial study of excitonpolariton dynamics in strongly coupled organic microcavities. Complete architecture of integrated photonic circuits based on and and not logic gates of exciton polaritons in semiconductor microcavities. Pdf condensation of semiconductor microcavity exciton polaritons. 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. The excitonpolaritons in microcavities is a unique bosonic system which demonstrates remarkable quantum coherent phenomena at very high temperatures.
Plasmonexciton polaritons arise from the coherent coupling of the localized plasmon of metal nanoparticles and the exciton of nearby resonant nanoemitters. Frenkelexcitonpolaritons in organic microcavities article pdf available in brazilian journal of physics 362. At the bottom of the trap where the coupling is strongest, line narrowing. We discuss properties of polariton lasers and condensates in gaas based microcavities. Exciton polaritons in single and coupled microcavities m. Excitonpolaritons or polaritons for short are bosonic quasiparticles that exist inside semiconductor microcavities, consisting of a superposition of an exciton and a cavity photon. Additional light waves and polaritons excitonpolaritons in semiconductor microcavities observations of excitonpolariton. Pdf superfluidity and hydrodynamic topological excitations of microcavity polaritons. Multistability of cavity excitonpolaritons affected by.
Characteristics of exciton polaritons in znobased hybrid microcavities jun rong chen, tienchang lu, yung chi wu, shiang chi lin, wen feng hsieh, shing chung wang, hui deng corresponding author for this work. In general, excitonpolaritons should relax faster than photons since thermalization occurs only through their exciton component by excitonexciton interaction and excitonphonon interaction. Strong excitonphoton coupling in microcavities was rst reported. Hybrid polaritons in strongly coupled microcavities. Researchers look for this state in a solid state optical microcavity coupled with quantum well excitons. Halfskyrmion spin textures in polariton microcavities. The strong coupling in these novel systems is between a quantum well exciton and the confined photon field. Due to the similarities with three dimensional polaritons these states were called cavity. We show that in microcavities having a small rabi splitting typically gaas cavities with a single quantum well, this reservoir can be efficiently populated by polaritonphonon scattering.
Ultrastrong plasmonexciton coupling by dynamic molecular. The pl follows the lp branch and no emission from the up branch is observed. Strong exciton photon coupling at room temperature in. University tamm plasmons and exciton polaritons in hybride microcavities of bremen k.
Here, the authors demonstrate a subwavelengththick, one. Excitonpolariton condensation in semiconductor microcavities. The peak wavelength of the pl emission from the hybrid state is signi. Bragg reflector dbr based microcavities are most commonly used, since they can provide near unity. In the research field of microcavity polaritons, distributed. Superfluidity of polaritons in semiconductor microcavities. Invited paper exciton polaritons in single and coupled. Polariton superfluid is predicted to be a state of the excitonpolaritons system that combines the characteristics of lasers with those of excellent electrical conductors. Review articles, book chapters and conference proceedings. This study suggests that excitonexciton annihilation is a loss process which can significantly increase the lasing threshold in polariton microcavities. The idea is to create an ensemble of particles known as excitonpolaritons and trap them. The phenomena arise from the bosonic character of the coupled excitonphoton modes of the system.
Excitonpolaritons in organic semiconductor optical. Frenkel excitonpolaritons in organic microcavities hashem zoubi and g. Our recent experiments with excitonpolaritons in the stress trap have shown compelling evidence of bec. 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. Excitonlight coupling in single and coupled semiconductor microcavities. Baumberg1 1cavendish laboratory, university of cambridge, cambridge cb3 0he, united kingdom 2department of materials science and. Request pdf on jan 1, 2012, vladislav timofeev and others published exciton polaritons in microcavities find, read and cite all the research you need on researchgate. Strong excitonphoton coupling in anthradithiophene. Microscopic description of excitonpolaritons in microcavities. The results are compared with conventional distributed bragg reflectors. Oriented polaritons in stronglycoupled asymmetric double quantum well microcavities gabriel christmann,1,a alexis askitopoulos,2 george deligeorgis,3 zacharias hatzopoulos,3 simeon i. Potential applications of the boseeinstein condensation and superfluidity of excitonpolaritons are. Excitonpolaritons are hybrid lightmatter quasiparticles formed by strongly interacting photons and excitons electronhole pairs in semiconductor microcavities.
In this talk we will discuss the recent progress on the dynamic condensation of excitonpolaritons and the application to quantum emulation of many body physics. The boseeinstein condensation bec and superfluidity. They have emerged as a robust solidstate platform for nextgeneration optoelectronic applications as well as for fundamental studies of quantum manybody physics. The first indication of spontaneous quantum degeneracy of polaritons was the observation of stimulated emission under nonresonant pumping in cdte microcavities 18. Ultrafast polariton dynamics in strongly coupled zinc. Excitonpolaritons in planar microcavities previous work. Advanced solid state physics plasmons, polaritons knez. Semiconductor microcavities can host polaritons formed by strong excitonphoton coupling, yet they may be plagued by scalability issues.
Recently, the studies of the excitonpolariton have been receiving a great deal of attention in terms of both fundamental physics and potential applications. Strong excitonphoton coupling in anthradithiophene microcavities. When a sufficiently highquality microcavity is nearly resonant. In solidstate systems, it has been anticipated that exciton polaritons in semiconductor microcavities should behave as an unusual quantum fluid68, with unique properties stemming from its intrinsically nonequilibrium nature. In order to extract the excitonic and photonic fractions of excitonpolaritons, we determined the hopfield coefficients n by using the following equation 2 2. The large exciton binding energies and oscillator strengths of organic semiconductors have allowed the realization of strong excitonphoton coupling at room temperature in microcavities containing a wide variety of materials. Oriented polaritons in stronglycoupled asymmetric double. Here we show theoretically that the introduction of a cold electron gas into such structures induces efficient electronpolariton scattering.
The radiated light from such a system shares many similarities with the light emitted from a conventional photon laser, even though the decay of the polaritons is a spontaneous process. We investigate alternative microcavity structures for excitonpolaritons consisting of photonic crystals instead of distributed bragg reflectors. Within the renormalized theory, we exactly solve the problem of a single exciton polariton for the first time and obtain the full spectral response. Multivalley engineering in semiconductor microcavities nature.
On the condensation of exciton polaritons in microcavities. Electron and photon confinement in semiconductor nanostructures is one of the most active areas in solid state research. Influence of multiexciton correlations on nonlinear. In the past decade, there has been a burst of new and fascinating physics. Recently, researchers measured the longrange transport in organic materials coupled to optical microcavities and showed that excitonpolaritons propagate over several microns. Nanophotonics 2020 aop research article francesco todisco, radu malureanu, christian wolff, p. We begin by considering a one dimensional 1d system of cavity photons and quantumwell qw. The very small polariton effective mass and the interactions brought respectively by the photon and excitonic. Spatial distribution of strong and weak coupled excitonpolaritons in semiconductor microcavities. Fdtd and transfer matrix methods for evaluating the. Revealing the dark side of a bright exciton polariton. The study of exciton polaritons has revealed a wealth of rich phenomena such as boseeinstein condensation in the solid state20, polariton super.
The boseeinstein condensation bec and superfluidity, polariton lasing, parametric scattering and amplification, polariton spin switching, optical spin hall effect oshe. Strong exciton photon coupling at room temperature in microcavities containing twodimensional layered perovskite compounds. A typical gaasbased microcavity is shown schemati cally in fig. The ability to manipulate and control the polariton dispersions in microcavities is shown to be a key factor underlying the new observations. The coupling between a 2d semiconductor quantum well and an optical cavity gives rise to combined lightmatter excitations, the excitonpolaritons. The full text of this article is available in pdf format. We describe the fabrication of onedimensional quantum microcavities containing two different layers of molecular jaggregates. Pdf a phase transition from a classical thermal mixed state to a quantum mechanical pure state of exciton polaritons is observed in a gaas multiple. Spatial distribution of strong and weak coupled exciton. Complete architecture of integrated photonic circuits. Boseeinstein condensation of exciton polaritons nature. Polariton interactions in semiconductor microcavities emconsulte.
Spin currents of exciton polaritons in microcavities with 110oriented quantum wells. However it was not until 1992 that improvements in growth technology resulted in the advent of strong coupling in semiconductor microcavities. We explain underlying physics of excitonpolariton formation in a semiconductor microcavity. The relaxation bottleneck present in the dispersion relation of exciton polaritons in semiconductor microcavities has prevented the realization of low threshold lasing based on excitonpolariton condensation. In particular, the properties of polaritons to form a boseeinstein condensate may lead to the realization of low threshold polariton lasers 5. From equilibrium to nonequilibrium, and vice versa p. We show that strong coupling can occur between the confined cavity photon mode and the two different molecular exciton modes, leading to. Strong excitonphoton coupling in open semiconductor.
Finitedifference timedomain simulations and scattering transfer matrix methods are used to evaluate the cavity performance. In general, the cavity excitonpolaritons are a coherent superposition of both cavity mode polarizations and of both davydov exciton branches. The behavior of such systems is strictly defined by the initial choice of the metallic and excitonic materials, with only weak control possibilities, essentially limited to polarizationrelated effects or photoswitchable molecules. Alternatively, you can download the file locally and open with any standalone pdf reader. Magnetic and electric mieexciton polaritons in silicon. On the physics of polariton interactions infoscience.
Vortices in spontaneous boseeinstein condensates of excitonpolaritons. Characteristics of excitonpolaritons in znobased hybrid. Stimulated polariton scattering in semiconductor microcavities is reported. Advanced solid state physics plasmons, polaritons knez daniel 0530431 the peaks correspond to certain modes with a certain plasma frequency.
We consider the influence of the exciton reservoir on the energy shifts of the resonantly pumped polariton modes. Pdf frenkelexcitonpolaritons in organic microcavities. This has stimulated the quest for an experimental demonstration of superfluidity effects in polariton systems9. Spatial distribution of strong and weak coupled exciton polaritons in semiconductor microcavities dario ballarini, alberto amo, daniele sanvitto, luis vin. An excitonpolariton has an effective mass of four orders of magnitude.
504 564 153 320 978 198 295 341 770 322 145 860 446 943 1048 291 726 614 134 368 444 427 1453 84 1124 1074 680 362