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Polaritons disorder effects

Finding polariton states in disordered planar microcavities microscopically is a difficult task which do not attempt here. As a first excursion into the study of disorder effects on polariton dynamics, here we will follow (32) to explore the dynamics in a simpler microscopic model of a ID microcavity. Such microcavities are interesting in themselves and can have experimental realizations from the results known in the theory of disordered systems (39) one can also anticipate that certain qualitative features may be common for ID and 2D systems (38). [Pg.293]

Isotopically Mixed Crystals Excitons in LiH Crystals Exciton-Phonon Interaction Isotopic Effect in the Emission Spectrum of Polaritons Isotopic Disordering of Crystal Lattices Future Developments and Applications Conclusions... [Pg.196]

Note that disorder, which was neglected above, is also able to destroy coherent superradiant emission of ID and 2D polaritons. This can happen when the uncertainty of the exciton wavevector arising due to scattering of an exciton by disorder will be of the order of value Eexc/hc. A quantitative theory of this effect has been developed in the paper by Orrit et al. (23). [Pg.136]

A generalization of biphonon theory beyond the Van Kranendonk model was made later (14)—(17). Subsequently, the effect of biphonons on polariton dispersion in the spectral region of two-particle states was investigated in a number of papers (18)—(22), and the contribution of biphonons to the nonlinear polarizability of a crystal was discussed in (23)-(25). Problems of the theory of local and quasilocal biphonons in disordered media were discussed in a number of papers (14), (26) -(28). The influence of anharmonicity in crystals on the spectra of inelastically scattered neutrons was considered by Krauzman et al. (29), Prevot et al. (30), and in Ref. (31). [Pg.168]

In this section we examine the solutions of Maxwell s equations for a system with a broad and dispersionless electronic resonance. We show that these conditions result in the appearance of the end-points of the lower and upper polariton branches. These end-points restrict the intervals in which the polariton states have well-defined wavevectors. This consideration is applicable, in particular, to the disordered system of J-aggregates since each J-aggregate chain possesses rather narrow electronic transitions instead of broad dispersion (Fig. 10.3). The disorder present in the system does not influence the following arguments, since for small-cavity photon wavevectors, the system can be treated as effectively homogeneous. [Pg.280]

The lower-energy part of the LP branch, however, corresponds to the polariton states T (10.52) in which the exciton and photon are strongly coupled (7 = 0.15 > A — e = 0.1 eV) with comparable weight contributions in Tp and Hie. A dramatic effect of the disorder is in the strongly localized character of the polaritonic eigenstates near the bottom of the LP branch, as illustrated in Fig. 10.7(a) (needless to say the same behavior is observed for the states near... [Pg.295]


See other pages where Polaritons disorder effects is mentioned: [Pg.300]    [Pg.121]    [Pg.154]    [Pg.205]    [Pg.268]    [Pg.295]   
See also in sourсe #XX -- [ Pg.235 ]




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