Microcavities in Ecole Polytechnique Fédérale de Lausanne, Ecole Polytechnique (France) and elsewhere: past, present and future

Abstract

We present an overview of semiconductor microcavity research, with emphasis on the activities carried out at Ecole Polytechnique Fédérale de Lausanne and Ecole Polytechnique (Palaiseau, France).

Intriguing Optoelectronic Properties of Metal Halide Perovskites

“…An example is given for GaAs measured at a lattice temperature of 1.2 K in Figure 17A. 224 A number of distinct features can be readily observed. These include transitions corresponding to the first, second, and third free exciton quantum states (n = 1, 2, and 3), impurity-bound excitons (D 0 -X), and the onset of continuum absorption (n = ∞).…”

“…Typically, this can be overcome by recording spectra at cryogenic temperatures to minimize thermal broadening, revealing hydrogenic lines and allowing reliable determination of binding energy ( E b ) using eq . An example is given for GaAs measured at a lattice temperature of 1.2 K in Figure A . A number of distinct features can be readily observed.…”

Fifteen Years of Microcavity Polaritons

“…The early work by Weisbuch et al already contained all the essential features of the MC-polariton system, including the anticrossing as a function of the exciton-cavity detuning, the dependence of the Rabi splitting on the number of QWs embedded in the cavity and on the exciton and photon linewidths, and finally an analysis in terms of linear response theory. An exciting account of this discovery is given by Claude Weisbuch in this volume [150], together with a short review of the early MC-polariton physics.…”

“…This is not, however, an exhaustive review, as certainly many important topics in polariton research are partially or not at all covered (for example the role of spin and light polarization, for which a starting point might be the contribution by Shelykh et al [136] to the present volume, or the recent progress in developing room-temperature polariton systems, for which the reader can refer to the contribution by Carlin et al [24]), while many others are repeated in the individual contributions to this volume (see e.g. the contributions by R. Houdré [59] and C. Weisbuch [150] to the present volume). It will nevertheless help the reader go through the following chapters, that are individual research reports by the most active researchers in the field.…”

“…It was thanks to these advances that the exciton-photon coupling rate became faster than the damping, and the first strong-coupling sample was produced. The story behind this discovery is told by C. Weisbuch in his contribution to this volume [150].…”