Polariton lasers emit coherent monochromatic light through a spontaneous emission
process. As a rare example of a system in which Bose–Einstein condensation and …

There have been significant recent advances in realizing band structures with geometrical
and topological features in experiments on cold atomic gases. This review summarizes …

Polaritons are quasiparticles that form in semiconductors when an elementary excitation
such as an exciton or a phonon interacts sufficiently strongly with light. In particular, exciton …

Fractals are fascinating, not only for their aesthetic appeal but also for allowing the
investigation of physical properties in non-integer dimensions. In these unconventional …

The distinctive electronic properties of quasicrystals stem from their long-range structural
order, with invariance under rotations and under discrete scale change, but without …

We show that it is possible to have a topological phase in two-dimensional quasicrystals
without any magnetic field applied, but instead introducing an artificial gauge field via …

By Avila's global theory, we analytically reveal that the non-Hermitian mobility edge will take
on a ring structure in the complex plane, which we name as the “mobility ring”. The …

Exciton-polaritons in semiconductor microcavities have become a model system for the
studies of dynamical Bose–Einstein condensation, macroscopic coherence, many-body …

We experimentally explore the dynamical optical hysteresis of a semiconductor microcavity
as a function of the sweep time. The hysteresis area exhibits a double power law decay due …

Theoretical and experimental studies suggest that both Hermitian and non-Hermitian
quasicrystals show localization due to the fractal spectrum and to the transition to diffusive …