The past 30 years have witnessed remarkable developments of microcavity exciton–
polaritons, which have made a great impact on photonics and optoelectronics from …

Semiconductor lasers are ubiquitous in modern science and technology for they are
compact, fast, and efficient. They require relatively low power and thus are well suited for …

Quantum fluids exhibit quantum mechanical effects at the macroscopic level, which contrast
strongly with classical fluids. Gain-dissipative solid-state exciton-polaritons systems are …

We consider exciton polaritons in a zigzag chain of coupled elliptical micropillars subjected
to incoherent excitation. The driven-dissipative nature of the system along with the naturally …

In this work, we observe natural exceptional points in the excitation spectrum of an exciton–
polariton system by optically tuning the light–matter interactions. The observed exceptional …

Spectra of low-lying elementary excitations are critical to characterize properties of bosonic
quantum fluids. Usually these spectra are difficult to observe, due to low occupation of non …

Topological insulators are a class of electronic materials exhibiting robust edge states
immune to perturbations and disorder. This concept has been successfully adapted in …

Characterizing elementary excitations in quantum fluids is essential to study their collective
effects. We present an original angle-resolved coherent probe spectroscopy technique to …

We use a recently developed high-resolution coherent probe spectroscopy method to
investigate the dispersion of collective excitations of a polaritonic quantum fluid. We …

The elementary excitations in weakly interacting quantum fluids have a nontrivial nature
which is at the basis of defining quantum phenomena such as superfluidity. These …