摘要
In their recent review article Ghosh et al.provide an overview of room-temperature polaritonics,which may be also referred to as physics of liquid light[1].The quanta of liquid light,exciton polaritons,combine properties of photons and of excitons,electrically neutral semiconductor crystal quasiparticles.Polaritonics made tremendous steps forward in the 21st century thanks to the experimental observation of bosonic condensates and superfluids of exciton polaritons at elevated temperatures in a great variety of material systems.Coherent fluids of exciton polaritons can be efficiently controlled by laser light and/or by applied electric and magnetic fields.This opens ways to many applications,including but not limited to polariton lasing,optical switching,polariton simulators,neuromorphic computing,quantum computing,and polariton-induced superconductivity.Ghoch et al.provide a detailed analysis of the material systems suitable for room temperature polaritonics starting from wide-bandgap inorganic semiconductors such as GaN and ZnO,and carefully discuss also organic microcavities,perovskites,transition metal dichalcogenides,and hybrid structures.They discuss the advantages and disadvantages of these systems emphasizing recent experimental findings in each system.
