Continuous-wave perovskite polariton laser device and a laser chip

A continuous-wave perovskite polariton laser device, comprising an optical microcavity, a spacer layer, and a gain medium, wherein the continuous-wave perovskite polariton laser device is prepared by the following steps:

• S1, preparing the optical microcavity;
• wherein, S1 comprises the following steps:
• depositing a metal pillar array on a distributed bragg reflector (DBR) mirror, with a height of each metal pillar ranging from 10 nm to 1 mm;
• placing another DBR mirror facing down and bonded to the DBR mirror with the metal pillar array;
• applying a pressure to press them together to form a vertical microcavity surface-emitting laser (VCSEL) structure;
• and
• S2, preparing the perovskite material;
• wherein, S2 comprises the following steps:
• dissolving A′X, AX, BX2, and a molecular additive selected from polymethyl methacrylate (PMMA), polyethylene glycol (PEG), poly (ethylene oxide) (PEO), or polyvinylpyrrolidone (PVP);
• the small molecule is potassium bromide (KBr), potassium thiocyanate (KSCN), or guanidine thiocyanate (GASCN);
• and the oxide is NiOx, ZnO, and SnO2 in a solvent to obtain a perovskite precursor solution;
• and
• preparing the perovskite material by solution process;
• wherein A′ is organic amine ion, A is monovalent cation, B is divalent metal cation, and X is anion;
• and
• S3, preparing the perovskite laser device;
• wherein, S3 comprises the following steps:
• injecting the perovskite precursor solution into the optical microcavity;
• placing the optical microcavity with the perovskite precursor solution on a heating platform to induce a crystallization of a perovskite single crystal during a heating process, allowing in-situ growth of the perovskite single crystal, and obtaining the continuous-wave perovskite polariton laser device;
• wherein the continuous-wave perovskite polariton laser device is operated in continuous-wave pumping mode, and a working principle is polariton condensation emission, a lasing threshold is 0.4 W cm−2;
• the gain medium is the perovskite material, which is uniformly distributed within the microcavity.