Affiliation:
1. School of Materials Science and Engineering Peking University Beijing 100871 China
2. CAS Key Laboratory of Standardization and Measurement for Nanotechnology National Center for Nanoscience and Technology Beijing 100190 China
3. State Key Laboratory of Low‐Dimensional Quantum Physics and Department of Physics Tsinghua University Beijing 100084 China
Abstract
AbstractContinuous‐wave (CW) pumped lasers with device areas below 1 µm2 constitute a key step to meeting the energy efficiency requirement for on‐chip optical communications. However, a debate about whether a sub‐micrometer device size and low threshold can be simultaneously satisfied has persisted owing to insurmountable radiation losses when approaching the optical diffraction limit. Herein, a record‐small CW optically pumped perovskite laser with a device area of 0.65 µm2 is demonstrated. The thresholds of sub‐micrometer lasers can be found lower than those of several‐micrometer counterparts, and are ascribed to the enlarged group refractive index and modal confinement resulting from the enhanced exciton–photon coupling. Moreover, the operation temperature is elevated to 150 K through the reduction in heat generation. These findings unveil the potential of exciton–polaritons in laser miniaturization, providing an alternative for developing low‐threshold semiconductor lasers without artificial optical cavities, to approach the optical diffraction limit.
Funder
Natural Science Foundation of Beijing Municipality
National Natural Science Foundation of China
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Cited by
8 articles.
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