期刊
NATURE PHYSICS
卷 14, 期 7, 页码 739-+出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41567-018-0109-9
关键词
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资金
- Academy of Finland through its Centres of Excellence Programme
- Academy of Finland [284621, 303351, 307419]
- European Research Council [ERC-2013-AdG-340748-CODE]
- COST (European Cooperation in Science and Technology)
- Marie Sklodowska-Curie Action [745115]
- Aalto University
- Marie Curie Actions (MSCA) [745115] Funding Source: Marie Curie Actions (MSCA)
Bose-Einstein condensation is a remarkable manifestation of quantum statistics and macroscopic quantum coherence. Superconductivity and superfluidity have their origin in Bose-Einstein condensation. Ultracold quantum gases have provided condensates close to the original ideas of Bose and Einstein, while condensation of polaritons and magnons has introduced novel concepts of non-equilibrium condensation. Here, we demonstrate a Bose-Einstein condensate of surface plasmon polaritons in lattice modes of a metal nanoparticle array. Interaction of the nanoscale-confined surface plasmons with a room-temperature bath of dye molecules enables thermalization and condensation in picoseconds. The ultrafast thermalization and condensation dynamics are revealed by an experiment that exploits thermalization under propagation and the open-cavity character of the system. A crossover from a Bose-Einstein condensate to usual lasing is realized by tailoring the band structure. This new condensate of surface plasmon lattice excitations has promise for future technologies due to its ultrafast, room-temperature and on-chip nature.
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