Spontaneous emission in non-local materials

• 来源期刊: 光：科学与应用（英文版）
• 关键词: composite electromagnetic materials non-local optical properties plasmonic metamaterials quantum electrodynamics spontaneous emission
• 年，卷（期）: 2017,（2）
• 页码范围: 203-212
• 页数: 10页
• 语种: 英文
• DOI: 10.1038/lsa.2016.273

摘要

Light-matter interactions can be strongly modified by the surrounding environment.Here,we report on the first experimental observation of molecular spontaneous emission inside a highly non-local metamaterial based on a plasmonic nanomd assembly.We show that the emission process is dominated not only by the topology of its local effective medium dispersion,but also by the non-local response of the composite,so that metamaterials with different geometric parameters but the same local effective medium properties exhibit different Purcell factors.A record-high enhancement of a decay rate is observed,in agreement with the developed quantitative description of the Purcell effect in a non-local medium.An engineered material non-locality introduces an additional degree of freedom into quantum electmdynamics,enabling new applications in quantum information processing,photochemistry,imaging and sensing with macroscopic composites.