Few-Electron Ultrastrong Light-Matter Coupling at 300 GHz with Nanogap Hybrid LC Microcavities
Few-Electron Ultrastrong Light-Matter Coupling at 300 GHz with Nanogap Hybrid LC Microcavities
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DOI：
10.1021/acs.nanolett.7b03228
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发表时间：
2017-12-01
期刊：
影响因子：
10.8
通讯作者：
Faist, Jerome
中科院分区：
文献类型：
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作者：
Keller, Janine;Scalari, Giacomo;Faist, Jerome
超强光-物质耦合可以通过强真空场与巨大电子偶极子的相互作用来探索物质的新状态。通过使用基于混合偶极天线的分裂环谐振腔，其有效模体积极小，V-eff/lambda(3)(0)相似或等于6 X 10(-10)，表面S-eff/lambda(2)(0)相似或等于3.5 X 10(-7)，我们探测了300 GHz下位于高迁移率二维电子气体最后占据朗道能级的100个以下电子的超强光物质耦合，测量了归一化耦合比Omega(R)/ Omega(c) = 0.36。由于光-物质耦合系统的有效质量比不耦合系统的有效质量更重，因此观察到极大减小的空腔尺寸的影响。这些结果为二维电子系统中单电子水平的超强耦合开辟了道路。
Ultrastrong light-matter coupling allows the exploration of new states of matter through the interaction of strong vacuum fields with huge electronic dipoles. By using hybrid dipole antenna-split ring resonator-based cavities with extremely small effective mode volumes V-eff/lambda(3)(0) similar or equal to 6 X 10(-10) and surfaces S-eff/lambda(2)(0) similar or equal to 3.5 X 10(-7), we probe the ultrastrong light-matter coupling at 300 GHz to less than 100 electrons located in the last occupied Landau level of a high mobility two-dimensional electron gas, measuring a normalized coupling ratio of Omega(R)/omega(c) = 0.36. Effects of the extremely reduced cavity dimensions are observed as the light-matter coupled system is better described by an effective mass heavier than the uncoupled one. These results open the way to ultrastrong coupling at the single-electron level in two-dimensional electron systems.