当前位置: X-MOL 学术Appl. Phys. Lett. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Nanospectroscopy of a single patch antenna strongly coupled to a mid-infrared intersubband transition in a quantum well
Applied Physics Letters ( IF 4 ) Pub Date : 2020-09-08 , DOI: 10.1063/5.0018865
Raymond Gillibert 1 , Mario Malerba 2 , Davide Spirito 3 , Valeria Giliberti 4 , Lianhe Li 5 , A. Giles Davies 5 , Edmund H. Linfield 5 , Leonetta Baldassarre 1, 3 , Raffaele Colombelli 2 , Michele Ortolani 1, 4
Affiliation  

Scanning-probe-assisted mid-infrared nano-spectroscopy is employed to reveal the polaritonic dispersion of individual MIM (metal-insulator-metal) square patch antennas whose modes can be strongly coupled to a mid-infrared intersubband transition. The patch antenna side length L sets the resonances between λ = 5.5 μm and 12.5 μm. The active region consists of a highly doped AlInAs/InGaAs/AlInAs single quantum well that presents an intersubband transition at 1190 cm−1 (λ = 8.4 μm). When the patch antenna optical resonance approaches and matches the intersubband transition frequency (L ∼ 1.8 μm), a clear anticrossing behavior—evidence of strong coupling—is observed in the near-field scattering phase spectra of individual antennas. The measured Rabi splitting is 4.5 THz. The near-field scattering spectra agree with the far-field extinction spectra acquired on arrays of identical antennas.

中文翻译:

单个贴片天线的纳米光谱与量子阱中的中红外子带间跃迁强耦合

扫描探针辅助中红外纳米光谱用于揭示单个 MIM(金属-绝缘体-金属)方形贴片天线的极化色散,其模式可以与中红外子带间过渡强耦合。贴片天线边长 L 将谐振设置在 λ = 5.5 μm 和 12.5 μm 之间。有源区由高度掺杂的 AlInAs/InGaAs/AlInAs 单量子阱组成,在 1190 cm-1 (λ = 8.4 μm) 处呈现子带间跃迁。当贴片天线光学谐振接近并匹配子带间过渡频率(L ∼ 1.8 μm)时,在单个天线的近场散射相位谱中观察到明显的反交叉行为——强耦合的证据。测得的 Rabi 分裂为 4.5 THz。
更新日期:2020-09-08
down
wechat
bug