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- Title
Resonant inelastic tunneling using multiple metallic quantum wells.
- Authors
Zhang, Yiyun; Lepage, Dominic; Feng, Yiming; Zhao, Sihan; Chen, Hongsheng; Qian, Haoliang
- Abstract
Tunnel nanojunctions based on inelastic electron tunneling (IET) have been heralded as a breakthrough for ultra-fast integrated light sources. However, the majority of electrons tend to tunnel through a junction elastically, resulting in weak photon-emission power and limited efficiency, which have hindered their practical applications to date. Resonant tunneling has been proposed as a way to alleviate this limitation, but photon-emissions under resonant tunneling conditions have remained unsatisfactory for practical IET-based light sources due to the inherent contradiction between high photon-emission efficiency and power. In this work, we introduce a novel approach that leverages much stronger resonant tunneling enhancement achieved by multiple metallic quantum wells, which has enabled the internal quantum efficiency to reach ∼1 and photon-emission power to reach ∼0.8 µW/µm2. Furthermore, this method is applicable with different electronic lifetimes ranging from 10 fs to 100 fs simultaneously, bringing practical implementation of IET-based sources one step closer to reality.
- Subjects
QUANTUM wells; QUANTUM efficiency; RESONANT tunneling; LIGHT sources; ELECTRON tunneling; X-ray scattering
- Publication
Nanophotonics (21928606), 2023, Vol 12, Issue 16, p3313
- ISSN
2192-8606
- Publication type
Article
- DOI
10.1515/nanoph-2023-0231