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Journal Article
Bias field tailored plasmonic nano-electrode for high-power terahertz photonic devices
- Authors
- Kiwon Moon, Il-Min Lee, Jun-Hwan Shin, Eui Su Lee, Namje Kim, Won-Hui Lee, Hyunsung Ko, Sang-Pil Han, Kyung Hyun Park
- Issue Date
- 2015-09
- Citation
- Scientific Reports, v.5, pp.1-9
- ISSN
- 2045-2322
- Publisher
- Nature Publishing Group
- Language
- English
- Type
- Journal Article
- Abstract
- Photoconductive antennas with nano-structured electrodes and which show significantly improved performances have been proposed to satisfy the demand for compact and efficient terahertz (THz) sources. Plasmonic field enhancement was previously considered the dominant mechanism accounting for the improvements in the underlying physics. However, we discovered that the role of plasmonic field enhancement is limited and near-field distribution of bias field should be considered as well. In this paper, we clearly show that the locally enhanced bias field due to the size effect is much more important than the plasmonic enhanced absorption in the nano-structured electrodes for the THz emitters. Consequently, an improved nano-electrode design is presented by tailoring bias field distribution and plasmonic enhancement. Our findings will pave the way for new perspectives in the design and analysis of plasmonic nano-structures for more efficient THz photonic devices.
- KSP Keywords
- Bias Field, Dominant mechanism, Electrode Design, Enhanced absorption, Field enhancement, High power, Nano-electrodes, Nano-structured, Plasmonic enhanced, design and analysis, near-field distribution
This work is distributed under the term of Creative Commons License (CCL)
(CC BY)
(CC BY)
