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5 March 2021 Variable metallic nanogaps for electromagnetic control in quantum regime
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Abstract
Plasmonic gap governs much of the electromagnetic response of metamaterials. Meanwhile, nano and subnanometric gap control achieved by exceptional advancement of nanotechnology has paved the way for quantum plasmonics. However, practical applications have been hindered by difficulties of active nano-control over a broad spectral range. We report on mechanically nano-controllable plasmonic metamaterials fabricated on flexible substrate with a broad spectral response from the visible to the terahertz waves. By closing and opening the metallic nanogap via macroscopic control, we observed both classical and quantum plasmonic responses. Using our devices functioning between the two extreme regimes of classical gaps and full-contact mode, we achieve unprecedented performances of light modulation in a broad spectral range.
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© (2021) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Dasom Kim, Hyeong Seok Yun, Bamadev Das, Dukhyung Lee, Jiyeah Rhie, Parinda Vasa, Young-Mi Bahk, and Dai-Sik Kim "Variable metallic nanogaps for electromagnetic control in quantum regime", Proc. SPIE 11684, Ultrafast Phenomena and Nanophotonics XXV, 1168417 (5 March 2021); https://doi.org/10.1117/12.2577940
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