27 January 2017 Spectroscopy and mapping of resonant fields in terahertz plasmonic resonators
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Abstract
Plasmonic terahertz (THz) resonators provide a promising route for exploring strong light-matter coupling phenomena. Double-metal resonator designs in particular enable strong enhancement of the THz field and provide well-defined field orientation and confinement within a sub-wavelength size volume. The strong field confinement however limits access to the internal fields essential for investigations of light-matter coupling. We propose and investigate a method for mapping and spectroscopic analysis of the internal fields in double-metal plasmonic THz resonators. We use aperture-type scanning near-field THz microscopy to access strongly confined fields with sub-wavelength spatial resolution of ~5 μm (~λ/100). Combined with the THz time-domain spectroscopy technique, the near-field method allows us to perform spectroscopic studies and investigate the field evolution inside the resonator. This experimental method opens doors to studies of strong light-matter coupling at THz frequencies in individual plasmonic resonators.
Conference Presentation
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Oleg Mitrofanov, Oleg Mitrofanov, Zhanghua Han, Zhanghua Han, Fei Ding, Fei Ding, Sergey I. Bozhevolnyi, Sergey I. Bozhevolnyi, Igal Brener, Igal Brener, John L. Reno, John L. Reno, } "Spectroscopy and mapping of resonant fields in terahertz plasmonic resonators", Proc. SPIE 10111, Quantum Sensing and Nano Electronics and Photonics XIV, 101110R (27 January 2017); doi: 10.1117/12.2254416; https://doi.org/10.1117/12.2254416
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