Terahertz aperture SNOM mapping of metamaterial coupled resonators

Almond, N.W. and Hermans, R. and Hale, L.L. and Kindness, S.J. and Michailow, W. and Wei, B. and Romain, X. and Ye, S. and Young, R. and Degl'Innocenti, R. and Beere, H.E. and Ritchie, D.A. and Mitrofanov, O. and N., Engheta and (SPIE), The Society of Photo-Optical Instrumentation Engineers (2020) Terahertz aperture SNOM mapping of metamaterial coupled resonators. In: Metamaterials, Metadevices, and Metasystems 2020, 2020-08-202020-08-20, Online.

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Metamaterials have emerged as the basis of a novel optoelectronic platform operating in the terahertz (THz) range, due to their versatility and strong light-matter interaction. The necessary design of efficient modulators and detectors requires a detailed investigation of metamaterial resonances and their interplay with an active medium, e.g. graphene. An aperture-SNOM (a-SNOM) system based on picosecond THz pulses was used to investigate the spectral characteristics of a set of lithographically tuned metamaterial coupled resonators. This approach allowed the mapping of the supported E-field of each resonator a few microns from the device plane, yielding bonding and antibonding modes reminiscent of electromagnetic induced transparency. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

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Metamaterials, Metadevices, and Metasystems 2020
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Conference code: 162897 Export Date: 14 October 2020 CODEN: PSISD Correspondence Address: Almond, N.W.; Cavendish Laboratory,University of Cambridge, J J Thomson Avenue, United Kingdom; email: na470@cam.ac.uk Funding details: Engineering and Physical Sciences Research Council, EPSRC, EP/S019383/1, EP/P021859/1 Funding text 1: The authors acknowledge EPSRC funding within the Hyperterahertz grant, number EP/P021859/1, Jonathan P. Griffiths and Thomas A. Mitchell for help with electron beam lithography. R.D. acknowledges support from the EPSRC (Grant No EP/S019383/1). References: Li, Y., Tantiwanichapan, K., Swan, A.K., Paiella, R., Graphene plasmonic devices for terahertz optoelectronics (2020) Nanophotonics, 9 (7), pp. 1901-1920; Low, T., Avouris, P., Graphene plasmonics for terahertz to mid-infrared applications (2014) Acs Nano, 8 (2), pp. 1086-1101. , PMID: 24484181; Shi, J., Li, Z., Sang, D.K., Xiang, Y., Li, J., Zhang, S., Zhang, H., Thz photonics in two dimensional materials and metamaterials: Properties, devices and prospects (2018) J. Mater. Chem. C, 6, pp. 1291-1306; Dhillon, S.S., Vitiello, M.S., Linfield, E.H., Davies, A.G., Hoffmann, M.C., Booske, J., Paoloni, C., Johnston, M.B., The 2017 terahertz science and technology roadmap (2017) Journal of Physics D: Applied Physics, 50, p. 043001. , Jan; Degl'Innocenti, R., Wallis, R., Wei, B., Xiao, L., Kindness, S.J., Mitrofanov, O., Braeuninger-Weimer, P., Ritchie, D.A., Terahertz nanoscopy of plasmonic resonances with a quantum cascade laser (2017) Acs Photonics, 4 (9), pp. 2150-2157; Mitrofanov, O., Lee, M., Hsu, J.W.P., Brener, I., Harel, R., Federici, J.F., Wynn, J.D., West, K.W., Collection-mode near-field imaging with 0.5-thz pulses (2001) Ieee Journal of Selected Topics in Quantum Electronics, 7 (4), pp. 600-607; Hale, L.L., Keller, J., Siday, T., Hermans, R.I., Haase, J., Reno, J.L., Brener, I., Mitrofanov, O., Noninvasive near-field spectroscopy of single subwavelength complementary resonators (2020) Laser & Photonics Reviews, 14 (4), p. 1900254; Chen, C.-Y., Un, I.-W., Tai, N.-H., Yen, T.-J., Asymmetric coupling between subradiant and superradiant plasmonic resonances and its enhanced sensing performance Opt. Express, 17, pp. 15372-15380. , http://www.opticsexpress.org/abstract.cfm?URI=oe-17-17-15372; Kindness, S.J., Almond, N.W., Wei, B., Wallis, R., Michailow, W., Kamboj, V.S., Braeuninger-Weimer, P., Degl'Innocenti, R., Active control of electromagnetically induced transparency in a terahertz metamaterial array with graphene for continuous resonance frequency tuning (2018) Advanced Optical Materials, 6 (21), p. 1800570
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23 Jun 2021 16:15
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17 Sep 2023 04:22