An All-dielectric Metasurface Supporting Trapped Mode as a Platform for Sensory Applications

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Vol. 225, Issue 9, September 2018, pp. 8-13

An All-dielectric Metasurface Supporting Trapped Mode as a Platform for Sensory Applications

^1, ² Anton S. KUPRIIANOV, ^1, ^3, ^* Su XU, ^1, ^2, ^* Wei HAN, ^4, ⁵ Vyacheslav V. KHARDIKOV and ^1, ^3, ^4, ^* Vladimir R. TUZ

¹ International Center of Future Science, Jilin University, 2699 Qianjin Str., Changchun 130012, China
² College of Physics, Jilin University, 2699 Qianjin Str., Changchun 130012, China
³ State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Str., Changchun 130012, China
⁴ Institute of Radio Astronomy of NASU, 4, Mystetstv Str., Kharkiv 61002, Ukraine
⁵ School of Radio Physics, V. N. Karazin Kharkiv National University, 4, Svobody Sq., Kharkiv 61022, Ukraine

^* E-mail: xusu@jlu.edu.cn, whan@jlu.edu.cn, tvr@jlu.edu.cn

Received: 25 June 2018 /Accepted: 31 August 2018 /Published: 30 September 2018

Abstract: The development of the theory of metasurfaces has shown great potential for their use in sensory applications. However, in infrared and visible parts of spectrum the metallic-inclusion-based metasurfaces often face the application obstacles associated with Ohmic losses in metals and fabrication difficulties. Possible solution is to use all-dielectric structures instead of metallic ones. In this study, an all-dielectric resonant metasurface is investigated as a platform for sensory applications in the infrared range. The metasurface is made of an array with unit cell in the form of a single subwavelength dielectric disk having a round eccentric penetrating hole. Resonant states in the transmitted spectra of the metasurface are identified from the comparison with modes inherent in the individual cylindrical dielectric resonators. Correlation between an asymmetry in the geometry of unit cell and formation of the high-quality- factor trapped mode is established. In order to demonstrate the ability of the designed metasurface to serve as a sensor platform, an experimental characterization of the trapped mode is performed in the microwave frequency range.

Keywords: Sensor platforms, Photonic structures, Metasurfaces, Metamaterials, Microwave characterization.

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