“Reverse Fabrication” Technique to Develop Mechanically Tunable THz Metasurfaces using a Flexible Polydimethylsiloxane Substrate

Ambhire, S. C.; Palkhivala, Shalom; Agrawal, Amit; Gupta, Abhishek; Rana, Goutam; Mehta, R. V.; Bhattacharya, Arkabrata; Venugopal, Archana; Prabhu, S. S.

doi:10.1109/irmmw-thz.2018.8509856

Cited by 2 publications

(1 citation statement)

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“…With recent efforts toward multifunctional metasurfaces, several pioneering works have also addressed the inherent drawbacks of conventional metasurfaces, including monochromatic aberrations [2,7,12], fixed wave response, and narrow operation bandwidth [13,14]. The improvement in efficiency and functionality can be traced to a better understanding of meta-atoms design, material composition, and the integration of hybrid materials [15].…”

Section: Introductionmentioning

confidence: 99%

Tunable Metasurfaces Based on Mechanically Deformable Polymeric Substrates

et al. 2023

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The emergence of metamaterials has presented an unprecedented platform to control the fundamental properties of light at the nanoscale. Conventional metamaterials, however, possess passive properties that cannot be modulated post-fabrication, limiting their application spectrum. Recent metasurface research has explored a plethora of active control mechanisms to modulate the optical properties of metasurfaces post-fabrication. A key active control mechanism of optical properties involves the use of mechanical deformation, aided by deformable polymeric substrates. The use of deformable polymeric substrates enables dynamic tuning of the optical properties of metasurfaces including metalenses, metaholograms, resonance, and structural colors, which are collectively relevant for biosensing and bioimaging. Deformable–stretchable metasurfaces further enable conformable and flexible optics for wearable applications. To extend deformable–stretchable metasurfaces to biocompatible metasurfaces, a fundamental and comprehensive primer is required. This review covers the underlying principles that govern the highlighted representative metasurface applications, encompassing stretchable metalenses, stretchable metaholograms, tunable structural colors, and tunable plasmonic resonances, while highlighting potential advancements for sensing, imaging, and wearable biomedical applications.

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