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Title: Active energy-efficient terahertz metasurfaces based on enhanced in-plane electric field density
Authors: Gupta, Manoj
Singh, Ranjan
Keywords: Science::Physics
Issue Date: 2022
Source: Gupta, M. & Singh, R. (2022). Active energy-efficient terahertz metasurfaces based on enhanced in-plane electric field density. Advanced Optical Materials, 10(15), 2200327-.
Project: A18A5b0056
Journal: Advanced Optical Materials
Abstract: Subwavelength confinement of electromagnetic modes in periodic structures is essential to tailor light−matter interaction in space and time. Metamaterials with strong electromagnetic field confinement can be extremely sensitive to surface conditions, thereby enhancing the metadevice response for low-energy electrical, thermal, and optical stimuli. It is important to note that the total field confinement matters, but the contribution of in-plane electric field density is critical to efficiently harness and manipulate light via active metasurfaces. The authors experimentally demonstrate a new planar metal–semiconductor hybrid terahertz (THz) metasurface design that shows highly sensitive active THz amplitude modulation towards optical illumination. In the proposed design, in-plane electric field density has been enhanced by 350% to lower the optical pump fluence requirement for energy-efficient, active modulation of resonances compared to the conventional inductive-capacitive resonant metamaterials. Such metasurfaces with large in-plane electric field density can find many applications in developing ultrasensitive sensors and active THz electrical and optical modulators operational at extremely low energies.
ISSN: 2195-1071
DOI: 10.1002/adom.202200327
Rights: © 2022 Wiley-VCH GmbH. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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