Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/162390
Title: Active energy-efficient terahertz metasurfaces based on enhanced in-plane electric field density
Authors: Gupta, Manoj
Singh, Ranjan
Keywords: Science::Physics::Optics and light
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-. https://dx.doi.org/10.1002/adom.202200327
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.
URI: https://hdl.handle.net/10356/162390
ISSN: 2195-1071
DOI: 10.1002/adom.202200327
Schools: School of Physical and Mathematical Sciences 
Research Centres: Centre for Disruptive Photonic Technologies (CDPT) 
The Photonics Institute 
Rights: © 2022 Wiley-VCH GmbH. All rights reserved. This is the peer reviewed version of the following article: Gupta, M. & Singh, R. (2022). Active energy-efficient terahertz metasurfaces based on enhanced in-plane electric field density. Advanced Optical Materials, 10(15), 2200327-, which has been published in final form at https://doi.org/10.1002/adom.202200327. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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