Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/141634
Title: All‐dielectric active terahertz photonics driven by bound states in the continuum
Authors: Han, Song
Cong, Longqing
Srivastava, Yogesh Kumar
Qiang, Bo
Rybin, Mikhail V.
Kumar, Abhishek
Jain, Ravikumar
Lim, Wen Xiang
Achanta, Venu Gopal
Prabhu, Shriganesh S.
Wang, Qijie
Kivshar, Yuri S.
Singh, Ranjan
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2019
Source: Han, S., Cong, L., Srivastava, Y. K., Qiang, B., Rybin, M. V., Kumar, A., . . . Singh, R. (2019). All‐dielectric active terahertz photonics driven by bound states in the continuum. Advanced Materials, 31(37), 1901921-. doi:10.1002/adma.201901921
Journal: Advanced materials 
Abstract: The remarkable emergence of all‐dielectric meta‐photonics governed by the physics of high‐index dielectric materials offers a low‐loss platform for efficient manipulation and subwavelength control of electromagnetic waves from microwaves to visible frequencies. Dielectric metasurfaces can focus electromagnetic waves, generate structured beams and vortices, enhance local fields for advanced sensing, and provide novel functionalities for classical and quantum technologies. Recent advances in meta‐photonics are associated with the exploration of exotic electromagnetic modes called the bound states in the continuum (BICs), which offer a simple interference mechanism to achieve large quality factors (Q) through excitation of supercavity modes in dielectric nanostructures and resonant metasurfaces. Here, a BIC‐driven terahertz metasurface with dynamic control of high‐Q silicon supercavities that are reconfigurable at a nanosecond timescale is experimentally demonstrated. It is revealed that such supercavities enable low‐power, optically induced terahertz switching and modulation of sharp resonances for potential applications in lasing, mode multiplexing, and biosensing.
URI: https://hdl.handle.net/10356/141634
ISSN: 0935-9648
DOI: 10.1002/adma.201901921
Schools: School of Electrical and Electronic Engineering 
School of Physical and Mathematical Sciences 
Organisations: Centre for Disruptive Photonic Technologies
The Photonics Institute
Centre for OptoElectronics and Biophotonics
Rights: This is the peer reviewed version of the following article: Han, S., Cong, L., Srivastava, Y. K., Qiang, B., Rybin, M. V., Kumar, A., . . . Singh, R. (2019). All‐dielectric active terahertz photonics driven by bound states in the continuum. Advanced Materials, 31(37), 1901921-. doi:10.1002/adma.201901921, which has been published in final form at https://doi.org/10.1002/adma.201901921. 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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