Tailoring the slow light behavior in terahertz metasurfaces

We experimentally study the effect of near field coupling on the transmission of light in terahertz metasurfaces. Our results show that tailoring the coupling between the resonators modulates the amplitude of resulting electromagnetically induced transmission, probed under different types of asymmet...

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Bibliographic Details
Published in:Applied physics letters 2015-05, Vol.106 (18)
Main Authors: Manjappa, Manukumara, Chiam, Sher-Yi, Cong, Longqing, Bettiol, Andrew A., Zhang, Weili, Singh, Ranjan
Format: Article
Language:English
Subjects:
AMPLITUDES
Applied physics
ASYMMETRY
Attenuators
Broadband
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
COUPLING
ELECTROMAGNETIC FILTERS
ELECTROMAGNETISM
FILTERS
INTERFERENCE
LIGHT TRANSMISSION
METAMATERIALS
Metasurfaces
OPACITY
PROBES
RESONATORS
Terahertz frequencies
THZ RANGE
VISIBLE RADIATION
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Summary:We experimentally study the effect of near field coupling on the transmission of light in terahertz metasurfaces. Our results show that tailoring the coupling between the resonators modulates the amplitude of resulting electromagnetically induced transmission, probed under different types of asymmetries in the coupled system. Observed change in the transmission amplitude is attributed to the change in the amount of destructive interference between the resonators in the vicinity of strong near field coupling. We employ a two-particle model to theoretically study the influence of the coupling between bright and quasi-dark modes on the transmission properties of the system and we find an excellent agreement with our observed results. Adding to the enhanced transmission characteristics, our results provide a deeper insight into the metamaterial analogues of atomic electromagnetically induced transparency and offer an approach to engineer slow light devices, broadband filters, and attenuators at terahertz frequencies.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4919531