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Title: Lattice induced strong coupling and line narrowing of split resonances in metamaterials
Authors: Tan, Thomas CaiWei
Srivastava, Yogesh Kumar
Manjappa, Manukumara
Plum, Eric
Singh, Ranjan
Keywords: Plasmonics
Terahertz Spectroscopy
Issue Date: 2018
Source: Tan, T. C., Srivastava, Y. K., Manjappa, M., Plum, E., & Singh, R. (2018). Lattice induced strong coupling and line narrowing of split resonances in metamaterials. Applied Physics Letters, 112(20), 201111-. doi:10.1063/1.5026649
Series/Report no.: Applied Physics Letters
Abstract: Strongly coupled metamaterial resonances typically undergo mode-splitting by which there is an exchange of energy between matter excitations and photons. Here, we report a strong coupling of the lattice mode with the structural eigen-resonances of an asymmetric split-ring metamaterial associated with mode-splitting and resonance line-narrowing that gives rise to high quality factor (Q-factor) resonances. We demonstrate selective control of the resonance strength, line-width, and Q-factor of individual split-ring modes by tailoring the coupling of the fundamental lattice mode to each of the hybridized resonances. A three-coupled-oscillator model shows lattice-mediated strong coupling in the form of an anti-crossing behavior between the hybridized metamaterial resonances. Such schemes of strong coupling between the lattice and the hybrid modes of the metamaterial unit cell offer an avenue to invoke lattice induced transparency, high-Q resonances and strong field confinement, which could find applications in designing slow light devices, ultrasensitive sensors, and multiband narrow filters.
ISSN: 0003-6951
DOI: 10.1063/1.5026649
DOI (Related Dataset):
Schools: School of Physical and Mathematical Sciences 
Research Centres: Centre for Disruptive Photonic Technologies (CDPT) 
Rights: © 2018 The Author(s). All rights reserved. This paper was published by AIP in Applied Physics Letters and is made available with permission of The Author(s).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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