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Materials 2018, 11(6), 941; https://doi.org/10.3390/ma11060941

Active Enhancement of Slow Light Based on Plasmon-Induced Transparency with Gain Materials

1
College of Liberal Arts and Sciences, National University of Defense Technology, Changsha 410073, China
2
Center of Material Science, National University of Defense Technology, Changsha 410073, China
*
Author to whom correspondence should be addressed.
Received: 8 May 2018 / Revised: 27 May 2018 / Accepted: 31 May 2018 / Published: 3 June 2018
(This article belongs to the Special Issue New Horizon of Plasmonics and Metamaterials)
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Abstract

As a plasmonic analogue of electromagnetically induced transparency (EIT), plasmon-induced transparency (PIT) has drawn more attention due to its potential of realizing on-chip sensing, slow light and nonlinear effect enhancement. However, the performance of a plasmonic system is always limited by the metal ohmic loss. Here, we numerically report a PIT system with gain materials based on plasmonic metal-insulator-metal waveguide. The corresponding phenomenon can be theoretically analyzed by coupled mode theory (CMT). After filling gain material into a disk cavity, the system intrinsic loss can be compensated by external pump beam, and the PIT can be greatly fueled to achieve a dramatic enhancement of slow light performance. Finally, a double-channel enhanced slow light is introduced by adding a second gain disk cavity. This work paves way for a potential new high-performance slow light device, which can have significant applications for high-compact plasmonic circuits and optical communication. View Full-Text
Keywords: plasmon-induced transparency; metal-dielectric-metal; gain material plasmon-induced transparency; metal-dielectric-metal; gain material
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Zhang, Z.; Yang, J.; He, X.; Han, Y.; Zhang, J.; Huang, J.; Chen, D.; Xu, S. Active Enhancement of Slow Light Based on Plasmon-Induced Transparency with Gain Materials. Materials 2018, 11, 941.

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