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Title: Enhanced tunability of plasmon induced transparency in graphene strips

The approach of slow-light efficiency manipulation is theoretically investigated in graphene analogue of electromagnetically induced transparency (EIT) system, which cannot be realized in conventional quantum regime. In this system, two graphene strips with different Fermi energies placed side by side as radiative elements have been discussed, and the coupling strength between radiative elements and dark elements is tuned by these radiative elements. Our proposed scheme exploits the tuning of coupling strength between the radiative elements and dark elements in contrast with the existing approaches that rely on tuning the damping rates of radiative or dark elements. The transparent window and group delays can be tuned by different coupling strength without changing the geometry of structure. This manipulation can be explained using a temporal coupled-mode theory. Furthermore, the hybridized states in this EIT-like system can be manipulated by tuning the Fermi energy of radiative elements. This kind of controllable electromagnetically induced transparency has many significant potential applications in optoelectronic, photodetectors, tunable sensors, and storage of optical data regimes.
Authors:
 [1] ;  [2] ; ;  [3]
  1. Department of Physics, Fudan University, Shanghai 200433 (China)
  2. (China)
  3. School of Physics Science and Engineering, Tongji University, Shanghai 200092 (China)
Publication Date:
OSTI Identifier:
22402834
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 14; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COUPLING; DAMPING; EFFICIENCY; FERMI LEVEL; GRAPHENE; OPACITY; PHOTODETECTORS; PLASMONS; QUANTUM MECHANICS; SENSORS; TUNING; VISIBLE RADIATION