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Title: Formation and ultraslow propagation of infrared solitons in graphene under an external magnetic field

Unusual dispersion relation of graphene nanoribbons for electrons can lead to an exceptionally strong optical response in the infrared regime and exhibits a very good tunable frequency. According to quantum optics and solid-material scientific principles, here we show the possibility to generate ultraslow infrared bright and dark solitons in graphene under the action of strong magnetic and infrared laser fields. By means of quantum-mechanical density-matrix formalism, we derive the equations of motion that govern the nonlinear evolution of the probe-pulse envelope in this scheme. It is found that, by properly choosing the parameters of the system, the formation and ultraslow propagation of infrared spatial solitons originate from the balance between nonlinear effects and the dispersion properties of the graphene under infrared excitation. Moreover, the unique electronic properties and selection rules near the Dirac point provide more freedom for us to study the linear and nonlinear dynamical responses of the photonics and graphene system. These results may have potential applications in telecommunication and optical information processing.
Authors:
 [1] ; ;  [2] ;  [3] ;  [4] ;  [3]
  1. School of Physics and Electronics, Henan University, Kaifeng 475004 (China)
  2. School of Science, Hubei Province Key Laboratory of Intelligent Robot, Wuhan Institute of Technology, Wuhan 430073 (China)
  3. Wuhan National Laboratory for Optoelectronics and School of Physics, Huazhong University of Science and Technology, Wuhan 430074 (China)
  4. (China)
Publication Date:
OSTI Identifier:
22304021
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 23; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; DENSITY MATRIX; DISPERSION RELATIONS; DISPERSIONS; ELECTRONS; EQUATIONS OF MOTION; EXCITATION; GRAPHENE; LASER RADIATION; MAGNETIC FIELDS; NANOSTRUCTURES; PULSES; QUANTUM MECHANICS; SELECTION RULES; SOLIDS; SOLITONS; WAVE PROPAGATION