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Title: Phase control of light propagation via Fano interference in asymmetric double quantum wells

We investigate the light propagation and dynamical control of a weak pulsed probe field in asymmetric double quantum wells via Fano interference, which is caused by tunneling from the excited subbands to the same continuum. Our results show that the system can produce anomalous and normal dispersion regions with negligible absorption by choosing appropriate coupling strength of the tunneling and the Fano interference. Interesting enough, the dispersion can be switched between normal and anomalous by adjusting the relative phase between the pulsed probe and coherent control fields owing to the existence of the perfectly Fano interference. Thus, the relative phase can be regarded as a switch to manipulate light propagation with subluminal or superluminal. The temporal and spatial dynamics of the pulsed probe field with hyperbolic secant envelope are analyzed.
Authors:
 [1] ;  [2] ; ; ;  [1] ;  [3]
  1. Department of Physics, Southeast University, Nanjing 210096 (China)
  2. (China)
  3. Institute of Photonics Technologies, National Tsing-Hua University, Hsinchu 300, Taiwan (China)
Publication Date:
OSTI Identifier:
22304347
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 20; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION; ASYMMETRY; COUPLING; DISPERSIONS; FANO FACTOR; INTERFERENCE; LIGHT TRANSMISSION; PULSES; QUANTUM WELLS; SWITCHES; TUNNEL EFFECT