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Title: Resonant electronic transport through a triple quantum-dot with Λ-type level structure under dual radiation fields

Due to quantum interference, light can transmit through dense atomic media, a phenomenon known as electromagnetically induced transparency (EIT). We propose that EIT is not limited to light transmission and there is an electronic analog where resonant transparency in charge transport in an opaque structure can be induced by electromagnetic radiation. A triple-quantum-dots system with Λ-type level structure is generally opaque due to the level in the center dot being significantly higher and therefore hopping from the left dot to the center dot is almost forbidden. We demonstrate that an electromagnetically induced electron transparency (EIET) in charge of transport can indeed occur in the Λ-type system. The direct evidence of EIET is that an electron can travel from the left dot to the right dot, while the center dot apparently becomes invisible. We analyze EIET and the related shot noise in both the zero and strong Coulomb blockade regimes. It is found that the EIET (position, height, and symmetry) can be tuned by several controllable parameters of the radiation fields, such as the Rabi frequencies and detuning frequencies. The result offers a transparency/opaque tuning technique in charge transport using interfering radiation fields.
Authors:
;  [1] ;  [2] ;  [3] ;  [3] ;  [1] ;  [3]
  1. School of Physics, Peking University, Beijing 100871 (China)
  2. School of Physics, University of Wollongong, Wollongong, New South Wales 2522 (Australia)
  3. (China)
Publication Date:
OSTI Identifier:
22314598
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 6; Other Information: (c) 2014 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; CHARGE TRANSPORT; HEIGHT; INTERFERENCE; LIGHT TRANSMISSION; NOISE; OPACITY; QUANTUM DOTS; SYMMETRY; TUNING; VISIBLE RADIATION