Time delay of wave packets during their tunnelling through a quantum diode

A modified saddle-point method is used to investigate the process of propagation of a wave packet through a quantum diode. A scattering matrix is constructed for the structure in question. The case of tunnelling of a packet with a Gaussian envelope through the diode is considered in detail. The time...

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Bibliographic Details
Published in:Quantum electronics (Woodbury, N.Y.) N.Y.), 2014-01, Vol.44 (4), p.387-391
Main Authors: Ivanov, N.A., Skalozub, V.V.
Format: Article
Language:English
Subjects:
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Delay
delay time of a wave packet
Diodes
Gaussian
LASERS
Mathematical analysis
quantum diode
QUANTUM ELECTRONICS
SADDLE-POINT METHOD
SCATTERING
TIME DELAY
TUNNEL DIODES
TUNNEL EFFECT
Tunnelling
WAVE PACKETS
Wave propagation
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Summary:A modified saddle-point method is used to investigate the process of propagation of a wave packet through a quantum diode. A scattering matrix is constructed for the structure in question. The case of tunnelling of a packet with a Gaussian envelope through the diode is considered in detail. The time delay and the shape of the wave packet transmitted are calculated. The dependence of the delay time on the characteristics of the input packet and the internal characteristics of the quantum diode is studied. Possible applications of the results obtained are discussed.
ISSN:1063-7818
1468-4799
DOI:10.1070/QE2014v044n04ABEH015315