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Bound states in the continuum driven by AC fields

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Gonzalez-Santander, C and Orellana, P. A. and Domínguez-Adame Acosta, Francisco (2013) Bound states in the continuum driven by AC fields. EPL, 102 (1). ISSN 0295-5075

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Official URL: http://dx.doi.org/10.1209/0295-5075/102/17012


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http://iopscience.iop.orgPublisher


Abstract

We report on the formation of bound states in the continuum driven by AC fields. The considered system consists of a quantum ring connected to two leads. An AC side-gate voltage controls the interference of electrons passing through the system. We model the system by two sites in parallel connected to two semi-infinite lattices. The energy of these sites changes harmonically with time. We obtain the transmission probability and the local density of states at the ring sites and show that transmission probability displays a Fano profile when the energy of the incoming electron approaches the driving frequency. Correspondingly, the local density of states presents a narrow peak that approaches a delta-function in the weak-coupling limit. We attribute these features to the presence of bound states in the continuum.


Item Type:Article
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© EPLA, 2013.
The authors thank A. V. MALYSHEV for a critical reading of the manuscript Work at Madrid was supported by MICINN (project MAT2010-17180). CG-S acknowledges financial support from Comunidad de Madrid and European Social Foundation. PAO acknowledges financial support from FONDECYT under grant 1100560.

Uncontrolled Keywords:Transmission, Resonances, Rings
Subjects:Sciences > Physics > Materials
ID Code:27205
Deposited On:12 Nov 2014 10:35
Last Modified:16 Jun 2015 16:17

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