Eur. Phys. J. B (2013) 86: 27
https://doi.org/10.1140/epjb/e2012-30988-9

Regular Article

Resonant transport and giant persistent currents in double-asymmetric rings

Department of Engineering Science, National Taiwan University, 1, Sec. 4, Roosevelt Road, Taipei 10660, Taiwan

^a e-mail: hsuehwj@ntu.edu.tw

Received: 29 October 2012
Received in final form: 15 November 2012
Published online: 28 January 2013

Abstract

Occurrence of resonant transport due to Fabry-Perot like effect through cascade double asymmetric rings is proposed. We find that high performance reflectors with wide bands can be generated by two asymmetrical open rings with an arm ratio of 1/3. At the resonances, giant persistent currents exist in both rings of the system. The resonance energy is variant and dependent on the length of the connected wire. However, the confined space of the system at the resonance is not equal to the integral multiple of a half-wavelength of traditional Fabry-Perot etalons.