Transport spectroscopy in a time-modulated open quantum dot

C. S. Tang, Y. H. Tan, Chon-Saar Chu

Research output: Contribution to journalArticle

20 Scopus citations

Abstract

We have investigated the time-modulated coherent quantum transport phenomenon in a ballistic open quantum dot. Conductance G and the electron dwell time in the dots are calculated by a time-dependent mode-matching method. Under high-frequency modulation, the traversing electrons are found to exhibit three types of resonant scatterings. They are intersideband scatterings into quasibound states in the dots, into true bound states in the dots, and into quasibound states just beneath the subband threshold in the leads. Dip structures or fano structures in G are their signatures. Our results show structures due to 2ħω intersideband processes. At the above scattering resonances, we have estimated, according to our dwell time calculation, the number of round-trip scatterings which the traversing electrons undertake between the two dot openings.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume67
Issue number20
DOIs
StatePublished - 30 May 2003

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