1. High Q electromechanics with InAs nanowire quantum dots
- Author
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Shamashis Sengupta, Sudipta Dubey, Vibhor Singh, Hari S. Solanki, Anil Kumar, S. Ramakrishnan, Arnab Bhattacharya, Aashish A. Clerk, Sajal Dhara, and Mandar M. Deshmukh
- Subjects
Physics ,Condensed Matter - Mesoscale and Nanoscale Physics ,Physics and Astronomy (miscellaneous) ,Condensed matter physics ,Nanowire ,FOS: Physical sciences ,Resonance ,Coulomb blockade ,Fano resonance ,Electron ,Condensed Matter::Mesoscopic Systems and Quantum Hall Effect ,Quantum dot ,Mesoscale and Nanoscale Physics (cond-mat.mes-hall) ,Mechanical resonance ,Quantum tunnelling - Abstract
In this report, we study electromechanical properties of a suspended InAs nanowire (NW) resonator. At low temperatures, the NW acts as the island of a single electron transistor (SET) and we observe a strong coupling between electrons and mechanical modes at resonance; the rate of electron tunneling is approximately 10 times the resonant frequency. Above and below the mechanical resonance, the magnitude of Coulomb peaks is different and we observe Fano resonance in conductance due to the interference between two contributions to potential of the SET. The quality factor ($Q$) of these devices is observed $\sim10^5$ at 100 mK., Comment: 4 pages. Supplementary material at http://www.tifr.res.in/~nano
- Published
- 2011
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