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WALTER SCHOTTKY INSTITUTE Fundamental research in semiconductor electronics - WSI
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Alexander Bechtold

 
Room: S107
Category: Doctoral Candidates
Phone: 11481
Email: Alexander.Bechtold(at)wsi.tum.de

I am a PhD student in the group of J. J. Finley. My present work is focused on optical preparation and readout of a single electron spin in an individual self-assembled quantum dot. The methods combine spin to charge conversion with luminescence recycling and are applied to optically probe the spin relaxation dynamics. Importantly, this approach allows to probe the dynamics of a single spin over ultra long timescales (≥200μs), generally inaccessible to optical single spin readout. The spin of electrons trapped in quantum dots are promising candidates to be used as quantum bits, the fundamental logical unit in future quantum information processing.

Publications

Probing ultrafast carrier tunneling dynamics in individual quantum dots and molecules

Ann. Phys., 525: 49–58 (2013), DOI: 10.1002/andp.201200195

K. Mueller | A. Bechtold | C. Ruppert | T. Kaldewey | M. Zecherle | J. Wildmann | M. Bichler | H. Krenner | J. M. Villas-Boas | G. Abstreiter | M. Betz | J. Finley

Online Reference

All optical quantum control of a spin-quantum state and ultrafast transduction into an electric current

  arXiv:1212.2993 (2012)

K. Mueller | T. Kaldewey | R. Ripszam | J. Wildmann | A. Bechtold | M. Bichler | G. Koblmueller | G. Abstreiter | J. Finley

Online Reference

Electrical Control of Interdot Electron Tunneling in a Double InGaAs Quantum-Dot Nanostructure

Phys. Rev. Lett. 108, 197402 (2012)

K. Mueller | A. Bechtold | C. Ruppert | M. Zecherle | G. Reithmaier | M. Bichler | H. Krenner | G. Abstreiter | A. Holleitner | J. M. Villas-Boas | J. Finley

Online Reference

Fluctuation induced luminescence sidebands in the emission spectra of resonantly driven quantum dots

arXiv:1207.6952 (2012)

 

F. Laussy | V. Jovanov | E. del Valle | A. Bechtold | S. Kapfinger | K. Mueller | S. Koch | A. Laucht | T. Eissfeller | M. Bichler | G. Abstreiter | J. Finley

Online Reference

High fidelity optical preparation and coherent Larmor precession of a single hole in an InGaAs quantum dot molecule

Phys. Rev. B 85, 241306(R) (2012)

(selected as Editors' Suggestion)

K. Mueller | A. Bechtold | C. Ruppert | C. Hautmann | J. Wildmann | T. Kaldewey | M. Bichler | H. Krenner | G. Abstreiter | M. Betz | J. Finley

Online Reference

Probing ultrafast charge and spin dynamics in a quantum dot molecule

Proc. of SPIE Vol. 8260, 826002 (2012)

K. Mueller | A. Bechtold | C. Ruppert | H. Krenner | M. Bichler | J. M. Villas-Boas | G. Abstreiter | M. Betz | J. Finley

Online Reference

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TUM Technische Universität München TUM Technische Universität München Physik Department Elektrotechnik und Informationstechnik TUM Technische Universität München
 

News at the WSI

01 Apr 2013

Prof. Dr. Jonathan J. Finley new head of chair E24 - Prof. Dr. Gerhard Abstreiter new director of TUM-IAS   more

07 Jan 2013

Bavarian Academy of Sciences awards Robert-Sauer prize to Dr. Ulrich Rant   more

29 Oct 2012

Anouncement: A scientific symposium in memory of Professor Dr. Frederick Koch on November 23.   more

25 Sep 2012

ERC Grant for Prof. Alexander Holleitner (WSI and Physik-Department, TUM)   more

14 Sep 2012

Best Student paper award for Tobias Gruendl   more

Forthcoming seminars

May 28, 2013

A multichannel low noise amplifier system for chip-based bioelectronic devices   more

 
 
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