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All optical preparation, storage and readout of a single spin in an individual quantum dot

Mon, 2013-02-11 20:17 - Daniel Rudolph
Date: 
2012-02-09
Author(s): 

V. Jovanov, F. Klotz, S. Kapfinger, D. Heiss, S. Spiga, D. Rudolph, M. Bichler, M. S. Brandt, G. Abstreiter, J. J. Finley

Reference: 

Proc. SPIE 8272, 827211 (2012)

URL: 

http://dx.doi.org/10.1117/12.907791

 

Quantum dynamics of damped and driven anharmonic oscillators

Mon, 2013-02-11 20:13 - Daniel Rudolph
Date: 
2012-04-12
Author(s): 

M. Schrapp, E. del Valle, J. J. Finley, F. P. Laussy

Reference: 

Phys. Status Solidi C 9, 1296 (2012)

URL: 

http://onlinelibrary.wiley.com/doi/10.1002/pssc.201100195/abstract

We study various techniques to characterize the quantum states of a strongly dissipative system, namely, the an-harmonic oscillator. One cannot directly access the quantum states themselves but only transitions between them. Various methods bring various advantages and inconvenients. We compare several observables under coherent and incoherent excitation.

A Waveguide-Coupled On-Chip Single-Photon Source

Mon, 2013-02-11 20:09 - Daniel Rudolph
Date: 
2012-03-29
Author(s): 

A. Laucht, S. Pütz, T. Günthner, N. Hauke, R. Saive, S. Frédérick, M. Bichler, M.-C. Amann, A. W. Holleitner, M. Kaniber1, and J. J. Finley

Reference: 

Phys. Rev. X 2, 011014 (2012)

URL: 

http://link.aps.org/doi/10.1103/PhysRevX.2.011014

Highly nonlinear excitonic Zeeman spin splitting in composition-engineered artificial atoms

Mon, 2013-02-11 20:08 - Daniel Rudolph
Date: 
2012-04-16
Author(s): 

V. Jovanov, T. Eissfeller, S. Kapfinger, E. C. Clark, F. Klotz, M. Bichler, J. G. Keizer, P. M. Koenraad, M. S. Brandt, G. Abstreiter, and J. J. Finley

Reference: 

Phys. Rev. B 85, 165433 (2012)

URL: 

http://link.aps.org/doi/10.1103/PhysRevB.85.165433

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

Mon, 2013-02-11 20:06 - Daniel Rudolph
Date: 
2012-05-08
Author(s): 

K. Müller, A. Bechtold, C. Ruppert, M. Zecherle, G. Reithmaier, M. Bichler, H. J. Krenner, G. Abstreiter, A. W. Holleitner, J. M. Villas-Boas, M. Betz, and J. J. Finley

Reference: 

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

URL: 

http://link.aps.org/doi/10.1103/PhysRevLett.108.197402

High-fidelity optical preparation and coherent Larmor precession of a single hole in an (In,Ga)As quantum dot molecule

Mon, 2013-02-11 20:04 - Daniel Rudolph
Date: 
2012-06-20
Author(s): 

K. Müller, A. Bechtold, C. Ruppert, C. Hautmann, J. S. Wildmann, T. Kaldewey, M. Bichler, H. J. Krenner, G. Abstreiter, M. Betz, and J. J. Finley

Reference: 

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

URL: 

http://link.aps.org/doi/10.1103/PhysRevB.85.241306

Broadband Purcell enhanced emission dynamics of quantum dots in linear photonic crystal waveguides

Mon, 2013-02-11 20:02 - Daniel Rudolph
Date: 
2012-11-09
Author(s): 

A. Laucht, T. Günthner, S. Pütz, R. Saive, S. Frédérick, N. Hauke, M. Bichler, M.-C. Amann, A. W. Holleitner, M. Kaniber, and J. J. Finley

Reference: 

J. Appl. Phys. 112, 093520 (2012)

URL: 

http://dx.doi.org/10.1063/1.4764923

Coupling of guided Surface Plasmon Polaritons to proximal self-assembled InGaAs Quantum Dots

Mon, 2013-02-11 19:36 - Daniel Rudolph
Date: 
2012-03-22
Author(s): 

G. Bracher, K. Schraml, M. Blauth, C. Jakubeit, K. Müller, G. Koblmüller, M. Bichler, M. Kaniber, J. J. Finley

Reference: 

arXiv:1203.4671 [physics.optics]

URL: 

http://arxiv.org/abs/1203.4671

We present investigations of the propagation length of guided surface plasmon polaritons along Au waveguides on GaAs and their coupling to near surface InGaAs self-assembled quantum dots. Our results reveal surface plasmon propagation lengths ranging from 13.4 {\pm} 1.7 {\mu}m to 27.5 {\pm} 1.5 {\mu}m as the width of the waveguide increases from 2-5 {\mu}m. Experiments performed on active structures containing near surface quantum dots clearly show that the propagating plasmon mode excites the dot, providing a new method to spatially image the surface plasmon mode.

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

Mon, 2013-02-11 19:34 - Daniel Rudolph
Date: 
2012-07-30
Author(s): 

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

Reference: 

arXiv:1207.6952 [cond-mat.mes-hall]

URL: 

http://arxiv.org/abs/1207.6952

We describe how complex fluctuations of the local environment of an optically active quantum dot can leave rich fingerprints in its emission spectrum. A new feature, termed "Fluctuation Induced Luminescence" (FIL), is observed to arise from extremely rare fluctuation events that have a dramatic impact on the response of the system-so called "black swan" events. A quantum dissipative master equation formalism is developed to describe this effect phenomenologically.

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

Mon, 2013-02-11 19:33 - Daniel Rudolph
Date: 
2012-12-12
Author(s): 

K. Müller, T. Kaldewey, R. Ripszam, J. S. Wildmann, A. Bechtold, M. Bichler, G. Koblmüller, G. Abstreiter, J. J. Finley

Reference: 

arXiv:1212.2993 [cond-mat.mes-hall]

URL: 

http://arxiv.org/abs/1212.2993

The ability to control and exploit quantum coherence and entanglement drives research across many fields ranging from ultra-cold quantum gases to spin systems in condensed matter. Transcending different physical systems, optical approaches have proven themselves to be particularly powerful, since they profit from the established toolbox of quantum optical techniques, are state-selective, contact-less and can be extremely fast.

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