Browsing by Subject "Quantum dots"

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  • Biofunctional quantum dots as fluorescence probe for cell-specific targeting 
    Ag, Didem; Bongartz, Rebecca; Dogan, Leyla Eral; Seleci, Muharrem; Walter, Johanna-Gabriela; Demirkol, Dilek Odaci; Stahl, Frank; Ozcelik, Serdar; Timur, Suna; Scheper, Thomas (Amsterdam : Elsevier, 2014)
    We describe here the synthesis, characterization, bioconjugation, and application of water-soluble thioglycolic acid TGA-capped CdTe/CdS quantum dots (TGA-QDs) for targeted cellular imaging. Anti-human epidermal growth ...
  • Channel blockade in a two-path triple-quantum-dot system 
    Kotzian, M.; Gallego-Marcos, F.; Platero, G.; Haug, Rolf J. (College Park, MD : American Physical Society, 2016)
    Electronic transport through a two-path triple-quantum-dot system with two source leads and one drain is studied and the interaction between the two paths is analyzed. We observe a channel blockade as a result of interchannel ...
  • Charge reconfiguration in arrays of quantum dots 
    Bayer, Johannes C.; Wagner, Timo; Rugeramigabo, Eddy P.; Haug, Rolf J. (College Park, MD : American Physical Society, 2017)
    Semiconductor quantum dots are potential building blocks for scalable qubit architectures. Efficient control over the exchange interaction and the possibility of coherently manipulating electron states are essential ...
  • Development of semiconductor light sources for photonic-enabled quantum communication 
    Jingzhong, Yang (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2023)
    Quantum information technologies have attracted tremendous attentions and development efforts by worldwide research organizations and governments in the past decades. It comprises the generation, manipulation, and transfer ...
  • Electron correlation effects in lateral quantum dots 
    Tutuc, Daniel (Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2011)
    [no abstract]
  • Entangled-photons generation with quantum dots 
    Li, Yuan; Ding, Fei; Schmidt, Oliver G. (Bristol, UK : Institute of Physics (IOP), 2018)
    Entanglement between particles is a crucial resource in quantum information processing, an important example of which is the exploitation of entangled photons in quantum communication protocols. Among the different available ...
  • High-order cumulants in the counting statistics of asymmetric quantum dots 
    Fricke, Christian; Hohls, Frank; Sethubalasubramanian, Nandhavel; Fricke, Lukas; Haug, Rolf J. (College Park, MD : American Institute of Physics, 2010)
    Measurements of single electron tunneling through a quantum dot (QD) using a quantum point contact as charge detector have been performed for very long time traces with very large event counts. This large statistical basis ...
  • Highly-efficient extraction of entangled photons from quantum dots using a broadband optical antenna 
    Chen, Yan; Zopf, Michael; Keil, Robert; Ding, Fei; Schmidt, Oliver G. (London : Nature Publishing Group, 2018)
    Many quantum photonic technologies require the efficient generation of entangled pairs of photons, but to date there have been few ways to produce them reliably. Sources based on parametric down conversion operate at very ...
  • Optical Amplification of Spin Noise Spectroscopy via Homodyne Detection 
    Sterin, Pavel; Wiegand, Julia; Hübner, Jens; Oestreich, Michael (College Park, MD : American Physical Society, 2018-03-05)
    Spin noise (SN) spectroscopy measurements on delicate semiconductor spin systems, like single (In,Ga) As quantum dots, are currently not limited by optical shot noise but rather by the electronic noise of the detection ...
  • Photoneutralization of charges in GaAs quantum dot based entangled photon emitters 
    Yang, Jingzhong; Fandrich, Tom; Benthin, Frederik; Keil, Robert; Sharma, Nand Lal; Nie, Weijie; Hopfmann, Caspar; Schmidt, Oliver G.; Zopf, Michael; Ding, Fei (College Park, MD : American Physical Society, 2022-03-03)
    Semiconductor-based emitters of pairwise photonic entanglement are a promising constituent of photonic quantum technologies. They are known for the ability to generate discrete photonic states on-demand with low multiphoton ...
  • Piezoelectric screening in single InAs/AlAs quantum dots 
    Sarkar, D.; Van Der Meulen, H.P.; Calleja, J.M.; Meyer, J.M.; Haug, Rolf J.; Pierz, Klaus (College Park, MD : American Institute of Physics, 2009)
    Micro-photoluminescence spectroscopy for varying temperature, excitation intensity and energy was performed on a single InAs/AlAs self-assembled quantum dot. A broad sideband at 1.2 meV of the zero phonon line is attributed ...
  • Probing spin configurations in quantum dots 
    Rogge, M.C.; Fühner, C.; Haug, Rolf J. (College Park, MD : American Institute of Physics, 2007)
    We study the magnetoconductance of lateral quantum dots in high magnetic fields. We use spin blockade and Kondo effect to investigate the spin configuration and the spin filling mechanism and find a dependence on the ...
  • Quantum dot device tunable from single to triple dot system 
    Rogge, M.C.; Pierz, Klaus; Haug, Rolf J. (College Park, MD : American Institute of Physics, 2013)
    We present a lateral quantum dot device which has a tunable number of quantum dots. Depending on easily tunable gate voltages, one, two or three quantum dots are found. They are investigated in transport and charge detection. ...
  • The rise of spin noise spectroscopy in semiconductors: From acoustic to GHz frequencies 
    Hübner, Jens; Berski, Fabian; Dahbashi, Ramin; Oestreich, Michael (Weinheim : Wiley-VCH Verlag, 2016)
    This article gives an overview on the advance of spin noise spectroscopy (SNS) in semiconductors in the past 8 years from the first measurements in bulk n-GaAs [Oestreich et al., Phys. Rev. Lett. 95, 216603 (2005)] up to ...
  • Spin droplet formation in quantum dots 
    Rogge, M.C.; Räsänen, E.; Haug, Rolf J. (College Park, MD : American Institute of Physics, 2011)
    A lateral quantum dot with approx. 50 electrons is analyzed in high perpendicular magnetic fields. In a regime with two Landau levels (LL) in the quantum dot information about the spin structure is gained by investigating ...
  • Statistical limits for entanglement swapping with semiconductor entangled photon sources 
    Yang, Jingzhong; Zopf, Michael; Li, Pengji; Sharma, Nand Lal; Nie, Weijie; Benthin, Frederik; Fandrich, Tom; Rugeramigabo, Eddy P.; Hopfmann, Caspar; Keil, Robert; Schmidt, Oliver G.; Ding, Fei (Ridge, NY : American Physical Society (APS), 2022-06-23)
    Semiconductor quantum dots are promising building blocks for quantum communication applications. Al- though deterministic, efficient, and coherent emission of entangled photons has been realized, implementing a practical ...
  • Theranostic liposome–nanoparticle hybrids for drug delivery and bioimaging 
    Seleci, Muharrem; Ag Seleci, Didem; Scheper, Thomas; Stahl, Frank (Basel : MDPI AG, 2017)
    Advanced theranostic nanomedicine is a multifunctional approach which combines the diagnosis and effective therapy of diseased tissues. Here, we investigated the preparation, characterization and in vitro evaluation of ...
  • Transferrin-decorated niosomes with integrated inp/zns quantum dots and magnetic iron oxide nanoparticles: Dual targeting and imaging of glioma 
    Seleci, Didem Ag; Maurer, Viktor; Barlas, Firat Baris; Porsiel, Julian Cedric; Temel, Bilal; Ceylan, Elcin; Timur, Suna; Stahl, Frank; Scheper, Thomas; Garnweitner, Georg (Basel : MDPI, 2021)
    The development of multifunctional nanoscale systems that can mediate efficient tumor targeting, together with high cellular internalization, is crucial for the diagnosis of glioma. The combination of imaging agents into ...
  • Transportspektroskopie an Quantenpunkten im Kondo-Regime 
    Heine, Alexander Wieland (Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2016)
    [no abstract]