Browsing by Subject "Electric fields"

Now showing items 1-11 of 11

    • Article  

      Alignment of electrospun polymer fibers using a concave collector 

      Savva, I.; Evaggelou, E.; Papaparaskeva, G.; Leontiou, T.; Stylianopoulos, T.; Mpekris, F.; Stylianou, K.; Krasia-Christoforou, T. (2015)
      During recent years, electrospinning has become a powerful technique for the cost-effective production of fibrous materials with diameters ranging from a few nanometers up to a few micrometers. In a conventional electrospinning ...
    • Article  

      A folded-monopole model for electrically small NRI-TL metamaterial antennas 

      Antoniades, Marcos A.; Eleftheriades, G. V. (2008)
      An improved model for analyzing electrically small NRI-TL antennas is proposed, that highlights the methods that enable these antennas to offer a good impedance match and a high radiation efficiency compared to previously ...
    • Article  

      InAs quantum dots grown by molecular beam epitaxy on GaAs (211)B polar substrates 

      Zervos, Matthew; Xenogianni, C.; Deligeorgis, G.; Androulidaki, M.; Savvidis, P. G.; Hatzopoulos, Z.; Pelekanos, N. T. (2006)
      InAs nanostructures were grown by molecular beam epitaxy on GaAs (211)B at temperatures between 400-530 °C and growth rates that were varied between 0.1 to 0.02 mono-layers (ML) per second. For temperatures up to 500 °C ...
    • Article  

      Influence of polarization field on the lasing properties of III-nitride quantum wells 

      Dialynas, G. E.; Deligeorgis, G.; Zervos, Matthew; Pelekanos, N. T. (2006)
      A theoretical investigation of the effect of polarization-induced fields on the optoelectronic properties of a 3 nm In0.2Ga0.8N/GaN single quantum well has been carried out via a self-consistent solution of Schrödinger-Poisson ...
    • Article  

      Internal field effects on the lasing characteristics of InGaN/GaN quantum well lasers 

      Dialynas, G. E.; Deligeorgis, G.; Zervos, Matthew; Pelekanos, N. T. (2008)
      A theoretical investigation of Inx Ga1-x N/GaN single quantum well lasers with x in the range 0.05≤x≤0.3 is carried out via self-consistent Schrödinger-Poisson calculations in the effective mass approximation in order to ...
    • Article  

      Localized magnetic fields in arbitrary directions using patterned nanomagnets 

      McNeil, R. P. G.; Schneble, R. J.; Kataoka, M.; Ford, C. J. B.; Kasama, T.; Dunin-Borkowski, R. E.; Feinberg, J. M.; Harrison, R. J.; Barnes, C. H. W.; Tse, D. H. Y.; Trypiniotis, Theodossis; Bland, J. A. C.; Anderson, D.; Jones, G. A. C.; Pepper, M. (2010)
      Control of the local magnetic fields desirable for spintronics and quantum information technology is not well developed. Existing methods produce either moderately small local fields or one field orientation. We present ...
    • Article  

      Multiband compact printed dipole antennas using NRI-TL metamaterial loading 

      Antoniades, Marcos A.; Eleftheriades, G. V. (2012)
      A compact, fully-printed negative-refractive-index transmission-line (NRI-TL) metamaterial-loaded dipole antenna is proposed, which exhibits multiband resonant characteristics that are not harmonically related. The multiband ...
    • Conference Object  

      Novel nonlocal gauge functions in electrodynamics and their effect on quantum mechanical phases 

      Moulopoulos, Konstantinos (2011)
      We point to previously overlooked solutions of the standard gauge transformation equations of Electrodynamics: the generalized "gauge functions" go beyond the usual Dirac phase factors (spatial or temporal integrals of ...
    • Article  

      Spin current depolarization under high electric fields in undoped InGaAs 

      Okamoto, N.; Kurebayashi, H.; Harii, K.; Kajiwara, Y.; Beere, H.; Farrer, I.; Trypiniotis, Theodossis; Ando, K.; Ritchie, D. A.; Barnes, C. H. W.; Saitoh, E. (2011)
      Carrier spin polarization in In0.13Ga0.87 As under high electric fields has been investigated. The spin polarization was created by optical spin orientation techniques and the inverse spin-Hall effect was employed to measure ...
    • Doctoral Thesis  Open Access

      Topological and conventional quantum matter in strong magnetic and electric fields : ground state thermodynamic and transport considerations 

      Konstantinou, Georgios N. (Πανεπιστήμιο Κύπρου, Σχολή Θετικών και Εφαρμοσμένων Επιστημών / University of Cyprus, Faculty of Pure and Applied Sciences, 2016-05)
      Η παρούσα διατριβή επικεντρώνεται στη μελέτη της θερμοδυναμικής ηλεκτρονικών συστημάτων (τοπολογικών ή συμβατικών) στην θεμελιώδη τους κατάσταση, όταν μερικές εξωτερικές παράμετροι μεταβάλλονται (π.χ. το πάχος μιας ...
    • Conference Object  

      Tunable excitons in gated graphene systems 

      Djotyan, Anahit P.; Avetisyan, A. A.; Moulopoulos, Konstantinos (SPIE, 2017)
      We develop a microscopic theory of a strong electromagnetic radiation interaction with bilayer graphene where an energy gap is opened by a static electric field perpendicular to graphene planes. We show that an adiabatic ...