Recent Submissions

  • Generation of cylindrical vector beams with few-mode fibers excited by Laguerre–Gaussian beams 

    Volpe, Giovanni; Petrov, D. (Elsevier, 2004-07-01)
    We propose a novel method to efficiently produce light beams with radial, azimuthal, and hybrid polarization, through a few-mode fiber excited by a Laguerre–Gaussian beam. With different input polarization we can selectively ...
  • Surface plasmon radiation forces 

    Volpe, Giovanni; Quidant, R.; Badenes, G.; Petrov, D. (The American Physical Society, 2006-06)
    We report the first experimental observation of momentum transfer from a surface plasmon to a single dielectric sphere. Using a photonic force microscope, we measure the plasmon radiation forces on different polystyrene ...
  • Torque detection using brownian fluctuations 

    Volpe, Giovanni; Petrov, D. (The American Physical Society, 2006-11-24)
    We report the statistical analysis of the movement of a submicron particle confined in a harmonic potential in the presence of a torque. The absolute value of the torque can be found from the auto- and cross-correlation ...
  • Quantitative assessment of non-conservative radiation forces in an optical trap 

    Pesce, G.; Volpe, Giovanni; De Luca, A. C.; Rusciano, G.; Volpe, G. (Institute of Physics Publishing, 2009-05)
    The forces acting on an optically trapped particle are usually assumed to be conservative. However, the presence of a non-conservative component has recently been demonstrated. Here, we propose a technique that permits one ...
  • Novel perspectives for the application of total internal reflection microscopy 

    Volpe, Giovanni; Brettschneider, T.; Helden, L.; Bechinger, C. (Optical Society of America, 2009-12)
    Total Internal Reflection Microscopy (TIRM) is a sensitive non-invasive technique to measure the interaction potentials between a colloidal particle and a wall with femtonewton resolution. The equilibrium distribution of ...
  • Influence of noise on force measurements 

    Volpe, Giovanni; Helden, L.; Brettschneider, T.; Wehr, J.; Bechinger, C. (The American Physical Society, 2010-04)
    We demonstrate how the ineluctable presence of thermal noise alters the measurement of forces acting on microscopic and nanoscopic objects. We quantify this effect exemplarily for a Brownian particle near a wall subjected ...
  • Microswimmers in patterned environments 

    Volpe, Giovanni; Buttinoni, I.; Vogt, D.; Kümmerer, H.- J.; Bechinger, C. (The Royal Society of Chemistry, 2011-07-14)
    Tiny self-propelled swimmers capable of autonomous navigation through complex environments provide appealing opportunities for localization, pick-up and delivery of microscopic and nanoscopic objects. Inspired by motile ...
  • Printed multilayer superstructures of aligned single-walled carbon nanotubes for electronic applications 

    Kang, S. J.; Kocabaş, Coşkun; Kim, H.-S.; Cao, Q.; Meitl, M. A.; Khang, D.-Y.; Rogers, J. A. (American Chemical Society, 2007-10)
    We developed means to form multilayer superstructures of large collections of single-walled carbon nanotubes (SWNTs) configured in horizontally aligned arrays, random networks, and complex geometries of arrays and networks ...
  • Molecular scale buckling mechanics in individual aligned single-wall carbon nanotubes on elastomeric substrates 

    Khang, D. -Y.; Xiao, J.; Kocabaş, Coşkun; MacLaren, S.; Banks, T.; Jiang, H.; Huang, Y. Y.; Rogers, J. A. (American Chemical Society, 2008)
    We have studied the scaling of controlled nonlinear buckling processes in materials with dimensions in the molecular range (i.e., ∼1 nm) through experimental and theoretical studies of buckling in individual single-wall ...
  • A 500 MHz carbon nanotube transistor oscillator 

    Pesetski, A. A.; Baumgardner, J. E.; Krishnaswamy, S. V.; Zhang, H.; Adam, J. D.; Kocabaş, Coşkun; Banks, T.; Rogers, J. A. (American Institute of Physics, 2008-09)
    Operation of a carbon nanotube field effect transistor (FET) oscillator at a record frequency of 500 MHz is described. The FET was fabricated using a large parallel array of single-walled nanotubes grown by chemical vapor ...
  • Alignment controlled growth of single-walled carbon nanotubes on quartz substrates 

    Xiao, J.; Dunham, S.; Liu, P.; Zhang, Y.; Kocabaş, Coşkun; Moh, L.; Huang, Y.; Hwang, K. -C.; Lu, C.; Huang, W.; Rogers, J. A. (American Chemical Society, 2009-09-11)
    Single-walled carbon nanotubes (SWNTs) possess extraordinary electrical properties, with many possible applications in electronics. Dense, horizonally aligned arrays of linearly configured SWNTs represent perhaps the most ...
  • High-frequency performance of submicrometer transistors that use aligned arrays of single-walled carbon nanotubes 

    Kocabaş, Coşkun; Dunham, S.; Cao, Q.; Cimino, K.; Ho, X.; Kim, H.-S.; Dawson, D.; Payne, J.; Stuenkel, M.; Zhang, H.; Banks, T.; Feng, M.; Rotkin, S. V.; Rogers, J. A. (American Chemical Society, 2009-04-08)
    The unique electronic properties of single-walled carbon nanotubes (SWNTs) make them promising candidates for next generation electronics, particularly in systems that demand high frequency (e.g., radio frequency, RF) ...
  • Distributed contact flip chip InGaN/GaN blue LED; comparison with conventional LEDs 

    Genç, M.; Sheremet, Volodymyr; Elçi, M.; Kasapoğlu, A.; Altuntaş, İ.; Demir, İ.; Eğin, G.; İslamoğlu, Serkan; Gür, E.; Muzafferoğlu, N.; Elagöz, S.; Gülseren, Oğuz; Aydınlı, A. (Elsevier, 2019)
    This paper presents high performance, GaN/InGaN-based light emitting diodes (LEDs) in three different device configurations, namely Top Emitting (TE) LED, conventional Flip Chip (FC) and Distributed Contact (DC) FC. Series ...
  • Ethnic conflict and gender inequality in education: the case of Turkey 

    Kılınç, Ramazan; Neathery-Castro, J.; Akyüz, Selin (Routledge, 2018-04)
    Although conflict remains a major obstacle to development in many areas of the world, its impact on education has been rarely studied. This article investigates the relationship between conflict and gender equality, focusing ...
  • Growth and characterization of nanocrystalline SrTiOx films: room temperature deposition using RF sputtering system in a pure argon environment 

    Bayrak, Türkan; Goldenberg, Eda (Institute of Physics Publishing, 2017-05)
    We report a comprehensive description of the structure, optical and electrical properties of asdeposited and annealed SrTiOx (STO) thin films. Nanocrystalline STO films were deposited on p-type Si (1 0 0) and UV-grade fused ...
  • Negative refraction and subwavelength focusing using photonic crystals 

    Özbay, Ekmel; Aydın, Koray; Alıcı, Kamil Boratay; Güven, Kaan (SPIE, 2005-01)
    We review certain novel optical properties of two-dimensional dielectric photonic crystals (PCs) which exhibit negative refraction behavior. We investigate two mechanisms which utilize the band structure of the PC and lead ...
  • Experimental analysis of true left-handed behaviour and transmission properties of composite metamaterials 

    Güven, Kaan; Aydın, Koray; Özbay, Ekmel (Elsevier, 2005-12)
    We report the true left-handed transmission of a composite metamaterial (CMM) consisting of periodically stacked split-ring resonator (SRR) and wire elements. The negative permeability (μ < 0) gap is demonstrated explicitly ...
  • Spectroscopic ellipsometric study of Ge nanocrystals embedded in SiO 2 using parametric models 

    Basa, P.; Petrik, P.; Fried, M.; Dâna, Aykutlu; Aydınlı, Atilla; Foss, S.; Finstad, T. G. (Wiley, 2008-05)
    Ge-rich SiO2 layers on top of Si substrates were deposited using plasma enhanced chemical vapour deposition. Ge nanocrystals embedded in the SiO2 layers were formed by high temperature annealing. The samples were measured ...
  • Soliton-similariton fibre laser 

    Öktem, Bülent; Ülgüdür, Coşkun; İlday, F. Ömer (Macmillan Publishers, 2010-03-21)
    Rapid progress in passively mode-locked fibre lasers is currently driven by the recent discovery of new mode-locking mechanisms, namely, the self-similarly evolving pulse (similariton) and the all-normal-dispersion ...
  • Slowing surface plasmon polaritons on plasmonic coupled cavities by tuning grating grooves 

    Balcı, Sinan; Kocabaş, Aşkın; Kocabaş, Coşkun; Aydınlı, Atilla (American Institute of Physics, 2010-09)
    We investigate slow surface plasmon polaritons (SPPs) in plasmonic waveguiding bands formed by coupled plasmonic cavities on Moiŕ surfaces. We demonstrate controlling the group velocity and dispersion of the SPPs by varying ...

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