Exploració per tema "Nanofotònica"

Ara es mostren els items 1-19 de 19

    • A bright single photon source: Strong coupling of a single molecule to a plasmonic nano-antenna cavity 

      Izquierdo López, Raúl (Universitat Politècnica de Catalunya, 2019-07-23)
      Projecte Final de Màster Oficial
      Accés obert
      Single photon emitters are quantum light sources that can enable a variety of quantum based technologies such as quantum information or quantum random number generation, among others. These single photon emitters can have ...

    • Biopolymer photonics: from nature to nanotechnology 

      Vogler-Neuling, Viola; Saba, Matthias; Gunkel, Ilja; Zoppe, Justin Orazio; Steiner, Ullrich; Wilts, Bodo; Dodero, Andrea (2023-08-27)
      Article
      Accés obert
      Biopolymers offer vast potential for renewable and sustainable devices. While nature mastered the use of biopolymers to create highly complex 3D structures and optimized their photonic response, artificially created ...

    • Dispersion management in spatially modulated broad band semiconductors 

      Herrero Simon, Ramon; Botey Cumella, Muriel; Khumar, N.P.; Staliunas, Kestutis (IEEE, 2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial

    • Effects of photon reabsorption phenomena in confocal micro-photoluminescence measurements in crystalline silicon 

      Roige, Abel; Alvarez, J.; Jaffre, A.; Desrues, T.; Martín García, Isidro; Alcubilla González, Ramón; Kleider, J.P. (American Institute of Physics (AIP), 2017-02-14)
      Article
      Accés obert
      Confocal micro-photoluminescence (PL) spectroscopy has become a powerful characterization technique for studying novel photovoltaic (PV) materials and structures at the micrometer level. In this work, we present a comprehensive ...

    • Extremely narrow, sharp-peaked resonances at the edge of the continuum 

      Lukošiunas, Ignas; Grineviciute, Lina; Nikitina, Julianija; Gailevicius, Darius; Staliunas, Kestutis (2022-11-03)
      Report de recerca
      Accés obert
      We report a critical narrowing of resonances of a driven potential well, when their eigenfrequencies approach the edge of the continuum. The resonances also obtain unusual sharp-peak shapes at the continuum boundary. The ...

    • Flat focusing mirror 

      Cheng, Yu Chieh; Kicas, Simonas; Trull Silvestre, José Francisco; Peckus, Martynas; Cojocaru, Crina; Vilaseca Alavedra, Ramon; Drazdys, Ramutis; Staliunas, Kestutis (MACMILLAN PUBLISHERS LIMITED, 2014-09-17)
      Article
      Accés obert
      The control of spatial propagation properties of narrow light beams such as divergence, focusing or imaging are main objectives in optics and photonics. In this letter, we propose and demonstrate experimentally a flat ...

    • Graphene optoelectronics from the visible to the mid-infrared 

      Badioli, Michela (Universitat Politècnica de Catalunya, 2015-12-04)
      Tesi
      Accés obert
      Since its discovery in 2004, graphene, a one-atom-thick layer of carbon atoms arranged in a hexagonal lattice, has attracted huge interest from the scientific community due to its extraordinary electronic, mechanical, and ...

    • Large nonlinear efficiency enhancement in the visible and UV range from plasmonic gold nanogratings 

      Cojocaru, Crina; Mukhopadhyay, Shroddha; Rodríguez Suñé, Laura; Vicenti, Maria Antonietta; Vilaseca Alavedra, Ramon; Scalora, Michael; Trull Silvestre, José Francisco (Institute of Electrical and Electronics Engineers (IEEE), 2023)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      We report a combined experimental/theoretical investigation on second and third harmonic generation from a plasmonic gold nanograting, that exhibits a plasmonic resonance in the near IR. The intense field localization leads ...

    • Machine learning for knowledge acquisition and accelerated inverse-design for non-Hermitian systems 

      Ahmed, Waqas W.; Farhat, Mohamed; Staliunas, Kestutis; Zhang, Xiangliang; Wu, Ying (2023-12-01)
      Article
      Accés obert
      Non-Hermitian systems offer new platforms for unusual physical properties that can be flexibly manipulated by redistribution of the real and imaginary parts of refractive indices, whose presence breaks conventional wave ...

    • Modeling, simulation and analysis of a high-speed quantum random number generator 

      Bolívar López, Pablo (Universitat Politècnica de Catalunya, 2020-10-19)
      Projecte Final de Màster Oficial
      Accés restringit per acord de confidencialitat

    • PT-axisymmetric photonic nanostructures 

      Ahmed Waseem, Waqas Waseem; Botey Cumella, Muriel; Herrero Simon, Ramon; Staliunas, Kestutis (2016)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Optical Parity-Time (PT-) symmetric systems support unusual properties. When the symmetric coupling between internal modes is broken the system becomes strongly unidirectional resulting in novel effects such as asymmetric ...

    • PT-axisymmetric VCSELs with linear central defect 

      Ahmed Waseem, Waqas Waseem; Botey Cumella, Muriel; Herrero Simon, Ramon; Staliunas, Kestutis (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Text en actes de congrés
      Accés obert
      Semiconductor Lasers and particularly Vertical-Cavity Surface-Emitting Lasers (VCSELs) are important laser sources used for many purposes. However, the applications of these lasers are mainly restricted by their strongly ...

    • PT-axisymmetry for extraordinary field confinement 

      Botey Cumella, Muriel; Ahmed Waseem, Waqas Waseem; Herrero Simon, Ramon; Staliunas, Kestutis (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2017)
      Text en actes de congrés
      Accés obert
      Optical Parity-Time (PT-) symmetric systems support unusual properties when the symmetric coupling between internal modes is broken. We propose a new class of quasiperiodic PT-axisymmetric systems which lead to a simultaneous ...

    • Retrieving linear and nonlinear optical dispersions of matter: combined experiment-numerical ellipsometry in silicon, gold and indium tin oxide 

      Rodríguez Suñé, Laura; Trull Silvestre, José Francisco; Akozbek, Neset; Ceglia, Domenico de; Vincenti, M. A.; Scalora, Michael; Cojocaru, Crina (2021-09-17)
      Article
      Accés obert
      We have presented a combined experimental and numerical method that can be used to predict complex nonlinear dispersion curves in almost any material, based exclusively on the experimental determination of harmonic generation ...

    • Slow light enabled wavelength demultiplexing 

      Hayran, Zeki; Turduev, M.; Botey Cumella, Muriel; Herrero Simon, Ramon; Staliunas, Kestutis; Kurt, H. (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Text en actes de congrés
      Accés obert
      Photonic crystal waveguides supporting band gap guided modes hold great potential to tailor the group velocity of propagating light. We propose and explore different wavelength demultiplexer design approaches that ...

    • Study of the enhancement of absorption in photonic nanostructures 

      Otero Picón, Eva (Universitat Politècnica de Catalunya, 2022-09-09)
      Projecte Final de Màster Oficial
      Accés restringit per acord de confidencialitat

    • Three orders of magnitude enhancement of second and third harmonic generation in the visible and ultraviolet ranges from plasmonic gold nanogratings 

      Mukhopadhyay, Shroddha; Rodríguez Suñé, Laura; Cojocaru, Crina; Vincenti, M. A.; Anson Hallman, Kent; Leo, Giuseppe; Belchovski, Metodi; Ceglia, Domenico de; Scalora, Michael; Trull Silvestre, José Francisco (2023-04-07)
      Article
      Accés obert
      We report experimental observations and numerical simulations of second and third harmonic generation from a gold nanograting, which exhibits a plasmonic resonance in the near infrared. The resonance is tunable, with a ...

    • Tunable wavelength-demultiplexer by tapered photonic crystal waveguide 

      Hayran, Zeki; Turduev, Mirbek; Botey Cumella, Muriel; Herrero Simon, Ramon; Staliunas, Kestutis; Kurt, H. (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Text en actes de congrés
      Accés obert
      We numerically investigate the design of a wavelength de-multiplexer based on a tapered photonic crystal waveguide. The tapered waveguide is generated by reducing the width of the channel which, in turn, provides a gradual ...

    • Ultrasensitive interferometric on-chip microscopy of transparent objects 

      Terborg, Roland A.; Pello, Josselin; Mannelli, Ilaria; Pérez Torres, Juan; Pruneri, Valerio (2016-06)
      Article
      Accés obert
      Light microscopes can detect objects through several physical processes, such as scattering, absorption, and reflection. In transparent objects, these mechanisms are often too weak, and interference effects are more suitable ...