Exploració per tema "Nanophotonics"
Ara es mostren els items 1-20 de 25
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A bright single photon source: Strong coupling of a single molecule to a plasmonic nano-antenna cavity
(Universitat Politècnica de Catalunya, 2019-07-23)
Projecte Final de Màster Oficial
Accés obertSingle 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 ... -
Angular Radiation Patterns of Nanoantennas: an Optical Yagi-Uda Antenna
(Universitat Politècnica de Catalunya, 2009-09-09)
Projecte Final de Màster Oficial
Accés obertWe address experimentally the radiation patterns of quantum dots coupled to optical nanoantennas at speci c positions. We show that the emission of the coupled system is determined by a variety of resonant and non-resonant ... -
Area and laser power scalability analysis in photonic networks-on-chip
(Institute of Electrical and Electronics Engineers (IEEE), 2013)
Comunicació de congrés
Accés restringit per política de l'editorialIn the last decade, the field of microprocessor architecture has seen the rise of multicore processors, which consist of the interconnection of a set of independent processing units or cores in the same chip. As the number ... -
Biopolymer photonics: from nature to nanotechnology
(2023-08-27)
Article
Accés obertBiopolymers 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
(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
(American Institute of Physics (AIP), 2017-02-14)
Article
Accés obertConfocal 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
(2022-11-03)
Report de recerca
Accés obertWe 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
(MACMILLAN PUBLISHERS LIMITED, 2014-09-17)
Article
Accés obertThe 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 ... -
Large nonlinear efficiency enhancement in the visible and UV range from plasmonic gold nanogratings
(Institute of Electrical and Electronics Engineers (IEEE), 2023)
Text en actes de congrés
Accés restringit per política de l'editorialWe 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
(2023-12-01)
Article
Accés obertNon-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
(Universitat Politècnica de Catalunya, 2020-10-19)
Projecte Final de Màster Oficial
Accés restringit per acord de confidencialitat -
Optical nanoantenna optimization for local field enhancement at visible wavelengths
(Universitat Politècnica de Catalunya, 2009-07-20)
Projecte Final de Màster Oficial
Accés obertDipole nanoantennas are studied by means of numerical calculations, over a broad frequency range (250-600 THz), in order to evaluate the benefits of its integration in NSOM microscopy systems. Operational wavelength, ... -
Optomechanics in hybrid optical/electrical traps
(Universitat Politècnica de Catalunya, 2018-09-06)
Projecte Final de Màster Oficial
Accés restringit per decisió de l'autorControlling the motion of particles is of paramount importance in levitated optomechanics, since sensing and macroscopic quantum experiments require very stable conditions. This Master Thesis explores the position stabilization ... -
PT-axisymmetric photonic nanostructures
(2016)
Text en actes de congrés
Accés restringit per política de l'editorialOptical 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
(Institute of Electrical and Electronics Engineers (IEEE), 2017)
Text en actes de congrés
Accés obertSemiconductor 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
(International Society for Photo-Optical Instrumentation Engineers (SPIE), 2017)
Text en actes de congrés
Accés obertOptical 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
(2021-09-17)
Article
Accés obertWe 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 ... -
Shortening of the photoluminescence lifetime of PbS quantum dots coupled to gold nanoantennas
(Universitat Politècnica de Catalunya, 2014-09-10)
Projecte Final de Màster Oficial
Accés restringit per decisió de l'autor[ANGLÈS] In this study we studied single PbS quantum dots (QDs) that are emitting in the visible range, 800-900 nm. We report a reduction of 20 % of the luminescence lifetime of these single PbS QDs when they are in the ... -
Slow light enabled wavelength demultiplexing
(Institute of Electrical and Electronics Engineers (IEEE), 2016)
Text en actes de congrés
Accés obertPhotonic 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 ... -
Stabilization of Broad Area Semiconductor Laser Sources
(Institute of Electrical and Electronics Engineers (IEEE), 2018)
Text en actes de congrés
Accés obertWe numerically proof the stabilization of broad area semiconductor laser sources by introducing simultaneous in-phase two-dimensional modulations on the refractive index and on the pump (gain). We also examine the interplay ...
