Amadeu Griol

Universitat Politècnica de València

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Alejandro Martı́nez

University of Central Florida

113

Daniel Navarro‐Urrios

Universitat de Barcelona

C. M. Sotomayor Torres

Institut Català de Nanociència i Nanotecnologia

Pablo Sanchis

Universitat Politècnica de València

J. Martí

University of Minnesota

N. E. Capuj

Universidad de La Laguna

Martín F. Colombano

Laboratoire Matériaux et Phénomènes Quantiques

Laura Mercadé

Universitat Politècnica de València

Laurent Bellières

Universitat Politècnica de València

Guillermo Arregui

Technical University of Denmark

Cooperative Institutions

Universitat Politècnica de València

130

Centre National de la Recherche Scientifique

Universitat de València

Consejo Superior de Investigaciones Científicas

Institut des Nanotechnologies de Lyon

Université Claude Bernard Lyon 1

École Centrale de Lyon

Universidad Autónoma de Madrid

Institut Català de Nanociència i Nanotecnologia

Universidad Politécnica de Madrid

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

A highly integrated optical sensor for point of care label free identification of pathogenic bacteria strains and their antibiotic resistance

Daniel Hill V. Toccafondo Jaime García‐Rupérez Amadeu Griol Javier García-Castelló

A highly integrated optical sensor for point of care label free identification of pathogenic bacteria strains and their antibiotic resistance

Pathogenic bacteria

Identification

Point of care

Source

Cite

Citations (0)

Nonlinear dynamics and chaos in an optomechanical beam

Nature Communications (2017)

Daniel Navarro‐Urrios N. E. Capuj Martín F. Colombano P. D. García Marianna Sledzinska

Abstract Optical nonlinearities, such as thermo-optic mechanisms and free-carrier dispersion, are often considered unwelcome effects in silicon-based resonators and, more specifically, optomechanical cavities, since they affect, for instance, the relative detuning between an optical resonance and the excitation laser. Here, we exploit these nonlinearities and their intercoupling with the mechanical degrees of freedom of a silicon optomechanical nanobeam to unveil a rich set of fundamentally different complex dynamics. By smoothly changing the parameters of the excitation laser we demonstrate accurate control to activate two- and four-dimensional limit cycles, a period-doubling route and a six-dimensional chaos. In addition, by scanning the laser parameters in opposite senses we demonstrate bistability and hysteresis between two- and four-dimensional limit cycles, between different coherent mechanical states and between four-dimensional limit cycles and chaos. Our findings open new routes towards exploiting silicon-based optomechanical photonic crystals as a versatile building block to be used in neurocomputational networks and for chaos-based applications.

Bistability

Optical Bistability

Biophotonics

Optical chaos

10.1038/ncomms14965

Cite

Citations (102)

Electrical switching in hybrid VO<inf>2</inf>/Si photonic structures

Luis Sánchez Álvaro Rosa T. Angelova Juan Hurtado Amadeu Griol

The integration of active materials on silicon is emerging as a promising field in silicon photonics to improve the performance metrics of key photonic components, in particular active components. Active materials allow tuning their optical properties as function of external stimuli. Amongst them, vanadium dioxide (VO 2 ) has been largely investigated for different applications due to its controllable change between an insulating and a metallic phase. For photonic applications, VO 2 shows a promising performance due to the abrupt change in the refractive index between the two phases across the semiconductor to metal transition (SMT). In this work, we will present our recent results for enabling disruptive electrical switching performance in hybrid VO 2 /Si photonic structures. Results have been obtained in the framework of the FP7-ICT-2013-11-61456 SITOGA project.

Vanadium dioxide

10.1109/icton.2016.7550465

Cite

Citations (1)

Silicon 2×2 optical switch based on optimized multimode interference coupler to minimize power consumption

Álvaro Rosa Amadeu Griol Ana M. Gutierrez A. Brimont Pablo Sanchis

Optical switches based on multimode interference (MMI) couplers can reduce footprint and increase tolerance against fabrication deviations. Furthermore, a 50% power consumption reduction has been demonstrated by designing a trenched MMI for thermal isolation without penalizing insertion losses and crosstalk.

Crosstalk

Optical cross-connect

Footprint

10.1109/ecoc.2015.7341729

Cite

Citations (3)

Recent advances in hybrid VO₂/Si devices for enabling electro-optical functionalities

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE (2017)

Pablo Sanchis Luis Sánchez T. Angelova Amadeu Griol Mariela Menghini

The change in the optical properties of VO₂ across its insulator to metal to transition could give rise to novel photonic devices with beyond state-of-the art performance in terms of footprint, power consumption and speed operation. However, the final performance strongly depends on the control and efficiency of the phase transition in the VO₂. For electro-optical applications, such control and efficiency is highly dependent on the electrode configuration. In this work, the influence of the electrodes is experimentally analyzed and an alternative approach is proposed to switch the VO₂ to the metallic state by minimizing the electrical power consumption. The electro-optical performance of the proposed short-circuited electrode is also experimentally demonstrated. An extinction ratio of 12 dB is achieved with a 20μm long hybrid VO₂/Si waveguide with an electrical power of only 11mW. The power consumption could be further reduced by decreasing the distance between the electrode and the silicon waveguide, which in this work has been fixed to 1.5μm, without affecting the optical losses.

Waveguide

Extinction ratio

Optical power

10.1117/12.2253865

Cite

Citations (1)

Point-of-Care and Label-Free Detection of Porcine Reproductive and Respiratory Syndrome and Swine Influenza Viruses Using a Microfluidic Device with Photonic Integrated Circuits

Viruses (2022)

Georgios Manessis Maciej Frant Grzegorz Woźniakowski Lapo Nannucci Martina Benedetti

Swine viral diseases challenge the sector’s sustainability by affecting productivity and the health and welfare of the animals. The lack of antiviral drugs and/or effective vaccines renders early and reliable diagnosis the basis of viral disease management, underlining the importance of point-of-care (POC) diagnostics. A novel POC diagnostic device utilizing photonic integrated circuits (PICs), microfluidics, and information and communication technologies for the detection of porcine reproductive and respiratory syndrome virus (PRRSV) and swine influenza A (SIV) was validated using spiked and clinical oral fluid samples. Metrics including sensitivity, specificity, accuracy, precision, positive likelihood ratio (PLR), negative likelihood ratio (NLR), and diagnostic odds ratio (DOR) were calculated to assess the performance of the device. For PRRSV, the device achieved a sensitivity of 83.5%, specificity of 77.8%, and DOR values of 17.66, whereas the values for SIV were 81.8%, 82.2%, and 20.81, respectively. The POC device and PICs can be used for the detection of PRRSV and SIV in the field, paving the way for the introduction of novel technologies in the field of animal POC diagnostics to further optimize livestock biosecurity.

10.3390/v14050988

Cite

Citations (2)

Strong magnetic resonance of coupled aluminum nanodisks on top of a silicon waveguide

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE (2012)

Irene Alepuz Carlos García‐Meca Francisco J. Rodríguez‐Fortuño R. Ortuño M. Lorente-Crespo

We study the electromagnetic behavior of a structure consisting of coupled aluminum nanodisks on a silicon waveguide at telecom wavelengths. Numerical simulations show that the fundamental TE-like waveguide mode excites a localized magnetic plasmon resonance between adjacent nanodisks with suitable dimensions, leading to transmission dips. For a sufficient number of disks (periodically distributed along the propagation direction), the structure supports a magnetic mode arising from a magneto-inductive coupling between neighboring nanodisks, as revealed by an Eigenmode analysis. The transmission response of the samples was measured for both polarizations through an end-fire set-up, confirming that the strong resonances are only present for TE polarization. Measurements and simulations are in good agreement, showing that the resonances strength is maximized for three coupled nanodisks.

Waveguide

Inductive coupling

10.1117/12.922300

Cite

Citations (12)

Synthesis and Raman Detection of 5-Amino-2-mercaptobenzimidazole Self-Assembled Monolayers in Nanoparticle-on-a-Mirror Plasmonic Cavity Driven by Dielectric Waveguides

Nano Letters (2024)

Javier Redolat María Camarena-Pérez Amadeu Griol Miguel Sinusía Lozano Maria Isabel Gómez-Gómez

Functionalization of metallic surfaces by molecular monolayers is a key process in fields such as nanophotonics or biotechnology. To strongly enhance light–matter interaction in such monolayers, nanoparticle-on-a-mirror (NPoM) cavities can be formed by placing metal nanoparticles on such chemically functionalized metallic monolayers. In this work, we present a novel functionalization process of gold surfaces using 5-amino-2-mercaptobenzimidazole (5-A-2MBI) molecules, which can be used for upconversion from THz to visible frequencies. The synthesized surfaces and NPoM cavities are characterized by Raman spectroscopy, atomic force microscopy (AFM), and advancing–receding contact angle measurements. Moreover, we show that NPoM cavities can be efficiently integrated on a silicon-based photonic chip performing pump injection and Raman-signal extraction via silicon nitride waveguides. Our results open the way for the use of 5-A-2MBI monolayers in different applications, showing that NPoM cavities can be effectively integrated with photonic waveguides, enabling on-chip enhanced Raman spectroscopy or detection of infrared and THz radiation.

Surface Modification

Nanophotonics

Self-assembled monolayer

10.1021/acs.nanolett.3c04932

Cite

Citations (1)

Optical Up/Down-conversion of OFDM Wireless Signals based on Ultracompact Silicon Optomechanical Cavities

Optical Fiber Communication Conference (OFC) 2022 (2021)

Laura Mercadé María Morant Amadeu Griol Roberto Llorente Alejandro Martı́nez

We demonstrate all-optical up- and down-conversion of IEEE 802.16 WiMAX OFDM signals using an ultracompact silicon optomechanical crystal cavity operated in the phonon lasing regime at 4 GHz.

WiMAX

10.1364/ofc.2021.tu5f.6

Cite

Citations (0)

Polarization-Insensitive Integration of Nanoparticle-on-a-Slit Cavities with Dielectric Waveguides for On-chip Surface Enhanced Raman Spectroscopy

arXiv (Cornell University) (2024)

Javier Redolat Daniel Arenas-Ortega Ángela Barreda Amadeu Griol Elena Pinilla‐Cienfuegos

Amongst the available plasmonic nanostructures, nanoparticle-on-a-mirror (NPoM) cavities - consisting of metal nanoparticles separated from a metal mirror by a molecular-size monolayer - provide the ultimate light confinement in gaps even below 1 nm. A variation of the NPoM cavity is the nanoparticle-on-a-slit (NPoS) configuration, where the nanoparticle is placed on a functionalized narrow slit created on a metal plate so that there are two nanometric-scale gaps for plasmonic localization. Interestingly, the NPoS cavity can also perform as a dual dipole antenna to localize both infrared and visible light, which is useful in molecular optomechanics. For many applications, it is desirable to integrate such cavities on a chip and provide access to (and collection from) the hot spots via photonic integrated waveguides. In this work, we propose, design, and experimentally demonstrate the efficient integration of NPoS plasmonic cavities with dielectric waveguides on a silicon-based chip. To this end, we use silicon-nitride slot waveguides and show that both the fundamental TE and TM modes can be used to drive the cavity, making our device polarization-independent. We demonstrate our concept by performing surface-enhanced Raman spectroscopy of BPT molecules on a chip fabricated by standard silicon fabrication tools mixed with the deterministic positioning of gold nanospheres on the gap of a plasmonic dipole antenna.

Slit

Surface-Enhanced Raman Spectroscopy

10.48550/arxiv.2410.16183

Cite

Citations (0)