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| 1 | Slow light bimodal interferometry in onedimensional photonic crystal waveguides显示文摘Strongly influenced by the advances in the semiconductor industry,the miniaturization and integration of optical circuits into smaller devices has stimulated considerable research efforts in recent decades.Among other structures,integrated interferometers play a prominent role in the development of photonic devices for on-chip applications ranging from optical communication networks to point-of-care analysis instruments.However,it has been a longstanding challenge to design extremely short interferometer schemes,as long interaction lengths are typically required for a complete modulation transition.Several approaches,including novel materials or sophisticated configurations,have been proposed to overcome some of these size limitations but at the expense of increasing fabrication complexity and cost.Here,we demonstrate for the first time slow light bimodal interferometric behaviour in an integrated single-channel one-dimensional photonic crystal.The proposed structure supports two electromagnetic modes of the same polarization that exhibit a large group velocity difference.Specifically,an over 20-fold reduction in the higher-order-mode group velocity is experimentally shown on a straightforward all-dielectric bimodal structure,leading to a remarkable optical path reduction compared to other conventional interferometers.Moreover,we experimentally demonstrate the significant performance improvement provided by the proposed bimodal photonic crystal interferometer in the creation of an ultra-compact optical modulator and a highly sensitive photonic sensor. | Luis Torrijos-Morán Amadeu Griol Jaime García-Rupérez | 2021 | Light(Science & Applications)2021，10，2： | 3 |
| 2 | On-chip wireless silicon photonics: from reconfigurable interconnects to lab-on-chip devices显示文摘Photonic integrated circuits are developing as key enabling components for high-performance computing and advanced networkon-chip,as well as other emerging technologies such as lab-on-chip sensors,with relevant applications in areas from medicine and biotechnology to aerospace.These demanding applications will require novel features,such as dynamically reconfigurable light pathways,obtained by properly harnessing on-chip optical radiation.In this paper,we introduce a broadband,high directivity(4150),low loss and reconfigurable silicon photonics nanoantenna that fully enables on-chip radiation control.We propose the use of these nanoantennas as versatile building blocks to develop wireless(unguided)silicon photonic devices,which considerably enhance the range of achievable integrated photonic functionalities.As examples of applications,we demonstrate 160 Gbit s−1 data transmission over mm-scale wireless interconnects,a compact low-crosstalk 12-port crossing and electrically reconfigurable pathways via optical beam steering.Moreover,the realization of a flow micro-cytometer for particle characterization demonstrates the smart system integration potential of our approach as lab-on-chip devices. | Carlos García-Meca Sergio Lechago Antoine Brimont Amadeu Griol Sara Mas Luis Sánchez Laurent Bellieres Nuria S Losilla Javier Martí | 2017 | Light(Science & Applications)2017，6，1： | 3 |
| 3 | Vertical multiple-slot waveguide ring resonators in silicon nitride显示文摘 | Vivien L Marris-Morini D Griol A | 2008 | Optics Express2008，16，17： | 1 |
| 4 | Maeh Zehnder interferometer employing coupled-resonator optical waveguides显示文摘 | MARTINEZ A GRIOL A SANCHIS P | 2003 | Opt Lett2003，28，： | 1 |
| 5 | Microstrip multistage coupled ring bandpass filters using spurlind filters for harmonic suppression显示文摘 | Griol A Marti J Sempere L | 2001 | Electron Lett2001，37，9： | 1 |
| 6 | 查看详情显示文摘 | Barrios C A Gylfason K B Sanchez B Griol A Sohlstrom H Holgado M Casquel R | | 0，，： | 1 |
| 7 | Microstrip multistage coupled ring bandpass filters using spur-line filters for harmonic suppression 显示文摘 | GRIOL A MARTI J SEMPERE L | 2001 | Electronics Letters2001，37，9： | 1 |
| 8 | Mach-Zehnder intetferometer employing coupled-resonator optical waveguides 显示文摘 | MARTINEZ A GRIOL A SANCHIS P | 2003 | Opt lett2003，28，： | 1 |
| 9 | Microstrip multistage coupled ring active bandpass filters with harmonic suppression显示文摘 | GRIOL A MARTI J | 1999 | 35:575-5771999，35，： | 1 |
| 10 | Microstrip side-coupled ring bandpass filters with mode coupling control for harmonic suppression显示文摘 | GRIOL A MIRA D MARTI J | 2004 | Electronics Letters2004，40，： | 1 |
| 11 | Mach-Zehnder interferometer employing coupled-resonator optical waveguides显示文摘 | MARTINEZ A GRIOL A SANCHIS P | 2003 | Opt Lett2003，28，6： | 1 |
| 12 | A Non-Destructive Time Series Model for the Estimation of Cherry Coffee Production显示文摘Coffee plays a key role in the generation of rural employment in Colombia.More than 785,000 workers are directly employed in this activity,which represents the 26%of all jobs in the agricultural sector.Colombian coffee growers estimate the production of cherry coffee with the main aim of planning the required activities,and resources(number of workers,required infrastructures),anticipating negotiations,estimating,price,and foreseeing losses of coffee production in a specific territory.These important processes can be affected by several factors that are not easy to predict(e.g.,weather variability,diseases,or plagues.).In this paper,we propose a non-destructive time series model,based on weather and crop management information,that estimate coffee production allowing coffee growers to improve their management of agricultural activities such as flowering calendars,harvesting seasons,definition of irrigation methods,nutrition calendars,and programming the times of concentration of production to define the amount of personnel needed for harvesting.The combination of time series and machine learning algorithms based on regression trees(XGBOOST,TR and RF)provides very positive results for the test dataset collected in real conditions for more than a year.The best results were obtained by the XGBOOST model(MAE=0.03;RMSE=0.01),and a difference of approximately 0.57%absolute to the main harvest of 2018. | Jhonn Pablo Rodríguez David Griol Zoraida Callejas Juan Carlos Corrales | 2022 | Computers, Materials & Continua2022，，3： | 0 |
| 13 | Radiationless anapole states in on-chip photonics显示文摘High-index nanoparticles are known to support radiationless states called anapoles,where dipolar and toroidal moments interfere to inhibit scattering to the far field.In order to exploit the striking properties arising from these interference conditions in photonic integrated circuits,the particles must be driven in-plane via integrated waveguides.Here,we address the excitation of electric anapole states in silicon disks when excited on-chip at telecom wavelengths.In contrast to normal illumination,we find that the anapole condition-identified by a strong reduction of the scattering-does not overlap with the near-field energy maximum,an observation attributed to retardation effects.We experimentally verify the two distinct spectral regions in individual disks illuminated in-plane from closely placed waveguide terminations via far-field and near-field measurements.Our finding has important consequences concerning the use of anapole states and interference effects of other Mie-type resonances in high-index nanoparticles for building complex photonic integrated circuitry. | Evelyn Diaz-Escobar Thomas Bauer Elena Pinilla-Cienfuegos Angela I.Barreda Amadeu Griol L.Kuipers Alejandro Martinez | 2021 | Light(Science & Applications)2021，10，11： | 0 |
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