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Your search keyword '"Valnir C. S. Junior"' showing total 4 results
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4 results on '"Valnir C. S. Junior"'

1. Integrated Photonic Platform for Robust Differential Refractive Index Sensor

Author

Andre L. Moras, Valnir C. S. Junior, Mario C. M. M. Souza, Giuseppe A. Cirino, Antonio A. G. Von Zuben, Luis A. M. Barea, and Newton C. Frateschi

Subjects
Optical sensing and sensors, Sensor, Integrated optics devices, Applied optics. Photonics, TA1501-1820, Optics. Light, QC350-467
Abstract

We demonstrate an integrated photonic platform comprising a refractive index (RI) sensor based on Photonic Molecule (PM) that effectively mitigates the influence of environmental perturbations using a differential measurement scheme while providing high quality-factor (Q) resonances. The RI sensor consists of a partially unclad microdisk resonator coupled to an external clad microring resonator fabricated on silicon-on-insulator (SOI) platform. We report a RI sensitivity of 24 nm/RIU, achieving a limit of detection (LOD) of 1.7 × 10-3 refractive index units (RIU) with improved stability for an operation range of 0.15 RIU in a compact footprint of 40 × 40 μm2, representing an important solution for real-life applications in which measurement conditions are not easily controllable.

Published
2020
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3. Integrated Photonic Platform for Robust Differential Refractive Index Sensor

Author

Newton C. Frateschi, Andre L. Moras, Luis A. M. Barea, Valnir C. S. Junior, Mario C. M. M. Souza, Antonio A. G. von Zuben, and Giuseppe A. Cirino

Subjects
lcsh:Applied optics. Photonics, Materials science, Silicon on insulator, Integrated optics devices, 02 engineering and technology, 01 natural sciences, Temperature measurement, 010309 optics, Resonator, 0103 physical sciences, lcsh:QC350-467, Optical sensing and sensors, Electrical and Electronic Engineering, Sensor, business.industry, lcsh:TA1501-1820, 021001 nanoscience & nanotechnology, Atomic and Molecular Physics, and Optics, Differential measurement, Optoelectronics, Photonics, 0210 nano-technology, business, Sensitivity (electronics), Refractive index, lcsh:Optics. Light
Abstract

We demonstrate an integrated photonic platform comprising a refractive index (RI) sensor based on Photonic Molecule (PM) that effectively mitigates the influence of environmental perturbations using a differential measurement scheme while providing high quality-factor (Q) resonances. The RI sensor consists of a partially unclad microdisk resonator coupled to an external clad microring resonator fabricated on silicon-on-insulator (SOI) platform. We report a RI sensitivity of 24 nm/RIU, achieving a limit of detection (LOD) of 1.7 × 10-3 refractive index units (RIU) with improved stability for an operation range of 0.15 RIU in a compact footprint of 40 × 40 μm2, representing an important solution for real-life applications in which measurement conditions are not easily controllable.

Published
2020
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4. Silicon nitride photonic molecules for robust sensing applications

Author

Andre L. Moras, Gabriel R. da Ascenção, Newton C. Frateschi, Marcus V. A. Pires, Luis A. M. Barea, and Valnir C. S. Junior

Subjects
Materials science, business.industry, Sensing applications, Finite-difference time-domain method, Physics::Optics, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, 010309 optics, chemistry.chemical_compound, Silicon nitride, chemistry, 0103 physical sciences, Optoelectronics, Molecule, Thermal stability, Sensitivity (control systems), Photonics, 0210 nano-technology, business, Refractive index
Abstract

We propose a compact Si3N4 Photonic Molecule for robust and differential measurements in sensing applications. The simulations show that a refractive index sensitivity of 131.3 nm/RIU with high thermal stability can be achieved.

Published
2020
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