Francesco De Leonardis
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View article: Conservative UTUC treatment using pulsed-thulium YAG laser
Conservative UTUC treatment using pulsed-thulium YAG laser Open
View article: In medio stat virtus: Exploring the potential of the pulsed Tm:YAG laser in the endoscopic management of UTUC
In medio stat virtus: Exploring the potential of the pulsed Tm:YAG laser in the endoscopic management of UTUC Open
View article: A Novel Versatile Electrically Erasable Programmable Read-Only Grating
A Novel Versatile Electrically Erasable Programmable Read-Only Grating Open
View article: Phase-Change-Material-Based True Time-Delay System
Phase-Change-Material-Based True Time-Delay System Open
This study explores the achievement of a tunable true time-delay (TTD) system for a microwave phased-array antenna (MPAA) by incorporating the reversible phase-transition property of phase-change material (PCM) with Bragg gratings (BGs) an…
View article: i-PHAOS: An Overview with an Open-Source Collaborative Database on Miniaturized Integrated Spectrometers
i-PHAOS: An Overview with an Open-Source Collaborative Database on Miniaturized Integrated Spectrometers Open
On-chip spectrometers are increasingly becoming tools that might help in everyday life needs. The possibility offered by several available integration technologies and materials to be used to miniaturize spectrometers has led to a plethora…
View article: i-PHAOS: An Overview with an Open-Source Collaborative Database on Miniaturized Integrated Spectrometers
i-PHAOS: An Overview with an Open-Source Collaborative Database on Miniaturized Integrated Spectrometers Open
On-chip spectrometers are increasingly becoming tools that might help in everyday life needs. The possibility offered by the several available integration technologies and materials to be used to miniaturize spectrometers has led to a plet…
View article: Remote electric powering by germanium photovoltaic conversion of an Erbium-fiber laser beam
Remote electric powering by germanium photovoltaic conversion of an Erbium-fiber laser beam Open
The commercially available 4000-Watt CW Erbium-doped-fiber laser, emitting at the 1567-nm wavelength where the atmosphere has high transmission, provides an opportunity for harvesting electric power at remote “off the grid” locations using…
View article: Remote Electric Powering by Germanium Photovoltaic Conversion of an Erbium-Fiber Laser Beam
Remote Electric Powering by Germanium Photovoltaic Conversion of an Erbium-Fiber Laser Beam Open
The commercially available 4000-Watt continuous-wave Erbium-doped-fiber laser, emitting at the 1567-nanometer wavelength where the atmosphere has high transmission, provides an opportunity for harvesting electric power at remote off the gr…
View article: Compact non-volatile multilevel Sb2Se3 electro-optical switching in the mid-infrared group-IV-photonics platform
Compact non-volatile multilevel Sb2Se3 electro-optical switching in the mid-infrared group-IV-photonics platform Open
This theoretical modeling and simulation paper presents designs and projected performances of two non-volatile, broadband, on-chip 2 × 2 electro-optical switches based upon the germanium-on-insulator (GeOI) photonic-electronic platform ope…
View article: Directed high-energy infrared laser beams for photovoltaic generation of electric power at remote locations
Directed high-energy infrared laser beams for photovoltaic generation of electric power at remote locations Open
Transferring energy without transferring mass is a powerful paradigm to address the challenges faced when the access to, or the deployment of, the infrastructure for energy conversion is locally impossible or impractical. Laser beaming hol…
View article: Directed High-Energy Infrared Laser Beams for Photovoltaic Generation of Electric Power at Remote Locations
Directed High-Energy Infrared Laser Beams for Photovoltaic Generation of Electric Power at Remote Locations Open
Transferring energy without transferring mass is a powerful paradigm to address the challenges faced when the access to, or the deployment of, the infrastructure for energy conversion is locally impossible or impractical. Laser beaming hol…
View article: From the identification of actionable molecular targets to the generation of faithful neuroblastoma patient-derived preclinical models
From the identification of actionable molecular targets to the generation of faithful neuroblastoma patient-derived preclinical models Open
Background Neuroblastoma (NB) represents the most frequent and aggressive form of extracranial solid tumor of infants. Although the overall survival of patients with NB has improved in the last years, more than 50% of high-risk patients st…
View article: Compact Non-Volatile Multilevel Sb$_2$Se$_3$ Electro-Optical Switching in the Mid-Infrared Group-IV-Photonics Platform
Compact Non-Volatile Multilevel Sb$_2$Se$_3$ Electro-Optical Switching in the Mid-Infrared Group-IV-Photonics Platform Open
This theoretical modeling and simulation paper presents designs and projected performances of two non-volatile, broadband, on-chip 2-by-2 electro-optical switches based upon the germanium-on-insulator (GeOI) photonic-electronic platform op…
View article: Dissipative coupling in a Bragg-grating-coupled single resonator with Fano resonance for anti-PT-symmetric gyroscopes
Dissipative coupling in a Bragg-grating-coupled single resonator with Fano resonance for anti-PT-symmetric gyroscopes Open
Anti-parity-time-symmetric Hamiltonians show an enhanced sensitivity to external perturbations that can be used for high-performance angular velocity sensing. Dissipative coupling is a valuable way for realizing anti-PT-symmetric Hamiltoni…
View article: Anti-PT-Symmetric Optical Gyroscope at the Transmission Peak Degeneracy With Enhanced Signal-to-Noise Ratio
Anti-PT-Symmetric Optical Gyroscope at the Transmission Peak Degeneracy With Enhanced Signal-to-Noise Ratio Open
Non-Hermitian sensors have been widely studied for the enhanced response of their eigenvalues in the proximity of exceptional points. However, it has been shown that noise is enhanced in the same way as sensitivity, thus vanishing the adva…
View article: Electric-field-induced quasi-phase-matched three-wave mixing in silicon-based superlattice-on-insulator integrated circuits
Electric-field-induced quasi-phase-matched three-wave mixing in silicon-based superlattice-on-insulator integrated circuits Open
We present a theoretical investigation, based on the tight-binding Hamiltonian, of efficient electric-field-induced three-waves mixing (EFIM) in an undoped lattice-matched short-period superlattice (SL) that integrates quasi-phase-matched …
View article: High-Performance Pockels Effect Modulation and Switching in Silicon-Based GaP/Si, AlP/Si, ZnS/Si, AlN/3C-SiC, GaAs/Ge, ZnSe/GaAs, and ZnSe/Ge Superlattice-On-Insulator Integrated Circuits
High-Performance Pockels Effect Modulation and Switching in Silicon-Based GaP/Si, AlP/Si, ZnS/Si, AlN/3C-SiC, GaAs/Ge, ZnSe/GaAs, and ZnSe/Ge Superlattice-On-Insulator Integrated Circuits Open
We propose new a Si-based waveguided Superlattice-on-Insulator (SLOI) platforms for high-performance electro-optical (EO) 2 × 2 and N × M switching and 1 × 1 modulation, including broad spectrum and resonant. We present a theoretical inves…
View article: Design of a Trap-Assisted Exceptional-Surface- Enhanced Silicon-on-Insulator Particle Sensor
Design of a Trap-Assisted Exceptional-Surface- Enhanced Silicon-on-Insulator Particle Sensor Open
Due to the recent interest in nanoparticles for both new functionalities and health-and-environment risks-related particle emissions of vehicles and industries, integrated-photonic single-particle sensors are urgently required. Exceptional…
View article: Classical and quantum photonic sources based upon a nonlinear GaP/Si-superlattice micro-ring resonator
Classical and quantum photonic sources based upon a nonlinear GaP/Si-superlattice micro-ring resonator Open
We present a theoretical investigation, based on the tight-binding Hamiltonian, of efficient second- and third-order nonlinear optical processes in the lattice-matched undoped (GaP)N/(Si2)M short-period superlattice that is waveguide-integ…
View article: Non-Hermitian Sensing in Photonics and Electronics: A Review
Non-Hermitian Sensing in Photonics and Electronics: A Review Open
Recently, non-Hermitian Hamiltonians have gained a lot of interest, especially in optics and electronics. In particular, the existence of real eigenvalues of non-Hermitian systems has opened a wide set of possibilities, especially, but not…
View article: Compact resonant 2 × 2 crossbar switch using three coupled waveguides with a central nanobeam
Compact resonant 2 × 2 crossbar switch using three coupled waveguides with a central nanobeam Open
This theoretical simulation paper presents designs and projected performance of ∼1550-nm silicon-on-insulator (SOI) and ∼2000-nm Ge-on-Si-on-nitride and Ge-on-nitride 2×2 optical crossbar switches based upon a three-waveguide coupler in wh…
View article: Design of an on-Chip Room Temperature Group-IV Quantum Photonic Chem/Bio Interferometric Sensor Based on Parity Detection
Design of an on-Chip Room Temperature Group-IV Quantum Photonic Chem/Bio Interferometric Sensor Based on Parity Detection Open
We propose and analyze three Si-based room-temperature strip-guided “manufacturable” integrated quantum photonic chem/bio sensor chips operating at wavelengths of 1550 nm, 1330 nm, and 640 nm, respectively. We propose design rules that wil…
View article: Ultrafast electro-optical disk modulators for logic, communications, optical repeaters, and wavelength converters
Ultrafast electro-optical disk modulators for logic, communications, optical repeaters, and wavelength converters Open
We propose a U-shaped pn junction in a silicon-on-insulator microdisk resonator to effectively double the junction–mode overlap in the state-of-the-art, vertical pn junction microdisk electro-optical (EO) modulators. The U-shaped pn juncti…
View article: On-Chip Group-IV Heisenberg-Limited Sagnac Interferometric Gyroscope at Room Temperature
On-Chip Group-IV Heisenberg-Limited Sagnac Interferometric Gyroscope at Room Temperature Open
A room-temperature strip-guided “manufacturable” Silicon-on-Insulator (SOI)/GeSn integrated-photonics quantum-gyroscope chip operating at 1550 nm is proposed and analysed. We demonstrate how the entangled photons generated in Si Spontaneou…
View article: Methane Gas Photonic Sensor Based on Resonant Coupled Cavities
Methane Gas Photonic Sensor Based on Resonant Coupled Cavities Open
In this paper we report methane gas photonic sensors exploiting the principle of absorption-induced redirection of light propagation in coupled resonant cavities. In particular, an example of implemented architecture consists of a Fabry–Pé…
View article: Broadband Electro-Optical Crossbar Switches Using Low-Loss Ge<sub>2</sub>Sb<sub>2</sub>Se<sub>4</sub>Te<sub>1</sub> Phase Change Material
Broadband Electro-Optical Crossbar Switches Using Low-Loss Ge<sub>2</sub>Sb<sub>2</sub>Se<sub>4</sub>Te<sub>1</sub> Phase Change Material Open
This theoretical modeling and simulation paper presents designs and projected performance of non-volatile broadband on-chip 1 × 2 and 2 × 2 electro-optical switches operating in the telecommunication C-band and based on the silicon-on-insu…
View article: Stimulated Brillouin Scattering in an AlGaN Photonics Platform Operating in the Visible Spectral Range
Stimulated Brillouin Scattering in an AlGaN Photonics Platform Operating in the Visible Spectral Range Open
View article: Tunable optical-microwave filters optimized for 100 MHz resolution
Tunable optical-microwave filters optimized for 100 MHz resolution Open
New continuously tunable RF-spectrum analyzers, RF receivers, and RF signal generators are proposed and analyzed for the silicon-on-insulator integrated-photonic platform at the ~1550 nm wavelength. These RF system-on-a-chip applications a…
View article: Reconfigurable optical-microwave filter banks using thermo-optically tuned Bragg Mach-Zehnder devices
Reconfigurable optical-microwave filter banks using thermo-optically tuned Bragg Mach-Zehnder devices Open
A new reconfigurable, tunable on-chip optical filter bank is proposed and analyzed for the silicon-on-insulator platform at the ~1550 nm wavelength. The waveguided bank is a cascade connection of 2 x 2 Mach-Zehnder interferometer (MZI) fil…
View article: Mach-Zehnder crossbar switching and tunable filtering using N-coupled waveguide Bragg resonators
Mach-Zehnder crossbar switching and tunable filtering using N-coupled waveguide Bragg resonators Open
This theoretical modeling-and-simulation paper presents designs and projected performance of ~1500-nm silicon-on-insulator 2 x 2 Mach-Zehnder interferometer (MZI) optical crossbar switches and tunable filters that are actuated by thermo-op…