Jorge O. Parra
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View article: Polarization-Insensitive Silicon Grating Couplers via Subwavelength Metamaterials and Metaheuristic Optimization
Polarization-Insensitive Silicon Grating Couplers via Subwavelength Metamaterials and Metaheuristic Optimization Open
Silicon photonics is the leading platform in photonic integrated circuits (PICs), enabling dense integration and low-cost manufacturing for applications such as data communications, artificial intelligence, and quantum processing, to name …
View article: Sub-milliwatt threshold power and tunable-bias all-optical nonlinear activation function using vanadium dioxide for wavelength-division multiplexing photonic neural networks
Sub-milliwatt threshold power and tunable-bias all-optical nonlinear activation function using vanadium dioxide for wavelength-division multiplexing photonic neural networks Open
The increasing demand for efficient hardware in neural computation highlights the limitations of electronic-based systems in terms of speed, energy efficiency, and scalability. Wavelength-division multiplexing (WDM) photonic neural network…
View article: Local Tuning of the Epsilon‐Near‐Zero Condition in Hybrid Silicon Waveguides Using Reactive Laser Annealing
Local Tuning of the Epsilon‐Near‐Zero Condition in Hybrid Silicon Waveguides Using Reactive Laser Annealing Open
The ability for locally tuning devices in photonic integrated circuits could be an essential function for a wide range of applications requiring reconfigurable photonics. This work demonstrates the application of postgrowth reactive laser …
View article: Adapting to climate change: lessons from Chile’s coastal communities
Adapting to climate change: lessons from Chile’s coastal communities Open
Purpose This study aims to examine the intricate relationship between Chile’s coastal communities and the increasing effects of climate change, with a focus on Caleta Lenga as a case study. Chile’s extensive coastline is closely linked to …
View article: Nonvolatile reconfigurable polarization rotator at datacom wavelengths based on a Sb<sub>2</sub>Se<sub>3</sub>/Si waveguide
Nonvolatile reconfigurable polarization rotator at datacom wavelengths based on a Sb<sub>2</sub>Se<sub>3</sub>/Si waveguide Open
Silicon photonics has become a key platform for photonic integrated circuits (PICs) due to its high refractive index and compatibility with complementary metal-oxide-semiconductor manufacturing. However, the inherent birefringence in silic…
View article: Ultra-high endurance silicon photonic memory using vanadium dioxide
Ultra-high endurance silicon photonic memory using vanadium dioxide Open
Silicon photonics arises as a viable solution to address the stringent resource demands of emergent technologies, such as neural networks. Within this framework, photonic memories are fundamental building blocks of photonic integrated circ…
View article: On-chip electro-optical spiking VO <sub>2</sub> /Si device with an inhibitory leaky integrate-and-fire response
On-chip electro-optical spiking VO <sub>2</sub> /Si device with an inhibitory leaky integrate-and-fire response Open
Integrated photonic neuromorphic computing has emerged as an appealing technology to replicate human brain functionalities by leveraging the benefits of integrated photonics. In this context, spiking neural networks (SNNs) offer a highly e…
View article: On-chip electro-optical spiking VO₂/Si device with an inhibitory leaky integrate-and-fire response
On-chip electro-optical spiking VO₂/Si device with an inhibitory leaky integrate-and-fire response Open
Integrated photonic neuromorphic computing has emerged as an appealing technology to replicate human brain functionalities by leveraging the benefits of integrated photonics. In this context, spiking neural networks (SNNs) offer a highly e…
View article: On-chip electro-optical spiking VO₂/Si device with an inhibitory leaky integrate-and-fire response
On-chip electro-optical spiking VO₂/Si device with an inhibitory leaky integrate-and-fire response Open
Integrated photonic neuromorphic computing has emerged as an appealing technology to replicate human brain functionalities by leveraging the benefits of integrated photonics. In this context, spiking neural networks (SNNs) offer a highly e…
View article: Sub-milliwatt threshold power and tunable-bias all-optical nonlinear activation function using vanadium dioxide for wavelength-division multiplexing photonic neural networks
Sub-milliwatt threshold power and tunable-bias all-optical nonlinear activation function using vanadium dioxide for wavelength-division multiplexing photonic neural networks Open
The increasing demand for efficient hardware in neural computation highlights the limitations of electronic-based systems in terms of speed, energy efficiency, and scalability. Wavelength-division multiplexing (WDM) photonic neural network…
View article: Nonvolatile reconfigurable polarization rotator at datacom wavelengths based on a Sb2Se3/Si waveguide
Nonvolatile reconfigurable polarization rotator at datacom wavelengths based on a Sb2Se3/Si waveguide Open
Silicon photonics has become a key platform for photonic integrated circuits (PICs) due to its high refractive index and compatibility with complementary metal-oxide-semiconductor manufacturing. However, the inherent birefringence in silic…
View article: Silicon thermo-optic phase shifters: a review of configurations and optimization strategies
Silicon thermo-optic phase shifters: a review of configurations and optimization strategies Open
Silicon photonics (SiPh) has emerged as the predominant platform across a wide range of integrated photonics applications, encompassing not only mainstream fields such as optical communications and microwave signal processing but also burg…
View article: Ultra-high endurance silicon photonic memory using vanadium dioxide
Ultra-high endurance silicon photonic memory using vanadium dioxide Open
Silicon photonics arises as a viable solution to address the stringent resource demands of emergent technologies, such as neural networks. Within this framework, photonic memories are fundamental building blocks of photonic integrated circ…
View article: Enhanced BaTiO<sub>3</sub>/Si<sub>3</sub>N<sub>4</sub> integrated photonic platform with VO<sub>2</sub> technology for large-scale neuromorphic computing [Invited]
Enhanced BaTiO<sub>3</sub>/Si<sub>3</sub>N<sub>4</sub> integrated photonic platform with VO<sub>2</sub> technology for large-scale neuromorphic computing [Invited] Open
The hybrid barium titanate (BaTiO 3 or BTO) – silicon nitride (Si 3 N 4 or SiN) platform integrated on silicon has been established as a promising candidate for implementing photonic integrated circuits with unique features in terms of hig…
View article: Complex-valued trainable activation function hardware using a TCO/silicon modulator
Complex-valued trainable activation function hardware using a TCO/silicon modulator Open
Artificial neural network-based electro-optic chipsets constitute a very promising platform because of its remarkable energy efficiency, dense wavelength parallelization possibilities and ultrafast modulation speeds, which can accelerate c…
View article: Reversible rigid coupling apparatus and method for borehole seismic transducers
Reversible rigid coupling apparatus and method for borehole seismic transducers Open
An apparatus and method of high resolution reverse vertical seismic profile (VSP) measurements is shown. By encapsulating the seismic detector and heaters in a meltable substance (such as wax), the seismic detector can be removably secured…
View article: High-efficiency grating coupler for an ultralow-loss Si<sub>3</sub>N<sub>4</sub>-based platform
High-efficiency grating coupler for an ultralow-loss Si<sub>3</sub>N<sub>4</sub>-based platform Open
Integrated silicon nitride waveguides of 100 nm height can achieve ultralow propagation losses below 0.1 dB/cm at the 1550 nm wavelength band but lack the scattering strength to form efficient grating couplers. An enhanced grating coupler …
View article: Ultrafast all-optical phase switching enabled by epsilon-near-zero materials in silicon
Ultrafast all-optical phase switching enabled by epsilon-near-zero materials in silicon Open
Transparent conducting oxides (TCOs) have emerged as both particularly appealing epsilon-near-zero (ENZ) materials and remarkable candidates for the design and fabrication of active silicon nanophotonic devices. However, the leverage of TC…
View article: Dataset: Impact of GST thickness on GST-loaded silicon waveguides for optimal optical switching
Dataset: Impact of GST thickness on GST-loaded silicon waveguides for optimal optical switching Open
The following files provide the dataset of the work "Impact of GST thickness on GST-loaded silicon waveguides for optimal optical switching". The description and organization of the files are explained in the file README.txt.
View article: Dataset: Impact of GST thickness on GST-loaded silicon waveguides for optimal optical switching
Dataset: Impact of GST thickness on GST-loaded silicon waveguides for optimal optical switching Open
The following files provide the dataset of the work "Impact of GST thickness on GST-loaded silicon waveguides for optimal optical switching". The description and organization of the files are explained in the file README.txt.
View article: Dataset: Impact of GST thickness on GST-loaded silicon waveguides for optimal optical switching
Dataset: Impact of GST thickness on GST-loaded silicon waveguides for optimal optical switching Open
The following files provide the dataset of the work "Impact of GST thickness on GST-loaded silicon waveguides for optimal optical switching". The description and organization of the files are explained in the file README.txt.
View article: Low-threshold power and tunable integrated optical limiter based on an ultracompact VO2/Si waveguide
Low-threshold power and tunable integrated optical limiter based on an ultracompact VO2/Si waveguide Open
Optical limiters are nonlinear devices that encompass applications from device protection to activation functionalities in neural networks. In this work, we report an optical limiter on silicon photonics based on an ultracompact VO2/Si wav…
View article: Toward Nonvolatile Switching in Silicon Photonic Devices
Toward Nonvolatile Switching in Silicon Photonic Devices Open
Nonvolatile switching is still a missing functionality in current mainstream silicon photonics complementary metal‐oxide‐semiconductor platforms. Fundamentally, nonvolatile switching stands for the ability to switch between two or more pho…
View article: Non-Volatile Photonic Memory Based on a SAHAS Configuration
Non-Volatile Photonic Memory Based on a SAHAS Configuration Open
[EN] The non-volatile memory is a crucial functionality for a wide range of applications in photonic integrated circuits, however, it still poses a challenge in silicon photonic technology. This problem has been overcome in the microelectr…
View article: All-Optical Hybrid VO$_{2}$/Si Waveguide Absorption Switch at Telecommunication Wavelengths
All-Optical Hybrid VO$_{2}$/Si Waveguide Absorption Switch at Telecommunication Wavelengths Open
[EN] Vanadium dioxide (VO2) is one of the most promising materials for developing hybrid photonic integrated circuits (PICs). At telecommunication wavelengths, VO2 exhibits a large change on the refractive index (¿n ~ 1 and ¿¿ ~ 2.5) betwe…
View article: VO2 nanophotonics
VO2 nanophotonics Open
The intriguing physics of vanadium dioxide (VO2) makes it not only a fascinating object of study for fundamental research on solid-state physics but also an attractive means to actively modify the properties of integrated devices. In parti…
View article: Temporal dynamics of all-optical switching in hybrid VO2/Si waveguides
Temporal dynamics of all-optical switching in hybrid VO2/Si waveguides Open
Vanadium dioxide (VO2) is one of the most promising materials for developing hybrid photonic integrated devices (PICs). However, despite switching times as low as a few femtoseconds have been reported, the all-optical temporal dynamics of …
View article: Ultra-low loss hybrid ITO/Si thermo-optic phase shifter with optimized power consumption
Ultra-low loss hybrid ITO/Si thermo-optic phase shifter with optimized power consumption Open
Typically, materials with large optical losses such as metals are used as microheaters for silicon based thermo-optic phase shifters. Consequently, the heater must be placed far from the waveguide, which could come at the expense of the ph…