J. Lapointe
YOU?
Author Swipe
View article: Planar waveguide circulating Gaussian beam resonators on a silicon photonic chip
Planar waveguide circulating Gaussian beam resonators on a silicon photonic chip Open
A silicon (Si) slab waveguide resonator design with a circulating Gaussian-like cavity mode is described and characterized, for both all-pass and add-drop configurations and several different input/output coupling strengths. The circulatin…
View article: Quantum Emission in Monolayer WSe2 Transferred onto InP Nanowires
Quantum Emission in Monolayer WSe2 Transferred onto InP Nanowires Open
Localized quantum emitters in transition-metal dichalcogenides (TMDs) have recently emerged as solid-state candidates for on-demand sources of single photons. Due to the role of strain in the site-selective creation of TMD emitters, their …
View article: Planar Waveguide Circulating Gaussian Beam Resonators on a Silicon Photonic Chip
Planar Waveguide Circulating Gaussian Beam Resonators on a Silicon Photonic Chip Open
A Si slab waveguide resonator design with a circulating Gaussian-like cavity mode is described and characterized, for both all-pass and add-drop configurations and several different input/output coupling strengths. The circulating beam pro…
View article: Exploring Quantum Emission in Bilayer WSe<sub>2</sub>: Strain Effects from Nanopillars
Exploring Quantum Emission in Bilayer WSe<sub>2</sub>: Strain Effects from Nanopillars Open
2D semiconductors subject to localized strain represent an emerging, scalable platform for the generation of bright single‐photon emitters. In this study, the observation of quantum emission from bilayer (BL) WSe 2 under varying 3D strain …
View article: On-demand single photon emission in the telecom C-band from nanowire-based quantum dots
On-demand single photon emission in the telecom C-band from nanowire-based quantum dots Open
Single photon sources operating on-demand at telecom wavelengths are required in fiber-based quantum secure communication technologies. In this work we demonstrate single photon emission from position-controlled nanowire quantum dots emitt…
View article: Anomalous conductance quantization of a one-dimensional channel in monolayer WSe2
Anomalous conductance quantization of a one-dimensional channel in monolayer WSe2 Open
Among quantum devices based on 2D materials, gate-defined quantum confined 1D channels are much less explored, especially in the high-mobility regime where many-body interactions play an important role. We present the results of measuremen…
View article: Anomalous conductance quantization of a one-dimensional channel in monolayer WSe2
Anomalous conductance quantization of a one-dimensional channel in monolayer WSe2 Open
Among quantum devices based on 2D materials, gate-defined quantum confined 1D channels are much less explored, especially in the high mobility regime where many body interactions play an important role. We present results of measurements a…
View article: Approaching transform-limited photons from nanowire quantum dots excited above-band
Approaching transform-limited photons from nanowire quantum dots excited above-band Open
We demonstrate that, even when employing above-band excitation, photons emitted from semiconductor quantum dots can have linewidths that approach their transform-limited values. This is accomplished by using quantum dots embedded in bottom…
View article: Unity yield of deterministically positioned quantum dot single photon sources
Unity yield of deterministically positioned quantum dot single photon sources Open
We report on a platform for the production of single photon devices with a fabrication yield of 100%. The sources are based on InAsP quantum dots embedded within position-controlled bottom-up InP nanowires. Using optimized growth condition…
View article: Charge detection using a WSe$_2$ van der Waals heterostructure
Charge detection using a WSe$_2$ van der Waals heterostructure Open
Detecting single charging events in quantum devices is an important step towards realizing practical quantum circuits for quantum information processing. In this work, we demonstrate that van derWaals heterostructure devices with gated nan…
View article: Optical fibre-based single photon source using InAsP quantum dot nanowires and gradient-index lens collection
Optical fibre-based single photon source using InAsP quantum dot nanowires and gradient-index lens collection Open
We present a compact, fibre-coupled single photon source using gradient-index (GRIN) lenses and an InAsP semiconductor quantum dot embedded within an InP photonic nanowire waveguide. A GRIN lens assembly is used to collect photons close to…
View article: Unity Yield of Deterministically Positioned Quantum Dot Single Photon Sources
Unity Yield of Deterministically Positioned Quantum Dot Single Photon Sources Open
We report on a platform for the production of single photon devices with a fabrication yield of 100%. The sources are based on InAsP quantum dots embedded within position-controlled bottom-up InP nanowires. Using optimized growth condition…
View article: Unity yield of deterministically positioned quantum dot single photon sources
Unity yield of deterministically positioned quantum dot single photon sources Open
We report on a platform for the production of single photon devices with a fabrication yield of 100%. The sources are based on InAsP quantum dots embedded within position-controlled bottom-up InP nanowires. Using optimized growth condition…
View article: Optical fibre-based (plug-and-play) single photon source using InAsP quantum dot nanowires and gradient-index lens collection
Optical fibre-based (plug-and-play) single photon source using InAsP quantum dot nanowires and gradient-index lens collection Open
We present a compact, fibre-coupled single photon source using gradient-index (GRIN) lenses and an InAsP semiconductor quantum dot embedded within an InP photonic nanowire waveguide. A GRIN lens assembly is used to collect photons close to…
View article: Isolator-Free Integration of C-Band InAs-InP Quantum Dash Buried Heterostructure Lasers with Silicon Waveguides
Isolator-Free Integration of C-Band InAs-InP Quantum Dash Buried Heterostructure Lasers with Silicon Waveguides Open
An InAs-on-InP quantum dash buried heterostructure laser and silicon chip optimized for mutual integration by direct facet-to-facet coupling have achieved -1.2 dB coupling efficiency, with coupled laser RIN of -150 dB/Hz and 152 kHz linewi…
View article: Empirical model for the temperature dependence of silicon refractive index from O to C band based on waveguide measurements
Empirical model for the temperature dependence of silicon refractive index from O to C band based on waveguide measurements Open
An accurate model for the silicon refractive index including its temperature and wavelength dependence is critically important for many disciplines of science and technology. Currently, such a model for temperatures above 22°C in the optic…
View article: Compact and Low Crosstalk Echelle Grating Demultiplexer on Silicon-On-Insulator Technology
Compact and Low Crosstalk Echelle Grating Demultiplexer on Silicon-On-Insulator Technology Open
We report on the design of an ultra-compact integrated wavelength demultiplexer in echelle configuration for the optical O-band realized on silicon-on-insulator technology. The device has four channels with channel spacing of 800 GHz and a…
View article: Theory and experiments of coherent photon coupling in semiconductor nanowire waveguides with quantum dot molecules
Theory and experiments of coherent photon coupling in semiconductor nanowire waveguides with quantum dot molecules Open
We present a quantum optics theory, numerical calculations, and experiments\non coupled quantumdots in semiconductor nanowire waveguides. We first present\nan analytical Green function theory tocompute the emitted spectra of two\ncoupled q…
View article: Bright Single InAsP Quantum Dots at Telecom Wavelengths in Position-Controlled InP Nanowires: The Role of the Photonic Waveguide
Bright Single InAsP Quantum Dots at Telecom Wavelengths in Position-Controlled InP Nanowires: The Role of the Photonic Waveguide Open
We report on the site-selected growth of bright single InAsP quantum dots embedded within InP photonic nanowire waveguides emitting at telecom wavelengths. We demonstrate a dramatic dependence of the emission rate on both the emission wave…
View article: Fiber-chip surface grating couplers engineered by nanophotonic sub-wavelength grating metamaterials
Fiber-chip surface grating couplers engineered by nanophotonic sub-wavelength grating metamaterials Open
International audience
View article: High-efficiency single etch step surface grating couplers engineered by subwavelength structured metamaterials
High-efficiency single etch step surface grating couplers engineered by subwavelength structured metamaterials Open
International audience
View article: Single-etch subwavelength engineered fiber-chip grating couplers for 13 µm datacom wavelength band
Single-etch subwavelength engineered fiber-chip grating couplers for 13 µm datacom wavelength band Open
We report, for the first time, on the design and experimental demonstration of fiber-chip surface grating couplers based on subwavelength grating engineered nanostructure operating in the low fiber chromatic dispersion window (around 1.3 μ…
View article: Overcoming power broadening of the quantum dot emission in a pure wurtzite nanowire
Overcoming power broadening of the quantum dot emission in a pure wurtzite nanowire Open
One of the key challenges in developing quantum networks is to generate single photons with high brightness, purity, and long temporal coherence. Semiconductor quantum dots potentially satisfy these requirements; however, due to imperfecti…
View article: High-Efficiency Fiber-Chip Surface Grating Couplers
High-Efficiency Fiber-Chip Surface Grating Couplers Open
— We report our latest advances in development of high-efficiency fiber-chip surface grating couplers with refractive index engineered subwavelength structures. We present different experimental demonstrations of high-performance grating-c…