Daniel Dolfi
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View article: Quantum transport signature of strain-induced scalar and pseudo-vector potentials in a crenellated hBN-graphene heterostructure
Quantum transport signature of strain-induced scalar and pseudo-vector potentials in a crenellated hBN-graphene heterostructure Open
The sharp Dirac cone of the electronic dispersion confers to graphene a remarkable sensitivity to strain. It is usually encoded in scalar and pseudo-vector potentials, induced by the modification of hopping parameters, which have given ris…
View article: Optomechanical Gigahertz Oscillator made of a Two Photon Absorption free piezoelectric III/V semiconductor
Optomechanical Gigahertz Oscillator made of a Two Photon Absorption free piezoelectric III/V semiconductor Open
Oscillators in the GHz frequency range are key building blocks for telecommunication, timing and positioning applications. Operating directly in the GHz and compactness while keeping high frequency stability, is still an up-to-date challen…
View article: Ramsey CPT Signal Generation with a Miniature Clock Bench and a Dual-Frequency Optical Generator
Ramsey CPT Signal Generation with a Miniature Clock Bench and a Dual-Frequency Optical Generator Open
We demonstrate, for the first time, Ramsey CPT spectroscopy with a miniature electro-optical bench associated to a dual-frequency generator based on combined optical injection locking and optical phase locking techniques Preliminary result…
View article: Ramsey CPT Signal Generation with a Miniature Clock Bench and a Dual-Frequency Optical Generator
Ramsey CPT Signal Generation with a Miniature Clock Bench and a Dual-Frequency Optical Generator Open
International audience
View article: Laser power stabilization of a compact dual-frequency VECSEL for a cesium clock optical bench
Laser power stabilization of a compact dual-frequency VECSEL for a cesium clock optical bench Open
International audience
View article: High Rejection and Frequency Agile Optical Filtering of RF Signals Using a Rare Earth Ion-Doped Crystal
High Rejection and Frequency Agile Optical Filtering of RF Signals Using a Rare Earth Ion-Doped Crystal Open
International audience
View article: Laser Intensity and Frequency Stabilization Implemented on a Miniature CPT Clock Breadboard
Laser Intensity and Frequency Stabilization Implemented on a Miniature CPT Clock Breadboard Open
International audience
View article: Relaxation mechanism of GaP grown on 001 Si substrates: influence of defects on the growth of AlGaP layers on GaP/Si templates
Relaxation mechanism of GaP grown on 001 Si substrates: influence of defects on the growth of AlGaP layers on GaP/Si templates Open
The mechanical stability of commercial GaP/Si templates during thermal an-nealing and subsequent MOCVD growth of GaP and AlGaP is investigated.Although the GaP layer of the template originally presents an excellent surfacemorphology, annea…
View article: All-optical coherent pulse compression for dynamic laser ranging using an acousto-optic dual comb
All-optical coherent pulse compression for dynamic laser ranging using an acousto-optic dual comb Open
We demonstrate a new and simple dynamic laser ranging platform based on analog all-optical coherent pulse compression of modulated optical waveforms. The technique employs a bidirectional acousto-optic frequency shifting loop, which provid…
View article: Data for the article "Ultrafast spin-currents and charge conversion at 3d-5d interfaces probed by time-domain terahertz spectroscopy"
Data for the article "Ultrafast spin-currents and charge conversion at 3d-5d interfaces probed by time-domain terahertz spectroscopy" Open
Data for the article "Ultrafast spin-currents and charge conversion at 3d-5d interfaces probed by time-domain terahertz spectroscopy" (Ultrafast spin-currents and charge conversion at 3d-5d interfaces probed by time-domain terahertz spectr…
View article: Data for the article "Ultrafast spin-currents and charge conversion at 3d-5d interfaces probed by time-domain terahertz spectroscopy"
Data for the article "Ultrafast spin-currents and charge conversion at 3d-5d interfaces probed by time-domain terahertz spectroscopy" Open
Data for the article "Ultrafast spin-currents and charge conversion at 3d-5d interfaces probed by time-domain terahertz spectroscopy" (Ultrafast spin-currents and charge conversion at 3d-5d interfaces probed by time-domain terahertz spectr…
View article: Phase Noise of Optical Pulse Trains Generated by Talbot Effect in Frequency Shifting Loops
Phase Noise of Optical Pulse Trains Generated by Talbot Effect in Frequency Shifting Loops Open
International audience
View article: Telecom wavelength optical processor for wideband spectral analysis of radiofrequency signals
Telecom wavelength optical processor for wideband spectral analysis of radiofrequency signals Open
International audience
View article: Optomechanical gigahertz oscillator made of a two photon absorption free piezoelectric III/V semiconductor
Optomechanical gigahertz oscillator made of a two photon absorption free piezoelectric III/V semiconductor Open
Oscillators in the gigahertz frequency range are key building blocks for telecommunication and positioning applications. Operating directly in the gigahertz while keeping high frequency stability and compactness is still an up-to-date chal…
View article: Building blocks and concepts for THz remote sensing and communications
Building blocks and concepts for THz remote sensing and communications Open
International audience
View article: Rate equation reformulation including coherent excitation: application to periodic protocols based on spectral hole-burning
Rate equation reformulation including coherent excitation: application to periodic protocols based on spectral hole-burning Open
A large number of signal-processing protocols are based on recording a spectral pattern via spectral hole-burning in an inhomogeneously broadened absorption profile. We present a simulation method specifically designed for periodic excitat…
View article: VSPIN: a new model relying on the vectorial description of the laser field for predicting the polarization dynamics of spin-injected V(e)CSELs
VSPIN: a new model relying on the vectorial description of the laser field for predicting the polarization dynamics of spin-injected V(e)CSELs Open
A new vectorial model (VSPIN) based on the Jones formalism is proposed to describe the polarization dynamics of spin injected V(e)CSELs. This general modelling framework accounts for spin injection effects as a gain circular dichroism in t…
View article: Bases and experimental validation of a novel VSPIN model: towards functional spin-controlled VCSELs
Bases and experimental validation of a novel VSPIN model: towards functional spin-controlled VCSELs Open
International audience
View article: Broadband Tunable Hybrid Photonic Crystal-Nanowire Light Emitter
Broadband Tunable Hybrid Photonic Crystal-Nanowire Light Emitter Open
We integrate about 100 single Cadmium Selenide semiconductor nanowires in self-standing Silicon Nitride photonic crystal cavities in a single processing run. Room temperature measurements reveal a single narrow emission linewidth, correspo…
View article: Phase modulation detection with liquid crystal light valve and digital holography
Phase modulation detection with liquid crystal light valve and digital holography Open
Self-adaptive interferometry allows the measurement of small optical phase modulations in noisy environments and with strongly distorted optical wavefronts. We review two techniques of self-adaptive interferometers based on liquid crystals…
View article: Measuring the nonlinear refractive index of graphene using the optical Kerr effect method
Measuring the nonlinear refractive index of graphene using the optical Kerr effect method Open
© 2016 Optical Society of America.By means of the ultrafast optical Kerr effect method coupled to optical heterodyne detection (OHD-OKE), we characterize the third-order nonlinear response of graphene and compare it to experimental values …
View article: Thirty Gigahertz Optoelectronic Mixing in Chemical Vapor Deposited Graphene
Thirty Gigahertz Optoelectronic Mixing in Chemical Vapor Deposited Graphene Open
© 2016 American Chemical Society. The remarkable properties of graphene, such as broadband optical absorption, high carrier mobility, and short photogenerated carrier lifetime, are particularly attractive for high-frequency optoelectronic …
View article: Microwave Photonics for Signal Generation and Processing in RF Systems
Microwave Photonics for Signal Generation and Processing in RF Systems Open
We will review recent implementations of microwave photonics technology into RF systems which illustrate how this technology is now clearly a key enabler to further improve systems performances and to implement new functions. Development o…
View article: 30 GHz optoelectronic mixing in CVD graphene
30 GHz optoelectronic mixing in CVD graphene Open
We report an optoelectronic mixer based on chemical vapour-deposited graphene. Our device consists in a coplanar waveguide that integrates a graphene channel, passivated with an atomic layer-deposited Al2O3 film. With this new structure, 3…
View article: Accurate measurement of the residual birefringence in VECSEL: Towards understanding of the polarization behavior under spin-polarized pumping
Accurate measurement of the residual birefringence in VECSEL: Towards understanding of the polarization behavior under spin-polarized pumping Open
In this paper we report birefringence measurements of an optically pumped (100)-oriented InGaAs/GaAsP multiple quantum well (MQWs) Vertical External Cavity Surface Emitting Laser (VECSEL) in oscillating conditions. The proposed technique r…
View article: Evaluation of the noise properties of a dual-frequency VECSEL for compact Cs atomic clocks
Evaluation of the noise properties of a dual-frequency VECSEL for compact Cs atomic clocks Open
We evaluate a dual-frequency and dual-polarization optically-pumped semiconductor laser emitting at 852 nm as a new laser source for compact atomic clocks based on the coherent population trapping (CPT) technique.The frequency difference b…
View article: Dual-frequency VECSEL for atomic clocks using coherent population trapping
Dual-frequency VECSEL for atomic clocks using coherent population trapping Open
Workshop on Laser Diodes for Space Applications, Nov 2015, Palaiseau, France