197 citations · 484 across the 11 of their papers we have counts for
11 papers
One- and two-dimensional nuclear magnetic resonance spectroscopy with a diamond quantum sensor
J. M. Boss, K. Chang, J. Armijo +4
We report on Fourier spectroscopy experiments performed with near-surface nitrogen-vacancy centers in a diamond chip. By detecting the free precession of nuclear spins rather than…
Observation of coherent back-scattering and its dynamics in a transverse 2D photonic disorder : from weak to strong localization
Julien Armijo, Raphaël Allio
We report the first observation of coherent back-scattering (CBS) of light in a transverse photonic disorder. The CBS peak is recorded in the far-field, at a fixed propagation time…
Photorefractive writing and probing of anisotropic linear and non-linear lattices
Raphaël Allio, Diego Guzmán-Silva, Camilo Cantillano +5
We study experimentally the writing of one- and two-dimensional photorefractive lattices, focusing on the often overlooked transient regime. Our measurements agree well with theory…
Absolute calibration of the refractive index in photo-induced photonic lattices
Julien Armijo, Raphaël Allio, Cristian Mejía-Cortés
We demonstrate a method to experimentally calibrate the refractive index modulation in photorefractive lattices, a task rarely addressed that is crucial for quantitative comparison…
Analysis of transverse Anderson localization in refractive index structures with customized random potential
Martin Boguslawski, Sebastian Brake, Julien Armijo +3
We present a method to demonstrate Anderson localization in an optically induced randomized potential. By usage of computer controlled spatial light modulators, we are able to impl…
Direct observation of quantum phonon fluctuations in a one dimensional Bose gas
Julien Armijo
We report the first direct observation of collective quantum fluctuations in a continuous field. Shot-to-shot atom number fluctuations in small sub-volumes of a weakly interacting…
Droplet evolution in expanding flow of warm dense matter
Julien Armijo, John J. Barnard
We propose a simple, self-consistent kinetic model for the evolution of a mixture of droplets and vapor expanding adiabatically in vacuum after rapid, almost isochoric heating. We…
Sub-Poissonian fluctuations in a 1D Bose gas: from the quantum quasi-condensate to the strongly interacting regime
Thibaut Jacqmin, Julien Armijo, Tarik Berrada +2
We report on local measurements of atom number fluctuations in slices of a single 1D Bose gas with repulsive interactions. For weakly interacting gases, the fluctuations are super-…
Mapping out the quasi-condensate transition through the 1D-3D dimensional crossover
Julien Armijo, Thibaut Jacqmin, Karen Kheruntsyan +1
By measuring the density fluctuations in a highly elongated weakly interacting Bose gas, we observe and quantify the transition from the ideal gas to a quasi-condensate regime thro…
Probing three-body correlations in a quantum gas using the measurement of the third moment of density fluctuations
Julien Armijo, Thibaut Jacqmin, Karen Kheruntsyan +1
We perform measurements of the third moment of atom number fluctuations in small slices of a very elongated weakly interacting degenerate Bose gas. We find a positive skewness of t…
Thermal properties of AlN-based atom chips
Julien Armijo, Carlos Garrido Alzar, Isabelle Bouchoule
We have studied the thermal properties of atom chips consisting o high thermal conductivity Aluminum Nitride (AlN) substrates on which gold microwires are directly deposited. We ha…