377 citations · 7.3k across the 173 of their papers we have counts for
5 papers · 2 filters
Optimizing the subwavelength grating of L-band Annular Groove Phase Masks for high coronagraphic performance
Ernesto Vargas Catalan, Elsa Huby, Pontus Forsberg +9
Context. The Annular Groove Phase Mask (AGPM) is one possible implementation of the vector vortex coronagraph, where the helical phase ramp is produced by a concentric subwavelengt…
The QACITS pointing sensor: from theory to on-sky operation on Keck/NIRC2
Elsa Huby, Olivier Absil, Dimitri Mawet +5
Small inner working angle coronagraphs are essential to benefit from the full potential of large and future extremely large ground-based telescopes, especially in the context of th…
Three years of harvest with the vector vortex coronagraph in the thermal infrared
Olivier Absil, Dimitri Mawet, Mikael Karlsson +25
For several years, we have been developing vortex phase masks based on sub-wavelength gratings, known as Annular Groove Phase Masks. Etched onto diamond substrates, these AGPMs are…
Mid-IR AGPMs for ELT applications
Brunella Carlomagno, Christian Delacroix, Olivier Absil +8
The mid-infrared region is well suited for exoplanet detection thanks to the reduced contrast between the planet and its host star with respect to the visible and near-infrared wav…
Low-rank plus sparse decomposition for exoplanet detection in direct-imaging ADI sequences. The LLSG algorithm
C. A. Gomez Gonzalez, O. Absil, P. -A. Absil +3
Data processing constitutes a critical component of high-contrast exoplanet imaging. Its role is almost as important as the choice of a coronagraph or a wavefront control system, a…