In recent years, vortex beams with orbital angular momentum (OAM) have attracted more
and more attention. The wavefront of the OAM beams is helical, the intensity at the center of …

Interest in the multiple facets of optical vortices has flourished in the last three decades. This
review examines the basic research and applications of the interplay between optical …

High-contrast adaptive optics (AO) imaging is a powerful technique to probe the
architectures of planetary systems from the outside-in and survey the atmospheres of self …

In this paper, we review the impact of small sample statistics on detection thresholds and
corresponding confidence levels (CLs) in high-contrast imaging at small angles. When …

Abstract The Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) instrument is a
multipurpose high-contrast imaging platform designed for the discovery and detailed …

Kerr black holes are among the most intriguing predictions of Einstein's general relativity
theory,. These rotating massive astrophysical objects drag and intermix their surrounding …

The experimental evidence that radio techniques can be used for synthesizing and
analyzing non-integer electromagnetic (EM) orbital angular momentum (OAM) of radiation is …

A direct image of an exoplanet system is a snapshot of the planets and disk around a central
star. We can estimate the orbit of a planet from a time series of images, and we can estimate …

We obtained spectra in the wavelength range λ= 995–1769 nm of all four known planets
orbiting the star HR 8799. Using the suite of instrumentation known as Project 1640 on the …

Small-angle coronagraphy is technically and scientifically appealing because it enables the
use of smaller telescopes, allows covering wider wavelength ranges, and potentially …