Key points are not available for this paper at this time.
The Giant Magellan Telescope's (GMT) high angular resolution and light collecting area are key in enabling its mission to characterize the atmospheres of rocky exoplanets. The high-contrast imaging instrument GMagAO-X will enable high-angular resolution due to its advanced wavefront sensing and control (WFS&C) techniques and coronagraphic imaging capability. However, to support high-fidelity WFS&C many intermediate optics are necessary. For commercially available coatings, the cumulative throughput of GMagAO-X ranges from 5-15%. To enhance the throughput of GMagAO-X we present a design study of customized optical coatings that enable a high broadband throughput. We implement these coatings in a polarization ray trace model of the GMagAO-X optics and investigate whether (chromatic) polarization aberrations are introduced by these coatings. These coating designs will increase the throughput of GMagAO-X significantly and bring the detection of bio-signatures within reach. We will present the results of our coating optimization strategy for high-contrast imaging instruments.
Ashcraft et al. (Mon,) studied this question.