The full optical control of light using sustainable green technologies is one the incipient challenges Photonics community. There are, however, few materials able to provide a significant nonlinear refractive index change under small enough intensities (< 1 GW cm−2), and, more importantly, allowing external magnitude and sign their response. This manuscript demonstrates that Cs2SnI6 lead-free n...

The vast majority of binaries containing a compact object and regular star spend most their time in quiescent state where no strong interactions occur between components. Detection these is extremely challenging only few candidates have been detected through optical spectroscopy. Self-lensing represents new means detecting objects binaries, gravitational lensing the light from visible component...