Ultra-low noise meta-mirrors with optical losses below 500 ppm Johannes Dickmann, Liam Shelling Neto, Mika Gaedtke, Steffen Sauer, Daniele Nicolodi, Uwe Sterr and Stefanie Kroker EPJ Web Conf., 287 (2023) 04019 Published online: 18 October 2023 DOI: 10.1051/epjconf/202328704019