Abstract

This study considers the reflective characteristics of three-component Si/Al/Sc multilayer mirrors with a ${\rm MoSi}_2$ protective cap layer as candidates for telescopes for observation of the solar corona in the He I ($\lambda = 58.4\;{\rm nm}$) spectral line. At 58.4 nm, a peak reflectance of 32% and a spectral width at a half-maximum intensity of $\Delta \lambda = 5.4\;{\rm nm}$ are obtained. The temporal stability of the reflectance at $\lambda = 58.4\;{\rm nm}$ for Si/Al/Sc samples with a 6 nm thick ${\rm MoSi}_2$ cap layer is investigated during storage in air for 20 months.

© 2020 Optical Society of America

Stable high-reflection Be/Mg multilayer mirrors for solar astronomy at 30.4 nm

Vladimir N. Polkovnikov, Nikolai I. Chkhalo, Roman S. Pleshkov, Nikolai N. Salashchenko, Franz Schäfers, Mewael G. Sertsu, Andrey Sokolov, Mikhail V. Svechnikov, and Sergei Yu. Zuev
Opt. Lett. 44(2) 263-266 (2019)

High efficiency Al/Sc-based multilayer coatings in the EUV wavelength range above 40 nanometers

Jennifer Rebellato, Regina Soufli, Evgueni Meltchakov, Eric Gullikson, Sébastien de Rossi, and Franck Delmotte
Opt. Lett. 45(4) 869-872 (2020)

Highly reflective Ru/Sr multilayer mirrors for wavelengths 9–12 nm

R. A. Shaposhnikov, V. N. Polkovnikov, N. N. Salashchenko, N. I. Chkhalo, and S. Yu. Zuev
Opt. Lett. 47(17) 4351-4354 (2022)

Be/Si/Al multilayer mirrors as the most promising optical elements for spectroscopy and imaging in the spectral region of 17–32 nm

R. S. Pleshkov, N. I. Chkhalo, K. V. Durov, V. N. Polkovnikov, R. A. Shaposhnikov, R. M. Smertin, and S. Yu. Zuev
Opt. Lett. 48(20) 5301-5304 (2023)

Laser induced damage in coatings for cryogenic Yb:YAG active mirror amplifiers

Hanchen Wang, Alexander R. Meadows, Elzbieta Jankowska, Emmett Randel, Brendan A. Reagan, Jorge J. Rocca, and Carmen S. Menoni
Opt. Lett. 45(16) 4476-4479 (2020)