EUV multilayer optics for space science and ultrafast science

Abstract

In this paper, we present a brief history of EUV multilayer mirrors and recent results achieved at Institut d'Optique in the fields of space science and ultra-fast pulses. Concerning space science, we present two solutions to improve reflectivity of EUV multilayer for solar imaging: three material multilayers and Al-based multilayers. Concerning attosecond pulses, we demonstrate the possibility to realize multilayer mirrors for an efficient transport of high harmonics on a broad energy band with high efficiency.

Single and multi-channel Al-based multilayer systems for space applications in EUV range

“…1,2 In recent years, the use of multilayer mirrors for the EUV and soft x-ray ranges is rapidly expanding at synchrotron radiation and free-electron laser facilities, in high-order harmonic generation techniques, and particularly in the solar imaging instruments of space missions. 3 The solar EUV radiation consists of multiple emission lines originated from electronic transitions between various levels corresponding to different ionization states of elements presented in the solar atmosphere. 4 These states are characteristic to the temperature of solar plasma, therefore a possibility to collect the data on the intensity variation of specific EUV emission lines would provide important information on phenomena occurring in inner and outer regions of the solar atmosphere: chromosphere, transition region, corona and heliosphere.…”