Development of high-throughput, high-damage-threshold beam separator for 13 nm high-order harmonics

Optics Letters
Yutaka NagataKatsumi Midorikawa

Abstract

We demonstrate a high-throughput, high-damage-threshold beam separator for wavelengths shorter than 30 nm, which uses a 10 nm thick niobium nitrogen film prepared on a Si substrate, set at the Brewster angle relative to the pump wavelength. The film was deposited by rf reactive magnetron sputtering on a Si substrate. The beam separator has an attenuation ratio of 0.01 and a damage-threshold intensity of at least 0.8 TW/cm2 for a 26 fs pump pulse. The measured reflectivity of the beam separator exceeded 70% in a wavelength range of 13-18 nm. This broadband beam separator may be used to eliminate energetic laser pulses from longitudinally pumped x ray lasers as well as from high-order harmonics.

References

Sep 6, 2003·Optics Letters·Pascal MercèreSenajith Rekawa
Dec 4, 2004·Nature·Taro SekikawaShuntaro Watanabe

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Citations

May 3, 2008·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Fabio FrassettoLuca Poletto

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