Broadband nano-focusing of high-order harmonics in soft X-ray region with ellipsoidal mirror
作者： H. Motoyama , A. Iwasaki , Y. Takei , T. Kume , S. Egawa
DOI: 10.1063/1.5091587
关键词:
摘要: We demonstrate broadband focusing of multiple high-order harmonics intense femtosecond laser pulses using an ellipsoidal mirror. The mirror, with a high numerical aperture and highly accurate surface, was fabricated replication process. in the wavelength range between 10 20 nm were focused to nearly diffraction-limited size 350 × 380 nm2. According Rayleigh's quarter criteria, wavefront aberration beam estimated be less than 5 nm, which corresponds temporal dispersion 16 as. developed system is suited for producing attosecond field negligible aberration, nonlinear light-matter interactions time domain can explored.We explored.
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