Time-compensated extreme-UV and soft x-ray monochromator for ultrashort high-order harmonic pulses

The optical design of a time-compensated monochromator for high-order harmonic pulses in the extreme-UV (EUV) and soft x-ray regions is presented. The system consists of two grazing-incidence mirrors used as collimating and refocusing elements and two multilayer normal-incidence plane mirrors illuminated in parallel light that rotate along a vertical axis parallel to their planes to select the wavelength, and remain parallel to guarantee the constant direction of the exit beam: this is performed by rotating and translating, at the same time, one of the two mirrors along an axis parallel to the exit direction. The system has constant exit direction in the whole working spectral region. The pulse time duration is not altered up to few femtoseconds. A system operating in the 9-32 nm region is described.

[1]  Bruzzese,et al.  Spectral features and modeling of high-order harmonics generated by sub-10-fs pulses , 2000, Physical review letters.

[2]  Christoph H. Keitel,et al.  Atomic physics with super-high intensity lasers , 1997 .

[3]  Troy W. Barbee,et al.  Multilayer Optics for the Soft X-Ray and Extreme Ultraviolet , 1990 .

[4]  P. Corkum,et al.  Plasma perspective on strong field multiphoton ionization. , 1993, Physical review letters.

[5]  T. Barbee,et al.  Molybdenum-silicon multilayer mirrors for the extreme ultraviolet. , 1985, Applied optics.

[6]  W. Hunter,et al.  Long-term stability of a Mo/Si multilayer structure. , 1993, Applied optics.

[7]  E Spiller,et al.  Fabrication and testing of large area multilayer coated x-ray optics. , 1989, Applied optics.

[8]  P. Villoresi,et al.  Tunable soft-x-ray radiation by high-order harmonic generation , 1999 .

[9]  E. Knystautas,et al.  C/Si multilayer mirrors for the 25-30-nm wavelength region. , 1997, Applied optics.

[10]  W. Hunter,et al.  Higher-order suppression in an on-blaze plane-gratng monochromator. , 1984, Applied optics.

[11]  Giampiero Naletto,et al.  Grazing-incidence flat-field spectrometer for high-order harmonic diagnostics , 2001 .

[12]  Miyazaki,et al.  High-order harmonic generation in the tunneling regime. , 1995, Physical review. A, Atomic, molecular, and optical physics.

[13]  P Villoresi,et al.  Compensation of optical path lengths in extreme-ultraviolet and soft-x-ray monochromators for ultrafast pulses. , 1999, Applied optics.

[14]  Eberhard Spiller,et al.  Soft-x-ray optics , 1994, Optical Society of America Annual Meeting.

[15]  Giampiero Naletto,et al.  Optical design of a grazing incidence spectrometer/monochromater with varied line-space flat grating for high-order harmonic diagnostic , 1999, Optics & Photonics.

[16]  P. Villoresi,et al.  Nonadiabatic three-dimensional model of high-order harmonic generation in the few-optical-cycle regime , 2000 .

[17]  R. Stuik,et al.  Reflectivity of Mo/Si multilayer systems for EUVL , 1999, Advanced Lithography.

[18]  William Ralph Hunter,et al.  Grating-crystal monochromator for the spectral range 5 eV to 5 keV (A) , 1982 .