Thermal-dynamical analysis of blister formation in chirped mirror irradiated by single femtosecond lasers.

The laser-induced damage behaviors of chirped mirrors (CMs) are studied by single 800 nm, 38 fs lasers. The CMs provide group delay dispersion of around -60  fs² and average reflectivity of about 99.4% with bandwidth range of 200-300 nm at a central wavelength of 800 nm. Interestingly, a circular blister feature appears in the CMs at a wide range of laser fluence. An optical microscope, atomic force microscope, scanning electron microscope, and surface profiler are applied to describe the blister characteristics. An adiabatic expansion model of ideal gas is adopted to illustrate the formation dynamics of blisters. The evolution of blisters can be explained by partial evaporation of the film and a subsequent gas expansion, driving the bulging of the film stack up to the stress limit, where the blister fractures. According to this model, the energy absorption ratio of blisters increases monotonously with increasing laser fluence before the occurrence of the focal spot confinement effect.

[1]  F. Krausz,et al.  Optical breakdown of multilayer thin-films induced by ultrashort pulses at MHz repetition rates. , 2013, Optics express.

[2]  Jianda Shao,et al.  Ultrashort laser-driven stable-buckling of blisters in chirped mirror , 2013 .

[3]  Matthias Domke,et al.  Laser lift-off initiated by direct induced ablation of different metal thin films with ultra-short laser pulses , 2012 .

[4]  Matthias Domke,et al.  Ultrafast pump-probe microscopy with high temporal dynamic range. , 2012, Optics express.

[5]  Yuan’an Zhao,et al.  Effect of nanosecond laser pre-irradiation on the femtosecond laser-induced damage of Ta2O5/SiO2 high reflector. , 2012, Applied optics.

[6]  Ferenc Krausz,et al.  Investigation of the laser-induced damage of dispersive coatings , 2011, Laser Damage.

[7]  L. Martinu,et al.  Optical and tribomechanical stability of optically variable interference security devices prepared by dual ion beam sputtering. , 2011, Applied optics.

[8]  Myriam Zerrad,et al.  Laser-induced damage of hafnia coatings as a function of pulse duration in the femtosecond to nanosecond range. , 2011, Applied optics.

[9]  Jianda Shao,et al.  Calculation of femtosecond pulse laser induced damage threshold for broadband antireflective microstructure arrays. , 2009, Optics express.

[10]  L. Martinu,et al.  Mechanical and thermoelastic characteristics of optical thin films deposited by dual ion beam sputtering. , 2009, Applied optics.

[11]  U. Heinzmann,et al.  Attosecond metrology , 2007, Nature.

[12]  Alexander V. Tikhonravov,et al.  1.5-octave chirped mirror for pulse compression down to sub-3 fs , 2007 .

[13]  Steven M. Yalisove,et al.  Femtosecond pulsed laser direct write production of nano- and microfluidic channels , 2006 .

[14]  John Nees,et al.  Femtosecond-laser-induced delamination and blister formation in thermal oxide films on silicon (100) , 2006 .

[15]  Günter Steinmeyer,et al.  Generation of sub-4-fs pulses via compression of a white-light continuum using only chirped mirrors , 2006 .

[16]  A. Couairon,et al.  Femtosecond laser-induced damage and filamentary propagation in fused silica. , 2002, Physical review letters.

[17]  Kai Starke,et al.  Laser-induced damage investigation in chirped mirrors for ultrashort-pulse laser systems , 2001, SPIE Laser Damage.

[18]  F. Krausz,et al.  Intense few-cycle laser fields: Frontiers of nonlinear optics , 2000 .

[19]  Kai Starke,et al.  Laser-induced damage threshold of optical components for ultrashort-pulse laser systems , 2000, Laser Damage.

[20]  R. Szipőcs,et al.  Theory and design of chirped dielectric laser mirrors , 1997 .

[21]  R. Szipöcs,et al.  Sub-10-fs mirror-dispersion-controlled Ti:sapphire laser. , 1995, Optics letters.

[22]  R. Mountain,et al.  A technique for the determination of stress in thin films , 1983 .