Exciton-seeded multiphoton ionization in bulk<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mtext>SiO</mml:mtext></mml:mrow><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>

Grojo, David; Gertsvolf, Marina; Lei, Shuting; Barillot, T.; Rayner, D. M.; Corkum, P. B.

doi:10.1103/physrevb.81.212301

Cited by 100 publications

(80 citation statements)

References 18 publications

(22 reference statements)

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“…A higher IR fluence provides more avalanche ionization and can re-excite more free electrons from STEs, and therefore, a lower UV threshold is observed. It is found that with a high IR fluence (2.1 J/cm 2 ), the UV damage threshold returns to its normal value at a delay of ~27.3 ps, which is similar to the lifetime of STEs in accordance with previous results [15]. Since damage forms as a combined effect of UV and IR pulses, the damage size is determined by the size of the area where the two beam overlap.…”

Section: Reduction Of Uv Damage Thresholdsupporting

confidence: 71%

Damage formation on fused silica illuminated with ultraviolet-infrared femtosecond pulse pairs

Chang

Corkum

et al. 2015

SPIE Proceedings

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We investigate damage formation on the surface of fused silica by two femtosecond laser pulses, a tightly focused 266 nm (UV) pulse followed by a loosely focused 800 nm (IR) pulse. We show that the damage size is determined by the UV pulse, and only a small fraction of the normal UV damage threshold energy is needed to cause damage when combined with the properly delayed IR pulse. Our results, analyzed with a rate equation model, suggest that the UV pulse generates seed electrons through multiphoton absorption and the IR pulse utilizes these electrons to cause damage by avalanche ionization. By tuning such parameters like pulse energy, time delay, IR pulse duration and polarization, we further demonstrate that damage profile can be controlled.

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Section: Reduction Of Uv Damage Thresholdsupporting

confidence: 71%

Damage formation on fused silica illuminated with ultraviolet-infrared femtosecond pulse pairs

Chang

Corkum

et al. 2015

SPIE Proceedings

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“…We propose that in our experiment a breaking of excitons occurred due to collisions with high energetic electrons within the conduction band. The interpretation is supported by other studies, where it has been shown that excitons, which were formed by low-fluence XUV radiation, can be destroyed by multiphoton absorption of a near-infrared pulse 46 .…”

Section: Resultssupporting

confidence: 76%

Single-shot pulse duration monitor for extreme ultraviolet and X-ray free-electron lasers

et al. 2013

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The resolution of ultrafast studies performed at extreme ultraviolet and X-ray free-electron lasers is still limited by shot-to-shot variations of the temporal pulse characteristics. Here we show a versatile single-shot temporal diagnostic tool that allows the determination of the extreme ultraviolet pulse duration and the relative arrival time with respect to an external pump-probe laser pulse. This method is based on time-resolved optical probing of the transient reflectivity change due to linear absorption of the extreme ultraviolet pulse within a solid material. In this work, we present measurements performed at the FLASH free-electron laser. We determine the pulse duration at two distinct wavelengths, yielding (184 ± 14) fs at 41.5 nm and (21 ± 19) fs at 5.5 nm. Furthermore, we demonstrate the feasibility to operate the tool as an online diagnostic by using a 20-nm-thin Si 3 N 4 membrane as target. Our results are supported by detailed numerical and analytical investigations.

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“…However, the lifetime of exciton-polaritons is limited to a fraction of a picosecond by their phonon assisted relaxation to indirect exciton states decoupled from light. 25 These indirect excitons are essentially immobile. They are easily self-trapped and live for several microseconds or even longer.…”

mentioning

confidence: 99%

Exciton mediated self-organization in glass driven by ultrashort light pulses

et al. 2012

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Local ab initio methods for calculating optical bandgaps in periodic systems. II. Periodic density fitted local configuration interaction singles method for solids J. Chem. Phys. 137, 204119 (2012) Quantum coherence effects in hybrid nanoparticle molecules in the presence of ultra-short dephasing times Appl. Phys. Lett. 101, 213102 (2012) Photoluminescence study of magnetic spin clusters and their temperature evolution in Cd0.70Mn0.30Te spinglass compound J. Appl. Phys. 112, 093715 (2012) Excitonic luminescence in two-dimensionally confined layered sulfide oxides

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Exciton-seeded multiphoton ionization in bulkSiO2

Cited by 100 publications

References 18 publications

Damage formation on fused silica illuminated with ultraviolet-infrared femtosecond pulse pairs

Damage formation on fused silica illuminated with ultraviolet-infrared femtosecond pulse pairs

Single-shot pulse duration monitor for extreme ultraviolet and X-ray free-electron lasers

Exciton mediated self-organization in glass driven by ultrashort light pulses

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