NDLI: Dynamics of phase transitions induced by femtosecond laser pulse irradiation of indium phosphide

Content Provider	Springer Nature Link
Author	Bonse, J. Wiggins, S.M. Solis, J.
Copyright Year	2004
Abstract	The structural transformation dynamics of single-crystalline indium phosphide (InP) irradiated with 150 fs laser pulses at 800 nm has been investigated by means of time-resolved reflectivity measurements covering a time window from 150 fs up to 500 ns. The results obtained show that for fluences above a threshold of 0.16 J/cm2 thermal melting of the material occurs on the timescale of 1–2 ps. The evolution of the reflectivity on a longer timescale reveals the reflectivity of the liquid phase and shows resolidification times typically around 10–30 ns after which an amorphous layer several tens of nanometers thick is formed on the surface. This amorphous layer significantly alters the optical properties of the surface and finally leads to a reduced ablation threshold for subsequent laser pulses. Single-pulse ablation at higher fluences (>0.23 J/cm2) is preceded by an ultrafast phase transition (non-thermal melting) occurring within 400 fs after the arrival of the pulse to the surface.
Starting Page	243
Ending Page	248
Page Count	6
File Format	PDF
ISSN	09478396
Journal	Applied Physics A
Volume Number	80
Issue Number	2
e-ISSN	14320630
Language	English
Publisher	Springer-Verlag
Publisher Date	2004-09-30
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Optical and Electronic Materials Nanotechnology Characterization and Evaluation Materials Surfaces and Interfaces, Thin Films Condensed Matter Operating Procedures, Materials Treatment
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Science

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