30 research outputs found
Dynamics of ripple formation on silicon surfaces by ultrashort laser pulses in sub-ablation conditions
An investigation of ultrashort pulsed laser induced surface modification due
to conditions that result in a superheated melted liquid layer and material
evaporation are considered. To describe the surface modification occurring
after cooling and resolidification of the melted layer and understand the
underlying physical fundamental mechanisms, a unified model is presented to
account for crater and subwavelength ripple formation based on a synergy of
electron excitation and capillary waves solidification. The proposed
theoretical framework aims to address the laser-material interaction in
sub-ablation conditions and thus minimal mass removal in combination with a
hydrodynamics-based scenario of the crater creation and ripple formation
following surface irradiation with single and multiple pulses, respectively.
The development of the periodic structures is attributed to the interference of
the incident wave with a surface plasmon wave. Details of the surface
morphology attained are elaborated as a function of the imposed conditions and
results are tested against experimental data
Physicochemical Characteristics and Droplet Impact Dynamics of Superhydrophobic Carbon Nanotube Arrays
Australian cricketer Archie Jackson, New South Wales, ca. 1925 [picture].
Title devised from accompanying information where available.; Part of the: Fairfax archive of glass plate negatives.; Fairfax number: 2940.; Condition: chipped.; Also available online at: http://nla.gov.au/nla.pic-vn6217342; Acquired from Fairfax Media, 2012
Media 1: Controlling ripples’ periodicity using temporally delayed femtosecond laser double pulses
Originally published in Optics Express on 29 July 2013 (oe-21-15-18501
Media 4: Controlling ripples’ periodicity using temporally delayed femtosecond laser double pulses
Originally published in Optics Express on 29 July 2013 (oe-21-15-18501
Media 3: Controlling ripples’ periodicity using temporally delayed femtosecond laser double pulses
Originally published in Optics Express on 29 July 2013 (oe-21-15-18501
Media 5: Controlling ripples’ periodicity using temporally delayed femtosecond laser double pulses
Originally published in Optics Express on 29 July 2013 (oe-21-15-18501
Media 2: Controlling ripples’ periodicity using temporally delayed femtosecond laser double pulses
Originally published in Optics Express on 29 July 2013 (oe-21-15-18501