scholarly journals High acoustic strains in Si through ultrafast laser excitation of Ti thin-film transducers

2015 ◽  
Vol 23 (13) ◽  
pp. 17191 ◽  
Author(s):  
Eirini Tzianaki ◽  
Makis Bakarezos ◽  
George D. Tsibidis ◽  
Yannis Orphanos ◽  
Panagiotis A. Loukakos ◽  
...  
Keyword(s):  
Thin Film ◽  
Laser Excitation ◽  
Ultrafast Laser

From Semiconductor to Metal in a Flash: Observing Ultrafast Laser-Induced Phase Transformations

1997 ◽  
Vol 481 ◽  
Author(s):  
J. P. Callan ◽  
A. M.-T. Kim ◽  
L. Huangt ◽  
E. N. Glezer ◽  
E. Mazur
Keyword(s):  
Phase Transformations ◽  
Dielectric Function ◽  
Spectral Range ◽  
Laser Excitation ◽  
Spectroscopic Technique ◽  
Ultrafast Laser ◽  
Lattice Heating ◽  
Fs Laser

ABSTRACTWe use a new broadband spectroscopic technique to measure ultrafast changes in the dielectric function of a material over the spectral range 1.5–3.5 eV following intense 70-fs laser excitation. The results reveal the nature of the phase transformations which occur in the material following excitation. We studied the response of GaAs and Si. For GaAs, there are three distinct regimes of behavior as the pump fluence is increased — lattice heating, lattice disordering, and a semiconductor-to-metal transition.

scholarly journals Ruthenium under ultrafast laser excitation: Model and dataset for equation of state, conductivity, and electron-ion coupling

Data in Brief ◽  
2020 ◽  
Vol 28 ◽  
pp. 104980 ◽  
Author(s):  
Yu. Petrov ◽  
K. Migdal ◽  
N. Inogamov ◽  
V. Khokhlov ◽  
D. Ilnitsky ◽  
...  
Keyword(s):  
Equation Of State ◽  
Laser Excitation ◽  
Ultrafast Laser ◽  
Excitation Model

Effect of the hot electron blast force on ultrafast laser ablation of nickel thin film

2015 ◽  
Vol 54 (7) ◽  
pp. 1737 ◽  
Author(s):  
Yonggang Shen ◽  
Yong Gan ◽  
Wanjun Qi ◽  
Yaogen Shen ◽  
Zhen Chen
Keyword(s):  
Thin Film ◽  
Laser Ablation ◽  
Ultrafast Laser ◽  
Hot Electron ◽  
Ultrafast Laser Ablation

Study of dynamic space charge in SrS:Ce thin-film electroluminescent devices by tunable laser excitation

1997 ◽  
Vol 71 (13) ◽  
pp. 1819-1821 ◽  
Author(s):  
Manuela Peter ◽  
Yukinori Kashio ◽  
Satoru Nishimura ◽  
Koutoku Ohmi ◽  
Shosaku Tanaka ◽  
...  
Keyword(s):  
Thin Film ◽  
Space Charge ◽  
Laser Excitation ◽  
Tunable Laser ◽  
Electroluminescent Devices

Ultrafast laser excitation and rotational de-excitation of cis-stilbene

2008 ◽  
Vol 353 (1-3) ◽  
pp. 104-108 ◽  
Author(s):  
Yusheng Dou ◽  
Weifeng Wu ◽  
Hong Tang ◽  
Roland E. Allen
Keyword(s):  
Laser Excitation ◽  
Ultrafast Laser

Ultrafast-laser Modification of Thermoelectric Sb2Te3 Thin Films

2012 ◽  
Vol 1456 ◽  
Author(s):  
Yuwei Li ◽  
Vladimir A. Stoica ◽  
Lynn Endicott ◽  
Guoyu Wang ◽  
Huarui Sun ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Thermal Conductivity ◽  
Thermoelectric Materials ◽  
Film Surface ◽  
Ultrafast Laser ◽  
Pulsed Lasers ◽  
Scan Speed ◽  
Improved Performance ◽  
Potential Use

ABSTRACTWe have modified Sb2Te3 thin film thermoelectric materials by scanning a femtosecond laser across the film surface to create track-like nanostructures. These nanotracks have widths of 50-80 nm and a periodicity of ∼ 130 nm. We show that the nanotrack morphology is highly dependent on laser fluence and scan speed. Moreover, we performed transient thermoreflectance measurements on a laser-irradiated film and found a thermal conductivity reduction of 4.5% in the nanostructured regions compared to that of the unmodified regions. These results suggest the potential use of femtosecond pulsed lasers to create nanostructured thermoelectric materials with improved performance.

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