Time resolved EUV pump-probe microscopy of fs-LASER induced nanostructure formation

2011 ◽  
Author(s):  
R. Freiberger ◽  
J. Hauck ◽  
M. Reininghaus ◽  
D. Wortmann ◽  
L. Juschkin
Keyword(s):  
Time Resolved ◽  
Pump Probe ◽  
Probe Microscopy ◽  
Nanostructure Formation ◽  
Fs Laser

scholarly journals Pump-probe Microscopy Investigations on Fs-laser Ablation of Thin Ta2O5/Pt Layer Systems

2012 ◽  
Vol 39 ◽  
pp. 726-734 ◽  
Author(s):  
Stephan Rapp ◽  
Janosch Rosenberger ◽  
Daniel Trappendreher ◽  
Matthias Domke ◽  
Gerhard Heise ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Pump Probe ◽  
Probe Microscopy ◽  
Fs Laser

Nanoscale Heat Transport in Self-Organized Ge Clusters on Si(001)

2012 ◽  
Vol 1456 ◽  
Author(s):  
Tim Frigge ◽  
Annika Kalus ◽  
Friedrich Klasing ◽  
Martin Kammler ◽  
Anja Hanisch-Blicharski ◽  
...  
Keyword(s):  
Laser Pulses ◽  
Transient Temperature ◽  
Equivalent Thickness ◽  
Time Resolved ◽  
Pump Probe ◽  
Nanoscale Heat Transport ◽  
Self Organized ◽  
Transmission Electron ◽  
Fs Laser ◽  
Cooling Behavior

ABSTRACTUltrafast time resolved transmission electron diffraction (TED) in a reflection geometry was used to study the cooling behavior of self-organized, well defined nanoscale germanium hut and dome clusters on Si(001). The clusters were heated in a pump-probe scheme by fs-laser pulses. The resulting transient temperature rise was then determined from the drop in diffraction intensity caused by the Debye-Waller effect. From a cooling time of τ =177 ps we estimated a strongly reduced heat transfer compared with homogeneous films of equivalent thickness.

Ultrafast pump-probe microscopy reveals the mechanism of selective fs laser structuring of transparent thin films for maskless micropatterning

2014 ◽  
Vol 290 ◽  
pp. 368-372 ◽  
Author(s):  
Stephan Rapp ◽  
Janosch Rosenberger ◽  
Matthias Domke ◽  
Gerhard Heise ◽  
Heinz P. Huber ◽  
...  
Keyword(s):  
Thin Films ◽  
Pump Probe ◽  
Probe Microscopy ◽  
Laser Structuring ◽  
Fs Laser

Pump-Probe Measurements Using Silicon Nanocrystal Waveguides

2003 ◽  
Vol 770 ◽  
Author(s):  
Nathanael Smith ◽  
Max J. Lederer ◽  
Marek Samoc ◽  
Barry Luther-Davies ◽  
Robert G. Elliman
Keyword(s):  
Probe Beam ◽  
Time Resolution ◽  
Pump Beam ◽  
Silicon Nanocrystals ◽  
Continuous Wave ◽  
Optical Gain ◽  
Optical Pump ◽  
Time Resolved ◽  
Pump Probe ◽  
Probe Measurements

AbstractOptical pump-probe measurements were performed on planar slab waveguides containing silicon nanocrystals in an attempt to measure optical gain from photo-excited silicon nanocrystals. Two experiments were performed, one with a continuous-wave probe beam and a pulsed pump beam, giving a time resolution of approximately 25 ns, and the other with a pulsed pump and probe beam, giving a time resolution of approximately 10 ps. In both cases the intensity of the probe beam was found to be attenuated by the pump beam, with the attenuation increasing monotonically with increasing pump power. Time-resolved measurements using the first experimental arrangement showed that the probe signal recovered its initial intensity on a time scale of 45-70 μs, a value comparable to the exciton lifetime in Si nanocrystals. These data are shown to be consistent with an induced absorption process such as confined carrier absorption. No evidence for optical gain was observed.

scholarly journals Dual-shot dynamics and ultimate frequency of all-optical magnetic recording on GdFeCo

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Sicong Wang ◽  
Chen Wei ◽  
Yuanhua Feng ◽  
Hongkun Cao ◽  
Wenzhe Li ◽  
...  
Keyword(s):  
Magnetization Reversal ◽  
Energy Efficient ◽  
High Speed ◽  
Data Transfer ◽  
Laser Pulses ◽  
Time Resolved ◽  
All Optical ◽  
Fs Laser ◽  
High Speed Data ◽  
Natural Way

AbstractAlthough photonics presents the fastest and most energy-efficient method of data transfer, magnetism still offers the cheapest and most natural way to store data. The ultrafast and energy-efficient optical control of magnetism is presently a missing technological link that prevents us from reaching the next evolution in information processing. The discovery of all-optical magnetization reversal in GdFeCo with the help of 100 fs laser pulses has further aroused intense interest in this compelling problem. Although the applicability of this approach to high-speed data processing depends vitally on the maximum repetition rate of the switching, the latter remains virtually unknown. Here we experimentally unveil the ultimate frequency of repetitive all-optical magnetization reversal through time-resolved studies of the dual-shot magnetization dynamics in Gd27Fe63.87Co9.13. Varying the intensities of the shots and the shot-to-shot separation, we reveal the conditions for ultrafast writing and the fastest possible restoration of magnetic bits. It is shown that although magnetic writing launched by the first shot is completed after 100 ps, a reliable rewriting of the bit by the second shot requires separating the shots by at least 300 ps. Using two shots partially overlapping in space and minimally separated by 300 ps, we demonstrate an approach for GHz magnetic writing that can be scaled down to sizes below the diffraction limit.

Investigation on nonlinear dynamics of ZnO using time-resolved pump-probe technique with phase object

2011 ◽  
Author(s):  
Lirong Ge ◽  
Min Shui ◽  
Xiao Jin ◽  
Zhongguo Li ◽  
Yinglin Song
Keyword(s):  
Nonlinear Dynamics ◽  
Phase Object ◽  
Time Resolved ◽  
Pump Probe ◽  
Probe Technique
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