Ultrafast dynamics of hemin aggregates

2017 ◽  
Vol 19 (39) ◽  
pp. 26862-26869 ◽  
Author(s):  
Arpita Nath ◽  
J. A. Dharmadhikari ◽  
A. K. Dharmadhikari ◽  
D. Mathur ◽  
S. Mazumdar
Keyword(s):  
Kerr Effect ◽  
Laser Pulses ◽  
Optical Kerr Effect ◽  
Ultrafast Dynamics ◽  
Time Resolved ◽  
Central Wavelength ◽  
Fs Laser

The effects of solvents on the conformation of hemin leading to ultrafast libration process have been probed using the time-resolved optical Kerr effect (OKE) with 35 fs laser pulses (at a central wavelength of 800 nm).

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.

Relaxation Dynamics of Water and HCl Aqueous Solutions Measured by Time-Resolved Optical Kerr Effect

1997 ◽  
Vol 101 (38) ◽  
pp. 7029-7035 ◽  
Author(s):  
Paolo Foggi ◽  
Marco Bellini ◽  
Dany P. Kien ◽  
Isabelle Vercuque ◽  
Roberto Righini
Keyword(s):  
Aqueous Solutions ◽  
Kerr Effect ◽  
Optical Kerr Effect ◽  
Relaxation Dynamics ◽  
Time Resolved

Time-resolved optical Kerr effect in a fragile glass-forming liquid, salol

1998 ◽  
Vol 57 (2) ◽  
pp. 1912-1920 ◽  
Author(s):  
Renato Torre ◽  
Paolo Bartolini ◽  
Robert Pick
Keyword(s):  
Kerr Effect ◽  
Optical Kerr Effect ◽  
Time Resolved ◽  
Glass Forming ◽  
Fragile Glass

Study on the Relations of Structure and the Ultrafast Optical Kerr Effect of Polynitriles

1997 ◽  
Vol 488 ◽  
Author(s):  
Q. Wang ◽  
Y. Y. Li ◽  
W. W. Pei ◽  
Y. K. He ◽  
C. Q. Luo ◽  
...  
Keyword(s):  
Glow Discharge ◽  
Power Law ◽  
Kerr Effect ◽  
Nonlinear Optical ◽  
Optical Kerr Effect ◽  
Time Resolved ◽  
Chemical Polymerization ◽  
Ultrafast Optical ◽  
Ft Ir ◽  
Effect Technique

AbstractA series of polybenzonitrile derivatives, prepared by plasma glow discharge processes or chemical polymerization, were characterized by FT-IR, UV-Vis, GPC and VPO etc. The secondorder nonlinear optical hyperpolarizability γ of various benzonitrile monomers and their, polymers were measured by the femtosecond time-resolved optical Kerr effect technique, and the structureproperty relationships were discussed. The power law dependence of γ on the averagepolymerization- degree of several polybenzonitrile derivatives were also reported.

Kinetics of optical Kerr effect induced by picosecond laser pulses

1980 ◽  
Vol 34 (2) ◽  
pp. 269-272 ◽  
Author(s):  
J. Etchepare ◽  
G. Grillon ◽  
R. Muller ◽  
A. Orszag
Keyword(s):  
Kerr Effect ◽  
Picosecond Laser ◽  
Laser Pulses ◽  
Optical Kerr Effect ◽  
Picosecond Laser Pulses ◽  
Kinetics Of
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