All-optical pump-and-probe detection of two-time correlations in a Fermi gas

We have studied the laser-induced high-speed remagnetization and tunneling magnetoresistance (TMR) effects in tunnel magnetic junctions (TMJ). Using magneto-optical investigations, all-optical pump and probe technique, we have studied mechanisms of the laser-induced remagnetization and shown feasibility of the high-speed laser-controlled remagnetization and resistance switching in the TMJ. It is shown that the laser-induced remagnetization is caused by the internal effective magnetic fields of the inverse magneto-optical Faraday effect and the effective magnetic field of s–d-exchange interaction between the laser-induced spin-polarized current and a lattice magnetization together with a laser-induced thermal demagnetization.

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New all-optical pump-and-probe technique for the investigation of the ambipolar in-plane diffusion in n-i-p-i doping superlattices

ASDAM '98. Conference Proceedings. Second International Conference on Advanced Semiconductor Devices and Microsystems (Cat. No.98EX172) ◽

10.1109/asdam.1998.730217 ◽

2002 ◽

Author(s):

M. Vitzcthum ◽

D. Streb ◽

P. Kiesel ◽

M. Kneissl ◽

G.H. Dohler

Keyword(s):

Optical Pump ◽

Probe Technique ◽

Pump And Probe ◽

All Optical

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Simulation of multiwavelength conditions in laser picosecond ultrasonics

SIMULATION ◽

10.1177/0037549721996451 ◽

2021 ◽

pp. 003754972199645

Author(s):

Philippe Babilotte

Keyword(s):

Numerical Simulations ◽

Acoustic Signal ◽

Acoustic Waves ◽

Bulk Material ◽

Deformation Field ◽

Optical Pump ◽

Pump And Probe ◽

Oriented Object ◽

Numerical Approaches ◽

Picosecond Ultrasonics

Complete numerical simulations are given under SciLab® and MATLAB® coding environments, concerning propagative acoustic wavefronts, for laser picosecond ultrasonics under multiwavelength conditions. Simulations of the deformation field and its propagation into bulk material are given under different wavelength configurations for optical pump and probe beams, which are used to generate and to detect the acoustic signal. Complete insights concerning the dynamics of the acoustic waves are given, considering the absence of carrier diffusions into the material. Several numerical approaches are proposed concerning both the functions introduced to simulate the wavefront ( Heaviside or error) and the coding approach (linear/vectorized/ Oriented Object Programming), under the pure thermo-elastic approach.

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Comparative study of all-optical INVERTER and BUFFER gates using MZI structure

Journal of Optical Communications ◽

10.1515/joc-2020-0143 ◽

2020 ◽

Vol 0 (0) ◽

Author(s):

Pallavi Singh ◽

Ashutosh Kumar Singh ◽

Vanya Arun ◽

Devendra K Tripathi

Keyword(s):

Extinction Ratio ◽

Low Complexity ◽

Optical Amplifier ◽

Destructive Interference ◽

Eye Diagram ◽

Pump And Probe ◽

All Optical ◽

High Scalability ◽

Comparative Results ◽

Optical Gates

AbstractIn the paper, one input optical gates i.e., INVERTER and BUFFER have been designed using some basic assumption to analyze with the help of Semi-conductor Optical Amplifier based Mach–Zehnder Interferometer structure. The results are optimized by iterative process. The proposed design of optical gates presents low complexity, high scalability and more feasible to evaluate through digital Boolean analyzation. The digital Boolean analyzation is analyzed by some basic Boolean rules and assumptions which makes the design more digital so that it can be compatible for more than one input optical gates also. Optical Gate is designed to get constructive and destructive interference for pump and probe as they are injected into SOA simultaneously. The phase modulation is converted into intensity modulation which gives a Boolean result. The paper is optimized by Eye diagram, Q factor, wavelength spectrum and frequency chirp for both the gates. The comparative results of extinction ratio for both the gates have also been discussed. The design is supported by theoretical analysis, simulation tool (Optsim) and Boolean explanation. The proposed designs are constructed with same pattern which supports the same Boolean analysis.

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Optical pump-and-probe test system for thermal characterization of thin metal and phase-change films

Applied Optics ◽

10.1364/ao.44.003167 ◽

2005 ◽

Vol 44 (16) ◽

pp. 3167 ◽

Cited By ~ 8

Author(s):

Kazuo Watabe ◽

Pavel Polynkin ◽

Masud Mansuripur

Keyword(s):

Phase Change ◽

Thermal Characterization ◽

Test System ◽

Thin Metal ◽

Optical Pump ◽

Pump And Probe ◽

Probe Test

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Optical pump-and-probe measurement of the thermal conductivity of nitride thin films

Journal of Applied Physics ◽

10.1063/1.1505995 ◽

2002 ◽

Vol 92 (7) ◽

pp. 3820-3824 ◽

Cited By ~ 64

Author(s):

B. C. Daly ◽

H. J. Maris ◽

A. V. Nurmikko ◽

M. Kuball ◽

J. Han

Keyword(s):

Thin Films ◽

Thermal Conductivity ◽

Probe Measurement ◽

Optical Pump ◽

Pump And Probe

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Anomaly of Thermal Properties in Thin Films of La1-x SrxCoO3 Series Fabricated as Thermoelectric Materials

MRS Proceedings ◽

10.1557/proc-730-v8.1 ◽

2002 ◽

Vol 730 ◽

Author(s):

Yoshiaki Takata ◽

Hajime Haneda ◽

Yutaka Adachi ◽

Yoshiki Wada ◽

Takefumi Mitsuhashi ◽

...

Keyword(s):

Thin Films ◽

Thermal Properties ◽

Thermal Diffusivity ◽

Thermoelectric Materials ◽

Signal Analysis ◽

Material Synthesis ◽

Thermo Electric ◽

Optical Pump ◽

Pump And Probe ◽

Reflection Geometry

AbstractComposition spreads of La1-xSrxCoO3 (LSCO) were synthesized as thermo-electric transducer material by means of combinatorial material synthesis, and information on their thermal diffusivity throughout the specimens was obtained. Meanwhile, it is anticipated that the composition spreads of LSCO have a variety of characteristic properties of light absorption corresponding to their composition, namely their compositional variable, x. Hence, we used transient optical pump-and-probe techniques in a reflection geometry to measure thermal diffusion times on LSCO. The results of signal analysis indicate that LSCO is a peculiar synthesized substance whose apparent thermal diffusivity, 1/ι, changes abruptly at the critical point, where the compositional variable x is equal to 0.3.

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