An achromatic pump–probe setup for broadband, few-cycle ultrafast spectroscopy in quantum materials

2021 ◽  
Vol 92 (10) ◽  
pp. 103003
Author(s):  
Emmanuel B. Amuah ◽  
Allan S. Johnson ◽  
Simon E. Wall
Keyword(s):  
Ultrafast Spectroscopy ◽  
Pump Probe ◽  
Quantum Materials

Collinear pump probe experiment, novel approach to ultrafast spectroscopy

1999 ◽  
Vol 68 (4) ◽  
pp. 689-692 ◽  
Author(s):  
B. Bousquet ◽  
L. Canioni ◽  
J. Plantard ◽  
L. Sarger
Keyword(s):  
Ultrafast Spectroscopy ◽  
Pump Probe ◽  
Novel Approach ◽  
Probe Experiment ◽  
Pump Probe Experiment

scholarly journals Solvent-dependent photo-induced dynamics in a non-rigidly linked zinc phthalocyanine–perylenediimide dyad probed using ultrafast spectroscopy

2017 ◽  
Vol 19 (31) ◽  
pp. 21078-21089 ◽  
Author(s):  
Bryan Kudisch ◽  
Margherita Maiuri ◽  
Vicente M. Blas-Ferrando ◽  
Javier Ortiz ◽  
Ángela Sastre-Santos ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Dynamic System ◽  
Ultrafast Spectroscopy ◽  
Light Harvesting ◽  
Zinc Phthalocyanine ◽  
Artificial Light ◽  
Pump Probe ◽  
Energy And Electron Transfer

A solvent dependent pump–probe study on an artificial light harvesting dyad reveals static and dynamic system-bath interactions observed in ultrafast photoinduced energy and electron transfer.

Ultrafast spectroscopy of quantum materials

Physics Today ◽  
2012 ◽  
Vol 65 (9) ◽  
pp. 44-50 ◽  
Author(s):  
Joseph Orenstein
Keyword(s):  
Ultrafast Spectroscopy ◽  
Quantum Materials

New insights into exciton binding and relaxation from high time resolution ultrafast spectroscopy of CH3NH3PbI3and CH3NH3PbBr3films

2016 ◽  
Vol 4 (9) ◽  
pp. 3546-3553 ◽  
Author(s):  
Vinay sharma ◽  
Sigalit Aharon ◽  
Itay Gdor ◽  
Chunfan Yang ◽  
Lioz Etgar ◽  
...  
Keyword(s):  
Time Resolution ◽  
Ultrafast Spectroscopy ◽  
Binding Energies ◽  
High Time ◽  
High Time Resolution ◽  
Pump Probe ◽  
Transient Spectra ◽  
Exciton Transitions

High time resolution broadband pump-probe experiments on CH3NH3PbI3and CH3NH3PbBr3films show that interband and exciton transitions are essential to understanding transient spectra, which reflect exciton binding energies of 20–30 meV in both materials.

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.

Density matrix and rate equation analyses for picosecond pump/probe combustion diagnostics

AIAA Journal ◽  
1999 ◽  
Vol 37 ◽  
pp. 723-731
Author(s):  
Thomas Settersten ◽  
Mark Linne ◽  
James Gord ◽  
Gregory Feichtner
Keyword(s):  
Density Matrix ◽  
Rate Equation ◽  
Pump Probe ◽  
Combustion Diagnostics

Two-Dimensional Infrared Spectroscopy From the Gas to Liquid Phase: Density Dependent J-Scrambling, Vibrational Relaxation, and the Onset of Liquid Character

2019 ◽  
Author(s):  
Greg Ng Pack ◽  
Matthew Rotondaro ◽  
Parth Shah ◽  
Aritra Mandal ◽  
Shyamsunder Erramilli ◽  
...  
Keyword(s):  
Vibrational Energy ◽  
Rotational Relaxation ◽  
Vibrational Energy Relaxation ◽  
Pump Probe ◽  
Solution Dynamics ◽  
Supercritical Phase ◽  
Supercritical Solution ◽  
Asymmetric Stretch ◽  
Two Dimensional Infrared Spectroscopy ◽  
Vibrational Equilibrium

Ultrafast 2DIR spectra and pump-probe responses of the N2O n 3 asymmetric stretch in SF6 as a function of density from the gas to supercritical phase and liquid are reported. 2DIR spectra unequivocally reveal free rotor character at all densities studied in the gas and supercritical region. Analysis of the 2DIR spectra determines that J-scrambling or rotational relaxation in N2O is highly efficient, occurring in ~1.5 to ~2 collisions with SF6 at all non-liquid densities. In contrast, N2O n 3 vibrational energy relaxation requires ~15 collisions, and complete vibrational equilibrium occurs on the ~ns scale at all densities. An independent binary collision model is sufficient to describe these supercritical state point dynamics. The N2O n 3 in liquid SF6 2DIR spectrum shows no evidence of free rotor character or spectral diffusion. Using these 2DIR results, hindered rotor or liquid-like character is found in gas and all supercritical solutions for SF6 densities ³ r * = 0.3, and increases with SF6 density. 2DIR spectral analysis offers direct time domain evidence of critical slowing for SF6 solutions closest to the critical point density. Applications of 2DIR to other high density and supercritical solution dynamics and descriptions are discussed. <br>

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