Time-resolved ultrafast transient polarization spectroscopy to investigate nonlinear processes and dynamics in electronically excited molecules on the femtosecond time scale

Thurston, Richard; Brister, Matthew M.; Belkacem, A.; Weber, Thorsten; Shivaram, Niranjan; Slaughter, Daniel

doi:10.1063/1.5144482

Cited by 4 publications

(2 citation statements)

References 57 publications

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“…Experimental methods suitable to measure the real part of the χ (3) tensor are numerous [1] and suffice it to say that OKE spectroscopy gathers time-resolved pumpprobe techniques tracking the changes (polarization, frequency, spatial phase or temporal phase) of a weak probe pulses under the effect of an intense pump pulse in the medium of interest, either without [4][5][6][7][8] or with [9,10] interferometric detection. Another related approach, twobeam coupling (2BC), relies on the mutual interaction between two noncollinear beams crossing in the medium [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear chirped Doppler interferometry for \c{hi}(3) spectroscopy

Neradovskaia¹,

Maingot²,

Chériaux³

et al. 2022

Preprint

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Four-wave mixing processes are ubiquitous in ultrafast optics and the determination of the coefficients of the χ (3) tensor is thus essential. We introduce a novel time-resolved ultrafast spectroscopic method to characterize the third-order nonlinearity on the femtosecond time-scale. This approach, coined as "nonlinear chirped Doppler interferometry", makes use of the variation of the optical group delay of a transmitted probe under the effect of an intense pump pulse in the nonlinear medium of interest. The observable is the spectral interference between the probe and a reference pulse sampled upstream. We show that the detected signal is enhanced when the pulses are chirped, and that, although interferometric, the method is immune to environmental phase fluctuations and drifts. By chirping adequately the reference pulse, the transient frequency shift of the probe pulses is also detected in the time domain and the detected nonlinear signal is enhanced. Nonlinear phase shifts as low as 10 mrad, corresponding to a frequency shift of 30 GHz, i.e. 0.01% of the carrier frequency, are detected without heterodyne detection or active phase-stabilization. The diagonal and/or nondiagonal terms of reference glasses (SiO2) and crystals (Al2O3, BaF2, CaF2) are characterized. The method is finally applied to measure the soft vibration mode of KTiOAsO4 (KTA).

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Section: Introductionmentioning

confidence: 99%

Nonlinear chirped Doppler interferometry for \c{hi}(3) spectroscopy

Neradovskaia¹,

Maingot²,

Chériaux³

et al. 2022

Preprint

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“…Very similarly, the Optical Kerr Gate (OKG) technique can be used by operating virtually the same setup and is able to measure transient anisotropy effects caused by strong optical pulses. (41,42) Thus, these examples show how versatile such a pump-probe setup can be.…”

Section: Transient Absorption and Other Pump And Probe Techniquesmentioning

confidence: 99%

Ultrafast pump-probe platform for broadband and polarization-resolved characterization of materials: case study of octupolar push-pull azobenzenes

Garcia

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Eu sei o que estou fazendo. Antes mesmo de ser mestre, Com esse azobenzeno, eu fiz um último teste. Eu excitei num só atto um gato vivo e morto. Feito assim só por um femto, Causando enorme lamento (ou alegramento). E depois de mais um pico, Morro abaixo num trupico, Uma interseção dramática. Forte, não-adiabática. Que do avesso e de repente Se tornou tão diferente Cisfigura metaestável, Com um remolejo amável. Tal movimento intrincado Me rendeu até um mestrado.

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Nonlinear Optical Properties of 2D Materials and their Applications

Xie,

Zhao,

et al. 2024

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Abstract2D materials are a subject of intense research in recent years owing to their exclusive photoelectric properties. With giant nonlinear susceptibility and perfect phase matching, 2D materials have marvelous nonlinear light‐matter interactions. The nonlinear optical properties of 2D materials are of great significance to the design and analysis of applied materials and functional devices. Here, the fundamental of nonlinear optics (NLO) for 2D materials is introduced, and the methods for characterizing and measuring second‐order and third‐order nonlinear susceptibility of 2D materials are reviewed. Furthermore, the theoretical and experimental values of second‐order susceptibility χ(2) and third‐order susceptibility χ(3) are tabulated. Several applications and possible future research directions of second‐harmonic generation (SHG) and third‐harmonic generation (THG) for 2D materials are presented.

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Time-resolved ultrafast transient polarization spectroscopy to investigate nonlinear processes and dynamics in electronically excited molecules on the femtosecond time scale

Cited by 4 publications

References 57 publications

Nonlinear chirped Doppler interferometry for \c{hi}(3) spectroscopy

Nonlinear chirped Doppler interferometry for \c{hi}(3) spectroscopy

Ultrafast pump-probe platform for broadband and polarization-resolved characterization of materials: case study of octupolar push-pull azobenzenes

Nonlinear Optical Properties of 2D Materials and their Applications

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