Ultrafast spectroscopywikipedia

Triggering pulse pump: Time resolutions                    ~ 30fs Spectrum                                ~ 50 nm Available wavelengths           266 nm, 400 nm, 800 nm (being extended to 230-2600 nm) Pump-probe delay                  0 – 6 ns, 10 fs resolution

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Triggering pulse pump: Time resolutions                    ~ 30fs Spectrum                                ~ 50 nm Available wavelengths           266 nm, 400 nm, 800 nm (being extended to 230-2600 nm) Pump-probe delay                  0 – 6 ns, 10 fs resolution

Ultrafast Spectroscopyapplication

Pump-probe spectroscopic ellipsometry Also located at the experimental cluster for optical spectroscopy is the station for pump-probe spectroscopic ellipsomety. This station is presented in the section for Soft X-ray material science and time-resolved ellipsometry.  (link to this section)

Ultrafast spectroscopyppt

Pump beams for photoactivations Pump beams synchronized with main photon beams will be serve for pump-probe experiments to investigate dynamical processes in matter. They will allow flexible configuration at different locations in the E1 hall, covering wavelengths from UV and visible to IR, and THz.

Front Matter1: Introduction2: Maxwell-Bloch Equations3: Nonlinear Pulse Propagation4: Laser Dynamics (single-mode)5: Active Mode Locking6: Passive Modelocking7: Kerr-Lens and Additive Pulse Mode Locking8: Semiconductor Saturable Absorbers9: Noise and Frequency Control10: Pulse Characterization11: Ultrafast Measurement TechniquesBack Matter

Triggering pulse pump: Time resolutions                    ~ 30fs Spectrum                                ~ 50 nm Available wavelengths           266 nm, 400 nm, 800 nm (being extended to 230-2600 nm) Pump-probe delay                  0 – 6 ns, 10 fs resolution

–IR spectroscopy (1 and 2D) Femtosecond mid IR spectroscopy is a tool for the study of bonds of molecular and solid state systems. The vibrational spectra are recorded with fs time resolutions. That allows us to follow conformational changes such as isomerization, bond breaking, bond formation, solvent dynamics etc.…

Ultrafast spectroscopyprinciple

Shaping pulse properties: Time resolution                                              ~5fs Spectral resolution                                         Tunable down to ~0.1 cm-1 Available spectra window                              266 nm – 2600 nm Maximal “pulse shaping generated delay”    10ps

Femtosecond stimulated Raman spectroscopy allows monitoring Raman vibrational spectra of molecules with sub-ps time resolution. When used with reactions that can be triggered, ideally photo-triggered, it is powerful tool to follow reaction dynamics and structural changes with high time resolution and high speed of acquisition.

Stimulated Raman probe: Time resolution                      ~100fs Spectral resolution                 ~1 cm-1 Observed spectral window    30 – 4000 cm-1 Raman pulse wavelength       760-840 nm

Ultrafast spectroscopypdf

Optical transient absorption Optical transient absorption spectroscopy is an experiment where changes in the sample absorbance are recorded with high time resolutions. It is a very robust technique for the characterization of excited and transient states of molecules, atoms and materials.

Ultrafastlaserspectroscopy

Thumbnail: Plot of the field of an ultrashort pulse, as well as its time-averaged intensity. (CC BY-SA 3.0 unported; Zueignung and edited by LibreTexts via Wikipedia)

2D IR spectroscopy is a technique for observing the presence and dynamics of cross-peaks expression of relations between individual bonds, with femtosecond resolution. Such an experiment is an IR-optical analogue of 2D NMR experiments, and likewise it produces richer data in structure.

This text covered issues regarding ultrafast optics including: Generation, propagation and applications of ultrashort pulses (nano-, pico-, femto-, attosecond pulses); Linear and nonlinear pulse shaping processes: Optical solitons, Pulse compression; Laser principles: Single- and multi-mode laser dynamics, Q-switching, Active and passive mode-locking; Pulse characterization: Autocorrelation, FROG, SPIDER; Noise in mode-locked lasers and its limitations in measurements; Laser amplifiers, optical parametric amplifiers, and oscillators; Applications in research and industry: Pump-probe techniques, Optical imaging, Frequency metrology, Laser ablation, High harmonic generation.

-Pulse shaping and coherent control Pulse shaping is a technique that allows to model spectral and temporal profile of the pulse. This has versatile applications in fields such as multidimensional spectroscopy, coherent control, and spatial and temporal signal encoding etc.

Fig: Top: Set up for fs Stimulated Raman Scattering in operation in the E1 experimental hall. Bottom: Set up for pulse shaping in operation together with a time-of-flight mass spectrometer during a user experiment where the effect of shaped pulses on catalytic reactions were investigated.

This page titled Book: Ultrafast Optics (Kaertner) is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by Franz X. Kaertner (MIT OpenCourseWare) via source content that was edited to the style and standards of the LibreTexts platform.