High-time-resolution pump-probe system with broadband detection for the study of time-domain vibrational dynamics

We present an ultrafast transient absorption spectroscopy system in the visible combining high-sensitivity broadband detection with extreme temporal resolution. The instrument is based on an ultrabroadband sub-10 fs optical parametric amplifier coupled to an optical multichannel analyzer with fast electronics, enabling single-shot detection at 1 kHz repetition rate. For a given pump-probe delay τ, we achieve a differential transmission (ΔT/T) sensitivity of the order of 10−4 over the λpr = 490–720 nm probe wavelength range by averaging over 1000 shots, allowing the acquisition of complete two-dimensional ΔT/T (λpr,τ) maps within a few minute measurement time. We present application examples highlighting the capability of this instrument to observe ultrafast dynamical processes, follow impulsively excited vibrational motions with frequency as high as 3000 cm−1 (11 fs period), and determine the probe wavelength dependence of amplitude and phase of the oscillations

Primary photo-events in a metastable photomerocyanine of spirooxazines

Primary photo-events in a metastable photomerocyanine of spirooxazine

Effect of evironment on ultrafast photoexcitation kinetics in single-wall carbon nanotubes

Effect of evironment on ultrafast photoexcitation kinetics in single-wall carbon nanotube

Transient Absorption Imaging of P3HT:PCBM Photovoltaic Blend:Evidence For Interfacial Charge Transfer State

Transient Absorption Imaging of P3HT:PCBM Photovoltaic Blend:Evidence For Interfacial Charge Transfer Stat

Ultrafast excited state relaxation in long-chain polyenes

Ultrafast excited state relaxation in long-chain polyene

Nanoscale Imaging of the Interface Dynamics in Polymer Blends by Femtosecond Pump-Probe Confocal Microscopy

Nanoscale Imaging of the Interface Dynamics in Polymer Blends by Femtosecond Pump-Probe Confocal Microscop

Observation of anomalous acoustic phonon dispersion in SrTiO3 by broadband stimulated Brillouin scattering

Observation of anomalous acoustic phonon dispersion in SrTiO3 by broadband stimulated Brillouin scatterin

Response to "Comment on 'Visualizing coherent phonon propagation in the 100 GHz range: A bradband picosecond acoustic approach'"

Response to "Comment on 'Visualizing coherent phonon propagation in the 100 GHz range: A bradband picosecond acoustic approach'

Observation of Terahertz Vibrations in the Nitrogenase FeMo Cofactor by Femtosecond Pump-Probe Spectroscopy

Observation of Terahertz Vibrations in the Nitrogenase FeMo Cofactor by Femtosecond Pump-Probe Spectroscop

Coherent Raman Microscopy with a Fiber-Format Femtosecond Laser Oscillator

Coherent Raman Microscopy with a Fiber-Format Femtosecond Laser Oscillato