1,721,157 research outputs found
Phase - locked delay device including an optical wedge pair
No full textA phase-locked delay device, including: an input port configured to receive an input electromagnetic radiation pulse; said input pulse being to be propagated along a propagation direction and having a first linear polarization different from both a first direction, which is orthogonal to the propagation direction, and a second direction, which is orthogonal to the first direction and the propagation direction;an adjustable Babinet-Soleil module optically coupled to said input port, having a first polarization direction parallel to said first direction. The adjustable Babinet-Soleil module is structured to: provide from the input pulse a first pulse polarized along the first direction and a second pulse collinear to said first pulse and polarized along the second direction, and introduce an adjustable group delay between the first pulse and the second pulse ranging from a minim value ΔTm and a maximum value ΔTM; the maximum value ΔTM being a value greater than 10 fs
Phase-locked pulses for two-dimensional spectroscopy by a birefringent delay line
No full textWe introduce the translating wedge-based identical pulses encoding system, a novel device for the generation of collinear, interferometrically locked ultrashort pulse pairs. By means of birefringent wedges, we are able to control the pulse delay with attosecond precision and stability better that lambda/360, without affecting the pulse duration and in a spectral range that spans from UV to mid-IR. This device is expected to dramatically simplify two-dimensional spectroscopy experiments. (C) 2012 Optical Society of Americ
Electron Thermalization in Gold on the 10-fs Timescale
No full textUsing 5-fs visible probe pulses we study the electron distribution dynamics in thin gold films triggered by sub-15-fs near-IR pump pulses. We observe in real-time the build-up and decay of the thermal electron distribution. (C) 2010 Optical Society of Americ
Probing electron transfer in polymer/fullerene blends using ultrahigh time resolution coherent vibrational spectroscopy
No full textProbing electron transfer in polymer/fullerene blends using ultrahigh time resolution coherent vibrational spectroscop
Ultrabroadband pulse shaping with a push-pull deformable mirror
No full textUltrabroadband pulse shaping with a push-pull deformable mirro
Ultrahigh Time Resolution Nonlinear Spectroscopy of Polymer/fullerene Blends
No full textWe report ultrafast nonlinear spectra of polymer/fullerene blends measured with unprecedented 10-fs-time resolution. Our results suggest that an extremely fast exciton transport from the optically excited polymer to the fullerene acceptor precedes charge separation. (C) 2009 Optical Society of Americ
Observation of High-Frequency Coherent Vibrational Motion with Strongly Chirped Probe Pulses
No full textObservation of High-Frequency Coherent Vibrational Motion with Strongly Chirped Probe Pulse
Ultrabroadband pulse shaping with double side deformable mirror
No full textwe achieved ultrabroadband pulse shaping by use of a novel designed electrostatic deformable mirror based on push-pull technology. We demonstrated multi-pulse formation with programmable delay and sub-pulse length of 20 fs at 1.3 mu m. (C) 2010 Optical Society of Americ
Coherent phonon dynamics in semiconducting carbon nanotubes: a quantitative study of electron-phonon coupling
No full textWe excite and detect coherent phonons in semiconducting ð6; 5Þ carbon nanotubes via a sub-10-fs
pump-probe technique. Simulation of the amplitude and phase profile via time-dependent wave packet
theory yields excellent agreement with experimental results under the assumption of molecular excitonic
states and allows determining the electron-phonon coupling strength for the two dominant vibrational
modes
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