Stimulated Raman spectroscopy with 0π pulses

Abstract

We developed a new variant of stimulated Raman spectroscopy with shaped short pulses, applicable to multiscattering media. The technique is based on the spectral modulation of the laser pulse due to the Raman scattering and may have a broad range of applications from spectroscopy and pathogen detection to microscopy.

Influence of coherent population trapping on Raman scattering

“…Adiabatic passage population transfer in the λ system for different space positions inside the cell achieved with initial STIRAP pulses given by Eqs. ( 27) and (28) very efficient population transfer from the ground state to the excited vibrational state. The time behavior of STIRAP laser pulses are shown in Fig.…”

“…Evolution of the STIRAP pulses for different space positions inside the cell filled with a three-level molecules achieved with initial STIRAP pulses given by Eqs. ( 27) and (28) It has a simple physical meaning and can be rewritten in the form of…”

“…The corresponding steep dispersion results in the ultraslow or ultrafast propagation of light pulses [19][20][21][22][23], which can be used for drastic modification of the phase-matching conditions for Brillouin scattering [24] and four-wave mixing [25]. It has been shown that the optical 0π pulses [26] under the condition of EIT [27,28] are very sensitive to resonant interaction and have advantages for use in Raman spectroscopy.…”

“…Adiabatic passage population transfer in the λ system for different space positions inside the cell achieved with initial STIRAP pulses given by Eqs. (27) and(28). Their amplitudes are (a) 10,20 = 5τ −1 , (b) 10,20 = 7τ −1 , and (c) 10,20 = 10τ −1 .…”

Suppression of coherent scattering by coherent population trapping on molecular vibrational levels

“…Recently, it was shown that the optical 0π-pulses [30] under the condition of electromagnetically induced transparency (EIT) [31,32] are very sensitive to resonant interaction, and have advantages to be used in Raman spectroscopy. Moreover, the femtosecond 0π-pulses were successfully used for detection of twophoton absorption in non-radiative media.…”