Long–lived femtosecond photon echo in thin films on localized exciton states at room temperature

Long–lived femtosecond photon echo was excited at room temperature in a two–photon regime on the charged exciton states (trion type) localized on the surface defects of a three–layer textured ZnO/Si(B)/Si(P) film with the thickness of each layer at 100 nm in a longitudinal uniform magnetic field. The irreversible longitudinal relaxation time T1 for the long–lived photon echo regime was of the order of 40 ps, whereas when measured with the help of the stimulated photon echo generated in the single–photon mode, the value was found not to exceed 600 fs

Long–lived femtosecond photon echo in thin films on localized exciton states at room temperature

Long–lived femtosecond photon echo was excited at room temperature in a two–photon regime on the charged exciton states (trion type) localized on the surface defects of a three–layer textured ZnO/Si(B)/Si(P) film with the thickness of each layer at 100 nm in a longitudinal uniform magnetic field. The irreversible longitudinal relaxation time T1 for the long–lived photon echo regime was of the order of 40 ps, whereas when measured with the help of the stimulated photon echo generated in the single–photon mode, the value was found not to exceed 600 fs

Ultrafast dynamics of photoprocesses induced by femtosecond IR laser radiation in iron pentacarbonyl molecules and clusters

Ultrafast dynamics of photoinduced processes in [Fe(CO)5]n clusters and free Fe(CO)5 molecules excited by resonant femtosecond IR radiation (λ ~ 5 μm) were studied in a molecular beam. Using a pump-probe teqnique characteristic rates of these processes were obtained and theoretically analyzed

Ultrafast dynamics of photoprocesses induced by femtosecond IR laser radiation in iron pentacarbonyl molecules and clusters

Ultrafast dynamics of photoinduced processes in [Fe(CO)5]n clusters and free Fe(CO)5 molecules excited by resonant femtosecond IR radiation (λ ~ 5 μm) were studied in a molecular beam. Using a pump-probe teqnique characteristic rates of these processes were obtained and theoretically analyzed

Ultrafast dynamics of photoprocesses induced by femtosecond IR laser radiation in iron pentacarbonyl molecules and clusters

Ultrafast dynamics of photoinduced processes in [Fe(CO)5]n clusters and free Fe(CO)5 molecules excited by resonant femtosecond IR radiation (λ ~ 5 μm) were studied in a molecular beam. Using a pump-probe teqnique characteristic rates of these processes were obtained and theoretically analyzed

Magneto-optical properties of the photon echo: status of research and prospects of application

The results of the study of the polarization properties of the stimulated photon echo (SPE) excited at room temperature on free excitons and exciton states localized on surface defects of textured thin films are reported. The results of observation and investigation of the effect of the non-Faraday rotation of a femtosecond SPE in a textured thin film are presented. The physical processes occurring under the Faraday effect and the effect of the non-Faraday rotation of the photon echo (PE) polarization plane are compared

Magneto-optical properties of the photon echo: status of research and prospects of application

The results of the study of the polarization properties of the stimulated photon echo (SPE) excited at room temperature on free excitons and exciton states localized on surface defects of textured thin films are reported. The results of observation and investigation of the effect of the non-Faraday rotation of a femtosecond SPE in a textured thin film are presented. The physical processes occurring under the Faraday effect and the effect of the non-Faraday rotation of the photon echo (PE) polarization plane are compared

On-line registration of femtosecond time intervals based on polarization properties of femtosecond stimulated photon echo generated on exciton states

This paper reflects the results of the research on the character of the dependence of the non-Faraday rotation of the femtosecond stimulated photon echo polarization plane on the time interval between the second and third exciting pulses, discretely varying from 180 to 900 fs in increments 180 fs. The time interval between the first and second pulses was equal to zero. The echo signal was formed at room temperature on exciton states localized on the surface defects of a thin three-layer textured ZnO/Si(P)/Si(B) film in the presence of a homogeneous magnetic field of 0.25 mT applied longitudinally to the optical excitation axis. The qualitative coincidence of the investigated dependence with the theoretical prediction of the investigated effect for gaseous medium is shown

On-line registration of femtosecond time intervals based on polarization properties of femtosecond stimulated photon echo generated on exciton states

This paper reflects the results of the research on the character of the dependence of the non-Faraday rotation of the femtosecond stimulated photon echo polarization plane on the time interval between the second and third exciting pulses, discretely varying from 180 to 900 fs in increments 180 fs. The time interval between the first and second pulses was equal to zero. The echo signal was formed at room temperature on exciton states localized on the surface defects of a thin three-layer textured ZnO/Si(P)/Si(B) film in the presence of a homogeneous magnetic field of 0.25 mT applied longitudinally to the optical excitation axis. The qualitative coincidence of the investigated dependence with the theoretical prediction of the investigated effect for gaseous medium is shown