Search results

1

On the Method of Monitoring of Classical Vibrations in Sodium Dimer

100%

Kowalczyk P., Radzewicz C.

Acta Physica Polonica A

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1991

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vol. 79

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issue 4

429-436

EN

A computer simulation of an experiment allowing for monitoring of vibrational motion of the wave packet in the Na_{2} molecule is presented. The experiment is based on pump and delayed probe excitation followed by observation of laser-induced fluorescence.

2

Nonlinear Effects with Ultrashort Laser Pulses

81%

Wasylczyk P., Wasilewski W., Trippenbach M., Radzewicz C.

Acta Physica Polonica A

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2002

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vol. 101

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issue 1

89-104

EN

Propagation of an intense femtosecond laser pulse through a transparent nonlinear medium such as dielectric leads to a number of phenomena. In our experiment we observed complex spatial, spectral, and temporal structures appearing in the initially smooth femtosecond laser pulse when the pulse power is comparable to or higher than the critical power for self-focusing. We have also developed a complete, 3-dimensional theoretical model to describe the observed phenomena.

3

Laser Induced Fluorescence of Indium Vapour

81%

Weyh T., Kopystyńska A., Kowalczyk P., Radzewicz C.

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issue 6

801-804

EN

Indium vapour was illuminated with laser light in the wavelength range 350-372 nm and at 410.3 nm. A few fluorescence bands of In_{2} as well as a strong background emission of indium-quartz compounds were observed. An evidence of energy transfer processes in indium vapour was found.

4

Femtosecond Light Wave Packets

81%

Radzewicz C., Trippenbach M., Band Y., Krasinski J.

Acta Physica Polonica A

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1998

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vol. 93

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issue 1

237-251

EN

We analyze propagation of ultra short light pulses in a transparent, dispersive, nonlinear medium. A general formula for femtosecond wave packet evolution is developed and applied to specific problems. Theoretical and experimental results for wave packet distortion by lenses, wave packet rotation in birefringent media and group velocity matching in sum frequency generation are presented. Numerical results for splitting of femtosecond wave packets in dispersive Kerr media are also presented.

5

Femtosecond Dynamics of Neutral and Charged Exciton Absorption in Cd_{1-x}Mn_xTe Quantum Well

61%

Płochocka P., Kossacki P., Maślana W., Radzewicz C., Gaj J., Cibert J., Tatarenko S.

Acta Physica Polonica A

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2002

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vol. 102

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issue 4-5

679-686

EN

We present a study of time-dependent transmission spectra of a modulation-doped Cd_{1-x}Mn_xTe/Cd_{1-y-z}Zn_yMg_zTe quantum well with variable hole gas concentration. We study the influence of pump pulses on excitonic absorption in subpicosecond time scale. A spectrally broad probe pulse of duration of 40 femtoseconds was used to record the absorption spectra at controlled delay. Studies of temporal evolution of exciton energies revealed coherence decay of linearly polarized excitons and thermalization of non-equilibrium exciton states. We found that a characteristic timescale for thermalization of non-equilibrium populations of photocreated excitons is between 0.8 and 3.6 ps. The timescale of this process depends on the hole concentration in quantum well: for higher hole concentration the decay is faster. Long-lived photo-induced magnetization accompanied by heating of the magnetic system was also observed.

6

Precision spectroscopy of cold strontium atoms, towards optical atomic clock

42%

Bober M., Zachorowski J., Gawlik W., Morzyński P., Zawada M., Lisak D., Cygan A., Bielska K., Piwiński M., Trawiński R. S., Ciuryło R., Ozimek F., Radzewicz C.

Bulletin of the Polish Academy of Sciences: Technical Sciences

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2012

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issue 4

Refine search results

On the Method of Monitoring of Classical Vibrations in Sodium Dimer

Nonlinear Effects with Ultrashort Laser Pulses

Laser Induced Fluorescence of Indium Vapour

Femtosecond Light Wave Packets

Femtosecond Dynamics of Neutral and Charged Exciton Absorption in Cd_{1-x}Mn_xTe Quantum Well

Precision spectroscopy of cold strontium atoms, towards optical atomic clock