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1

Low-Speed and Suspended Propagation of Light Pulses in Atomic Medium with Electromagnetically Induced Transparency

100%

Dziczek D., Ziętek B., Chwirot S.

Acta Physica Polonica A

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2004

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vol. 106

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issue 1

13-23

EN

Experiments on hot rubidium vapor as an atomic medium with electromagnetically induced transparency for radiation of 795 nm wavelength (D1 absorption line of rubidium) are reported. Propagation of light pulses with velocity reduced to 11.5 km/s has been observed with a significant modification of the shape of square input pulses to adapt to the spectral window of induced transparency. So-called light storage, i.e. suspension of the propagation of light pulses in the medium by temporary turn-off of the electromagnetically induced transparency state was also demonstrated. "Storage" periods of several microseconds, limited by relatively fast relaxation of atomic spin polarization in the volume of interaction of atoms with radiation, were obtained.

2

Polarization and Optical Excitation Function of Resonance Radiation of Cadmium Atoms Excited by Electron Impact

100%

Dziczek D., Piwiński M., Grądziel M., Chwirot S.

Acta Physica Polonica A

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2003

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vol. 103

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issue 1

3-11

EN

First measurements of polarization of 228.8 nm radiation emitted by cadmium atoms excited to the first singlet state (5 ^1P_1) following impact of electrons were carried out for the electron energy range 20-500 eV. New data were also obtained on the relative optical excitation function up to electron energy of 500 eV, which extend lower energy results published previously by other researchers.

3

Optical-Excitation Function and Polarization of 4227-Å Resonance Line of Ca Excited by 8-500 eV Electron Impact

100%

Dziczek D., Dyl D., Piwiński M., Chwirot S.

Acta Physica Polonica A

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1998

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vol. 93

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issue 5-6

717-721

EN

We report on measurements of the relative optical-excitation function for the 4^{1}P state of Ca and polarization degree of the 4227-Å resonance line. The measurements were carried out using crossed low-density beams of electrons and calcium atoms, for incident electron energies from 8 to 500 eV. For each electron energy we have used 28 results obtained at different polarizer positions from 0-180 ̊ to extract the required parameters. Excellent agreement between the present results and earlier predictions has been found.

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Low-Speed and Suspended Propagation of Light Pulses in Atomic Medium with Electromagnetically Induced Transparency

Polarization and Optical Excitation Function of Resonance Radiation of Cadmium Atoms Excited by Electron Impact

Optical-Excitation Function and Polarization of 4227-Å Resonance Line of Ca Excited by 8-500 eV Electron Impact