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Aperiodically Poled Nonlinear Crystals as Sources of Multi-Frequency Laser Radiation

100%

Novikov A., Laptev G.

Acta Physica Polonica A

2007

vol. 112

issue 5

1073-1078

The new multi-frequency process, which consists of three coupled nonlinear optical interactions: two parametric down-conversions and one up-conversion, in aperiodically poled nonlinear crystal is investigated. The spatial dynamics of wave intensities is studied in detail. The possibility of secondary simplification of coupled equations for correct describing the dynamics of wave interactions is demonstrated. The optimal conditions for parametrical instability of the initial stage of wave interactions are found.

Exponential machines

81%

Novikov A., Trofimov M., Oseledets I.

2018

issue 6

Magnetotransport in Si ⟨Sb⟩ Delta-Layer after Swift Heavy Ion-Induced Modification

52%

Fedotov A., Skuratov V., Yurasov D., Novikov A., Svito I., Apel P., Fedotov A., Zukowski P., Fedotova V.

Acta Physica Polonica A

2017

vol. 132

issue 2

229-232

In the present paper the investigations of the influence of swift heavy ion irradiation on the magnetotransport in the antimony (Sb) δ-layer in silicon are reported. Temperature and magnetic field dependences of the resistance R(T,B) and the Hall coefficient R_H(T,B) in the temperature range of 2K < T < 300K and B ≤ 8T before and after the 167 MeV Xe⁺²⁶ ion irradiation (ion fluence of 10⁸ cm¯²) were measured. At the temperatures below 50K there is observed the transition from the Arrhenius log R(1/T) to a logarithmic R ≈ -log(T) dependence both before and after the swift heavy ion exposure which confirms the assumption that the carrier transport goes through the δ-layer mainly. Moreover, the transition from the positive to negative magnetoresistance was observed with the temperature decrease that is characteristic of the two-dimensional quantum corrections to the conductivity in the case of weak localization regime. The appropriate Thouless lengths L_{Th}(T) ≈ A × T^{p} (where p and A are dependent on the scattering mechanism) indicated their ≈ 25-30% decrease after the swift heavy ion exposure. It was shown that the exponent p values were close to the theoretical one of p = 1, confirming the realization of 2D weak localization regime in the carrier transport.

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2 Acta Physica Polonica A

1 Bulletin of the Polish Academy of Sciences: Technical Sciences

1 2018

1 2017

1 2007

3 Novikov A.

1 Apel P.

1 Fedotov A.

1 Fedotova V.

1 Laptev G.

1 Oseledets I.

1 Skuratov V.

1 Svito I.

1 Trofimov M.

1 Yurasov D.

1 Zukowski P.

Search results

Aperiodically Poled Nonlinear Crystals as Sources of Multi-Frequency Laser Radiation

Exponential machines

Magnetotransport in Si ⟨Sb⟩ Delta-Layer after Swift Heavy Ion-Induced Modification