Results found: 2

Number of results on page

Search results

Sort By:

Limit search:

Dynamics of the Intraband Light Absorption in Selectively Doped GaAs/AlGaAs Quantum Wells

100%

Vorobjev L., Panevin V., Fedosov N., Firsov D., Shalygin V., Seilmeier A., Schmidt S., Zibik E., Towe E., Kapaev V.

Acta Physica Polonica A

2005

vol. 107

issue 2

429-434

Spectral and temperature dependences of equilibrium and non-equi-intersubband light absorption in the mid-infrared spectral range were studied in selectively doped asymmetrical tunnel-coupled GaAs/AlGaAs quantum wells. The temporal evolution of the absorption studied by means of a picosecond pump-probe technique was found to have a biexponential character. The fast decay times are determined by intersubband electron relaxation due to electron scattering by optical phonons and impurities. The presence of long decay times in transient mid-infrared absorption is probably connected with electron transitions from the states in barrier (X and L valleys as well as deep centers) to the states of the quantum well. Experimentally determined intersubband scattering times are compared with the calculated ones.

Light Absorption and Photoluminescence in Quantum Dots and Artificial Molecules

72%

Firsov D., Vorobjev L., Panevin V., Fedosov N., Shalygin V., Samsonenko J., Tonkikh A., Cirlin G., Andreev A., Kryzhanovskaya N., Tarasov I., Pikhtin N., Ustinov V., Hanna S., Seilmeier A., Julien F., Zakharov N., Werner P.

Acta Physica Polonica A

2005

vol. 107

issue 1

158-162

Intraband absorption in n- and p-doped structures with InAs/GaAs quantum dots covered by InGaAs layers is studied both experimentally and theoretically. The absorption cross-section for p-type quantum dots was found to be significantly smaller than that for n-type quantum dots. Interband absorption bleaching under strong interband excitation is found and investigated in undoped quantum dot structures. Structures with artificial molecules were grown. Photoluminescence spectra and transmission electron microscopy images proves the presence of coupled symmetrical quantum dots.

Refine search results

2 Acta Physica Polonica A

2 2005

2 Fedosov N.

2 Firsov D.

2 Panevin V.

2 Seilmeier A.

2 Shalygin V.

2 Vorobjev L.

1 Andreev A.

1 Cirlin G.

1 Hanna S.

1 Julien F.

1 Kapaev V.

1 Kryzhanovskaya N.

1 Pikhtin N.

1 Samsonenko J.

1 Schmidt S.

1 Tarasov I.

1 Tonkikh A.

1 Towe E.

1 Ustinov V.

1 Werner P.

1 Zakharov N.

1 Zibik E.

Search results

Dynamics of the Intraband Light Absorption in Selectively Doped GaAs/AlGaAs Quantum Wells

Light Absorption and Photoluminescence in Quantum Dots and Artificial Molecules