Search results

Sort By:

Limit search:

Absorption and Photoluminescence of ZnSe/Zn_{x}Cd_{1-x}Se Superlattices and Quantum Wells under Hydrostatic Pressure

100%

Griebl E., Kerner W., Haserer B., Reisinger T., Hahn B., Gebhardt W.

Acta Physica Polonica A

1996

vol. 90

issue 5

1017-1021

We present absorption measurements of a pseudomorphic Zn_{0.75}Cd_{0.25}Se/ZnSe superlattice and a Zn_{0.91}Cd_{0.09} Se/ZnSe single quantum well under high hydrostatic pressure applied by a diamond anvil cell. Excitonic transitions as 1s-heavy hole and 1s-light hole between the first bound states or minibands as well as transitions in the buffer material are visible. Transition energies are well understood by calculations of the band structure near Γ. The observed energy distance between photoluminescence and hh-absorption signal gives information on exciton localization. Whereas this distance is nearly pressure independent in the buffer, there is a significant increase at pressures P > 5 GPa for quantum structures.

Absorption of Thin ZnSe, ZnS and ZnS_{x}Se_{1-x} Films under High Hydrostatic Pressure

100%

Griebl E., Schőtz G. F., Birzer C., Kerner W., Reisinger T., Hahn B., Gebhardt W.

Acta Physica Polonica A

1995

vol. 88

issue 5

995-999

We present absorption measurements on free-standing ZnSe, ZnS and ZnS_{x}Se_{1-x} films (d = 0.4...2 μm) under hydrostatic pressure up to 15 GPa. The refraction index n(λ,P) of ZnS and ZnSe in the transparent region up to 800 nm and the pressure shift of the E0 absorption edge of ZnSe and some ZnS_{x}Se_{1-x}-compositions was investigated at 293 K. At 2 K free exciton states near the E_{0-} and E_{0} + Δ_{0}-gap are visible in absorption. Increase in the Rydberg energy under pressure was found, which is explained with k • p-theory in the framework of the hydrogen model.

Refine search results

2 Acta Physica Polonica A

1 1996

1 1995

2 Gebhardt W.

2 Griebl E.

2 Hahn B.

2 Kerner W.

2 Reisinger T.

1 Birzer C.

1 Haserer B.

1 Schőtz G. F.

Search results

Absorption and Photoluminescence of ZnSe/Zn_{x}Cd_{1-x}Se Superlattices and Quantum Wells under Hydrostatic Pressure

Absorption of Thin ZnSe, ZnS and ZnS_{x}Se_{1-x} Films under High Hydrostatic Pressure