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- W2317316672 abstract "The paper describes a technique to visualize subbands in semiconductor superlattices, which consists of a photon counting method to measure extremely weak photoluminescence (PL) and an image processing using a personal computer for visualization. The technique has been applied to measure the electric-field dependence of the subbands for GaAs/AlAs superlattices with layer thicknesses of 6.8 nm/1.7 nm (sample 1), 6.2 nm/3.4 nm (sample 2) and 6.0 nm/5.0 nm (sample 3), respectively. The field effects of the subbands such as the resonance and Stark-ladder transition are clearly visualized from the PL images. We observed the PL emission between the second Γ(Γ2) and heavy hole (hh1) states due to the resonance between the ground Γ(Γ1) and Γ2 states, and the PL emission between the ground X (X1) and hh1 states due to the resonance between X1 and Γ2 states. Furthermore, we observed the PLs from the Stark-ladder transitions between the Γ1(+1) and hh1 states and between the X1(+1/2) and hh1 states. This technique is useful for studying electronic states in semiconductor superlattices." @default.
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- W2317316672 date "1998-01-01" @default.
- W2317316672 modified "2023-09-28" @default.
- W2317316672 title "Visualization of Subbands in Semiconductor Superlattices." @default.
- W2317316672 doi "https://doi.org/10.1380/jsssj.19.328" @default.
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