Abstract
Higher-interband transitions in short period (AlAs)m(GaAs)m superlattices are investigated as a function of layer period and pressure. Quantum confinement effects are observed in the E1 transition. The E1 transition energy increased with decreasing monolayer period. The transition energy approaches that of GaAs for larger monolayer periods (m≥15), and it approaches that of Al0.5Ga0.5As alloy for smaller monolayer periods (m≤4). The pressure coefficient of superlattices with m≥15 is the same as GaAs, but that of superlattices with m≤4 is the same as the Al0.5Ga0.5As alloy.
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