Abstract
The spontaneous emission properties of an artificial semiconductor lattice—quantum structure lattice (QSL)—with in-plane two-dimensional distributed-feedback (DFB) are reported. Quantum box arrays fabricated in strained InGaAs/GaAs quantum wells are used as lattice units in the QSL. The photoluminescence (PL) peak wavelength of the QSL shows the characteristic weak temperature dependence of a DFB structure (0.024 nm/K) between 77 and 150 K. The surface emission of the QSL array shows a collimated radiation pattern. The peak PL intensity has maximum values centered within ±30° of the surface normal and dropped off beyond that angle rapidly.
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