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Enhanced photoluminescence emission from higher subbands of nanopore lattices compared to a quantum well is presented. Increasing pore diameter enhances the excited state emission implying reduced intersubband scattering rate, consistent with theoretical calculations.
This study demonstrates the use of electronically coupled patterned quantum dots (QDs) fabricated using a wet-etching technique as the gain medium of a photonic device. This technique provides the unique ability to control both the spatial and spectral properties of QDs, while maintaining the high optical quality of the material necessary for photonics applications.
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