Temperature dependence of photoluminescence spectra in n-type modulation-doped quantum dot arrays |
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Authors: | Shintaro Nomura Takuo Sugano Yoshinobu Aoyagi |
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Abstract: | Temperature dependence of photoluminescence (PL) spectra of an electrostatically prepared modulation-doped quantum dot array is investigated. We report a strong temperature dependence of the enhanced PL near the Fermi energy between 0.4 and 4.2 K under a negative bias condition, where an interconnected quantum dot array is formed. This strong temperature dependence suggests that the Fermi-surface-mediated many-body interaction between a photo-created hole and the electron-gas plays an important role in the observed enhanced PL near the Fermi energy. |
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Keywords: | Quantum dot array Electron gas Photoluminescence |
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