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Article Abstract
We report on asymmetrically shaped Fano resonances in AlGaN/GaN-based quantum cascade structures. In order to observe this type of resonance in electro-luminescence, a spectrally narrow feature must interact with a broad, quasi-continuous emission. While the narrow waveform is provided by the GaN-based LO-phonon at 92 meV (13.5 µm, 741 cm), the broad peak consists of overlapping inter-subband transitions between several higher-order excited states ranging from 80 to 300 meV and the ground state. Through the interference of these spectrally dissimilar peaks, a typical, asymmetric Fano line shape is generated.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC12299037 | PMC |
| http://dx.doi.org/10.3390/mi16070787 | DOI Listing |
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