Hofstetter Daniel, Wieck Andreas D, Beck Hans, Bour David P
Independent Researcher, Chemin du Château 5, 2068 Hauterive, Switzerland.
Lehrstuhl für Angewandte Festkörperphysik, Ruhr-Universität Bochum, Universitätsstrasse 150, 44780 Bochum, Germany.
Micromachines (Basel). 2025 Jun 30;16(7):787. doi: 10.3390/mi16070787.
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.
我们报道了基于AlGaN/GaN的量子级联结构中的非对称形状的法诺共振。为了在电致发光中观察到这种类型的共振，一个光谱窄的特征必须与一个宽的、准连续的发射相互作用。虽然窄波形由92毫电子伏特（13.5微米，741厘米）的基于GaN的纵光学声子提供，但宽峰由几个从80到300毫电子伏特的高阶激发态与基态之间重叠的子带间跃迁组成。通过这些光谱不同的峰的干涉，产生了典型的非对称法诺线形。
