Effect of Impurities on the Quantum Shot Noise Resonance in Double-Heterostructure Lasers

概要

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The quantum shot noise behaviours were investigated on conventional planar stripe lasers doped with different impurities to the active layer. The impurity effect was observed clearly on the shot noise resonance at low temperatures, that is, the lasers doped with group II acceptor impurities and lasers with the non-doped active layer showed the white noise spectrum at temperatures below 100 K. On the contrary, the lasers doped with group IV donor or amphoteric impurities showed a sharp resonant noise spectrum even at 77 K. The former two kinds of lasers showed very narrow spontaneous emission spectra at low temperatures as compared with the latter two kinds of lasers. This observation suggests that impurity effect on the shot noise resonance may be explained by the suppression effect brought about by the increased spontaneous emission that falls on the lasing modes.
社団法人応用物理学会の論文
1977-12-05