|Titolo:||Degradation of InGaN/GaN laser diodes investigated by micro-cathodoluminescence and micro-photoluminescence|
|Data di pubblicazione:||2013|
|Abstract:||We present an investigation of the degradation of InGaN/GaN laser diodes grown on a GaN substrate. The results indicate that: (i) Ageing induces a significant increase in the threshold current (Ith) of the lasers, which is attributed to an increase in non-radiative recombination; (ii) Ith increase is correlated to a decrease in the micro-cathodoluminescence signal measured (after the removal of the top metallization) in the region under the ridge; (iii) micro-photoluminescence measurements indicate that constant current stress increases non-radiative recombination within the quantum wells (and not only within the barriers), and induces an increase in the emission wavelength of the degraded region|
|Tipologia:||1.1 Articolo in rivista|
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