在本論文裡，我們展示了雙載子疊接式超發光二極體利用在不同發光波長的量子井間，加入透納接面在不同發光波長的量子井之間，而元件中心波長約為1.04μm的生物光學治療之窗，我們元件引入透納接面，使得載子可以在不同的量子井間循環，把傳統式超螢光發光二極體因載子分佈不均勻而n側量子井沒有充分利用到的問題給減小，我們的元件展現出極小的漏電流，及克服了載子分佈不均勻的現象製作出一個應用在許多生物光學的近紅外白色光源。 In this thesis, we demonstrate for the first time GaAs-based bipolar cascade superluminescent diodes (BC-SLDs), whose active region is composed of GaAs-based multiple quantum wells (MQWs) in series by a tunnel junction, operates around important bio-optical therapeutic window of 1.04-um wavelength. Due to the tunnel junction introducing carrier recycling in different QWs, non-uniform carrier distribution among distinct MQWs, that is a problem in conventional SLDs, whose electroluminescent spectrum is governed by the center wavelength of QWs near p-side, can be minimized. Our devices exhibit nice electrical characteristic of low leaky current and overcome the limit of non-uniform carrier distribution, presenting a promising prospect for fabricating and engineering a near infrared white-light source in lots of bio-optical applications.
