【摘要】：結合表面等離子(SP)的特性,研制了砷化鎵材料沉積金膜以及Ga N發(fā)光層模型,通過金膜-介質間產生的SP增強作用來顯著提高LED的出光效率。理論上采用SP的周期光柵傳播與耦合強度模型,分析得出SP對發(fā)光效率放大倍數(shù)都能滿足耦合輻射與發(fā)射源自身輻射效率的比。發(fā)光實驗結果得出:通過金屬膜結構的沉積實現(xiàn)了反射率顯著下降,結果能夠將一部分損耗能量變化為光發(fā)射,改進模型能夠顯著提高發(fā)光效率。參數(shù)分析得出:模型設計為占空比0.81左右光柵周期能夠實現(xiàn)吸收率最大,此時能夠較好地實現(xiàn)SP增強LED出光效果;SP的增強作用實現(xiàn)了用于顯著改善弱光致發(fā)光的發(fā)光效率和非線性過程,且非線性過程能夠用來檢測不同襯底介質少量輻射。
[Abstract]:According to the characteristics of surface plasma (SP), the gold film deposition and Ga N luminous layer model of GaAs were developed. The efficiency of LED was significantly improved by the enhancement of SP produced between gold film and medium. In theory, the propagation and coupling intensity model of periodic grating of SP is adopted. It is concluded that the magnification of SP to luminescence efficiency can satisfy the ratio of coupling radiation to self-radiation efficiency of emission source. The results of luminescence experiment show that the reflectivity of the metal film can be reduced significantly by the deposition of the metal film structure, and the energy loss can be changed into light emission. The improved model can significantly improve the luminous efficiency. The results of parameter analysis show that the maximum absorptivity can be achieved when the duty cycle of the grating is about 0.81, and the SP enhanced LED light output can be achieved well at this time. The enhancement of SP can significantly improve the luminescence efficiency and nonlinear process of weak photoluminescence, and the nonlinear process can be used to detect a small amount of radiation from different substrate media.
【作者單位】： 麗水學院工學院;
【基金】：浙江省教育廳科研項目(Y201636941) 浙江省高校實驗室工作研究項目(ZD201604) 龍泉青瓷協(xié)同創(chuàng)新中心研究項目(LQQC2016023)
【分類號】：TN312.8

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