利用方波脉冲调制和正弦波调制方法对自生长台阶形的蓝光发光二极管(LED)进行脉冲响应特性及调制带宽的测量分析；并利用APSYS软件计算了此种台阶形蓝光LED的能带图，计算表明，台阶形导带带阶提高了43 meV，价带带阶下降了36 meV。这一结果说明：采用台阶形电子阻挡层(EBL)的结构设计，有利于提高LED的发光功率和响应特性，这一性能的提高主要是由于更高的有源区载流子注入密度，进而提升有源区的电子空穴辐射复合率。

The impulse response characteristics and modulation bandwidth of blue light-emitting diode with a special-designed AlGaN staircase electron blocking layer are investiggated by using square wave pulse and sine wave modulation methods. And the energy band diagrams of the blue light-emitting diode (LED) with this special-designed staircase electron blocking layer have been numerically investigated using the APSYS simulation software. The simulation shows that ΔEc increases 43 meV and ΔEv decreases 36 meV. The results show that blue light-emitting diode with a special-designed AlGaN staircase electron blocking layer has better light output power and response performance. The superior performance can be attributed to higher carrier injection density of the active region, which improves the electron/hole radiative recombination rate.