The effect of an electric-field gradient on avalanche noise
The effect of an electric-field gradient on avalanche noise
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电场梯度对雪崩噪声的影响
DOI：
10.1063/1.125202
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发表时间：
1999
影响因子：
4
通讯作者：
G. Rees
中科院分区：
文献类型：
--
作者：
S. Plimmer;C. Tan;J. David;R. Grey;K. F. Li;G. Rees
用蒙特卡罗模型和实验研究了电场梯度对雪崩噪声的影响。非局部效应导致噪声显着降低，作为电场梯度增加的p+-n结。对于相同的电子和空穴电离系数，当载流子注入到这些结构的高场端时，总是实现较低的噪声。此外，对于恒定的噪声系数和耗尽层厚度，与p+-i-n+结相比，在p+-n结中总是实现更高的增益。结果解释电离事件的相干性。
The effect of an electric-field gradient on the excess avalanche noise is examined using both a Monte Carlo model and experiment. Nonlocal effects cause the noise to be significantly reduced as the electric-field gradient increases in a p+–n junction. For equal electron and hole ionization coefficients, lower noise is always achieved when carriers are injected into the high field end of these structures. Furthermore, for a constant noise figure and depletion thickness, a higher gain is always achieved in a p+–n junction compared a p+–i–n+. The results are explained in terms of coherence in ionization events.