Effect of Dead Space on Avalanche Speed
Effect of Dead Space on Avalanche Speed
复制标题
死角对雪崩速度的影响
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
D. Ong
中科院分区：
文献类型：
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作者：
J. Ng;C. Tan;B. K. Ng;P. Hambleton;J. David;G. Rees;D. Ong
从保持载流子速度恒定但允许碰撞电离路径长度随机分布的数值模型中，得到了死区(在获得足够的能量以进行碰撞电离之前载流子通过的最小距离)对雪崩倍增过程的电流冲激响应和带宽的影响。结果表明，死区响应时间增加的主要机制是载流子基团数目的增加，这定性地描述了乘法链的长度。当死区可以忽略时，带宽遵循Emmons预测的Be-Havior，但随着死区的增加而减小。
The effects of dead space (the minimum distance trav- elled by a carrier before acquiring enough energy to impact ionize) on the current impulse response and bandwidth of an avalanche multiplication process are obtained from a numerical model that maintains a constant carrier velocity but allows for a random dis- tribution of impact ionization path lengths. The results show that the main mechanism responsible for the increase in response time with dead space is the increase in the number of carrier groups, which qualitatively describes the length of multiplication chains. When the dead space is negligible, the bandwidth follows the be- havior predicted by Emmons but decreases as dead space increases.