Carrier emission of n-type gallium nitride illuminated by femtosecond laser pulses
Carrier emission of n-type gallium nitride illuminated by femtosecond laser pulses
复制标题
飞秒激光脉冲照射 n 型氮化镓的载流子发射
DOI:
10.1063/1.4972271
复制
发表时间:
2016-11
影响因子:
3.2
通讯作者:
Jie Zhang
中科院分区:
文献类型:
--
作者:
Runze Li;Pengfei Zhu;Jie Chen;Jianming Cao;Peter M. Rentzepis;Jie Zhang
The carrier emission efficiency of light emitting diodes is of fundamental importance for many technological applications, including the performance of GaN and other semiconductor photocathodes. We have measured the evolution of the emitted carriers and the associated transient electric field after femtosecond laser excitation of n-type GaN single crystals. These processes were studied using sub-picosecond, ultrashort, electron pulses and explained by means of a “three-layer” analytical model. We find that for pump laser intensities on the order of 1011 W/cm2, the electrons that escaped from the crystal surface have a charge of ∼2.7 pC and a velocity of ∼1.8 μm/ps. The associated transient electrical field evolves at intervals ranging from picoseconds to nanoseconds. These results provide a dynamic perspective on the photoemission properties of semiconductor photocathodes.
登录
查看更多内容
影响因子:
4
作者:
J. Pankove;H. Schade
通讯作者:
J. Pankove;H. Schade
影响因子:
4
作者:
D. J. Suntrup;G. Gupta;Haoran Li;S. Keller;U. Mishra
通讯作者:
D. J. Suntrup;G. Gupta;Haoran Li;S. Keller;U. Mishra
影响因子:
4
作者:
W. Wendelen;D. Autrique;A. Bogaerts
通讯作者:
W. Wendelen;D. Autrique;A. Bogaerts
影响因子:
3.2
作者:
A. Herrera‐Gomez;G. Vergara;W. Spicer
通讯作者:
A. Herrera‐Gomez;G. Vergara;W. Spicer
影响因子:
3.8
作者:
A. Ischenko;V. P. Spiridonov;L. Schäfer;J. D. Ewbank
通讯作者:
A. Ischenko;V. P. Spiridonov;L. Schäfer;J. D. Ewbank