Space charge limited electron emission from a Cu surface under ultrashort pulsed laser irradiation

作者：Wendelen W^*; Autrique D; Bogaerts A

来源：Applied Physics Letters, 2010, 96(5): 051121.

DOI：10.1063/1.3292581

• copper
• high-speed optical techniques
• laser beam effects
• multiphoton processes
• photoemission
• space charge
• thermionic electron emission

In this theoretical study, the electron emission from a copper surface under ultrashort pulsed laser irradiation is investigated using a one-dimensional particle in cell model. Thermionic emission as well as multiphoton photoelectron emission were taken into account. The emitted electrons create a negative space charge above the target; consequently the generated electric field reduces the electron emission by several orders of magnitude. The simulations indicate that the space charge effect should be considered when investigating electron emission related phenomena in materials under ultrashort pulsed laser irradiation of metals.

• 出版日期2010-2-1