Photoemission from an ultrabright and ultrafast LaB 6 nanowire electron emitter studied at atomic scale

Lanthanum hexaboride (LaB6) nanowire emitters have been demonstrated to work as monochromatic ultrabright field emitters. A small atomic array consisting of only a few La atoms at the foremost (100) facet generates a stark contrast of the surrounding work function. With the help of femtosecond laser pulses, we will show that this special surface morphology is also directly reflected in ...