Laser‐assisted electron emission from CVD nano‐graphite films

Abstract

We demonstrate that irradiation with nano-second light pulses results in significant enhancement of the electron emission from nano-graphite films. The observed emission current density is as high as 10 A/cm 2 at applied field of 2 V/µm. The duration of the emission pulse depends on the applied DC voltage and laser intensity. However, in our experimental conditions, the temporal profile of the electron pulse nearly reproduces that of the incident laser pulse.

Thermionic electron emission from chemical vapor deposition diamond by nanosecond laser heating

“…7 As shown in Fig. Hence, the slope corresponds to the effective work function of the material in thermionic emission ͑i.e., activation energy in Arrhenius plot͒.…”

Edge effect enhanced photo-thermionic emission from a carbon nanotubes array

“…[6][7][8] At the edges and protrusions of nanostructures, the optical field can be significantly enhanced, leading to an enhanced PEE. Among various nanomaterials, carbon nanotubes (CNTs) are of great interest 9,10 due to their several features: high aspect ratio, small tip radius, high mechanical and thermal stabilities, and high electrical conductivity. [11][12][13][14] Specially, high efficient photo-induced thermionic emission (PTE) [15][16][17][18] has been realized from the high density CNT film.…”