Title :
Modeling of electron emission from graphene and metal tip
Author :
Ang, L.K. ; Liang, S.J.
Author_Institution :
SUTD-MIT Int. Design Center, Singapore Univ. of Technol. & Design (SUTD), Singapore, Singapore
Abstract :
In this paper, we report our models on electron emission frm graphene and metallic tips. For graphene, we will cover 3 types of emission: field emission, over-barrier photo-emission and thermionic emission. On each model, we will highlight the main difference as compared to the traditional models that were constructed for metallic materials. For metallic tip, we will report a time-dependent quantum tunneling and non-equilibrium model to study the transition from multiphoton emission to optical field emission when a dc-biased metallic tip is excited by an ultrafast laser pulse. In particular, we will highlight that the smooth transition and number of photons required will be less when the laser pulse duration is decreased to a few cycle regime.
Keywords :
electron field emission; graphene; high-speed optical techniques; multiphoton processes; photoemission; thermionic electron emission; tunnelling; C; dc-biased metallic tips; electron emission; graphene; laser pulse duration; multiphoton emission; nonequilibrium model; optical field emission; over-barrier photoemission; photon number; thermionic emission; time-dependent quantum tunneling; Electron optics; Nonlinear optics; Photonics; Tunneling; cathode; eletron emission; graphene; metal tip;
Conference_Titel :
Vacuum Nanoelectronics Conference (IVNC), 2014 27th International
Conference_Location :
Engelberg
Print_ISBN :
978-1-4799-5306-6
DOI :
10.1109/IVNC.2014.6894779