Abstract
InGaAs photocathode with nanowire structure is studied by first-principles approach. The nanowire-structured InGaAs
photocathodes with GaAs or InP substrate are compared from three aspects: lattice structure, electronic structure and optical
properties. Interfaces of In0.5Ga0.5As-GaAs and In0.5Ga0.5As-InP are focused on research. In order to better describe the
optical properties, the light reception on the side of InGaAs nanowires is also analyzed. Crystal structures close to the two
sides of interfaces are both relaxed. Electronic structure and optical properties shows that the photocathode with GaAs
substrate is more beneficial to the absorption of light in the near-infrared band. In additional the electric field distribution at the
interface promote the transition of photoelectrons. Thereby the photoemission efficiency of the photocathode is improved.
Keywords
InGaAs photocathode, Nanowire structure, Interface, Optical absorption coefficient.
Citation
JING GUO, YUANYUAN LI, Research on interface properties of InGaAs photocathode with nanowire structure, Optoelectronics and Advanced Materials - Rapid Communications, 17, 1-2, January-February 2023, pp.8-14 (2023).
Submitted at: Sept. 15, 2022
Accepted at: Feb. 6, 2023