Estimation of Phase Coherent Length of Hot Electrons in GaInAs Using Resonant Tunneling Diodes

Abstract
The relationship between the resonant level width of resonant tunneling diodes (RTD) and the coherent length of electrons is investigated theoretically. The resonant level widths were measured using the second derivative of the J-V characteristics of GaInAs/InP RTDs. Measured data are compared with theory, and it is estimated that the coherent length of hot electrons is longer than 50 to 90 nm.