Physics of Internal Photoemission and Its Infrared Applications in the Low-Energy Limit

Figure 9

(a) Dark - characteristics at different temperatures. (b) The Arrhenius plots of against , to determine the activation energies (). All of data result from measurements of mesas, except for SP1005, for which an additional device with the dimension of (open circles) is plotted to confirm the consistency. Also shown is a previously reported [11] symmetrical flat-barrier detector (SP3), which has the zero barrier offset; that is, eV. Its corresponds to the activation energy of the -type GaAs ()/As junction.

(a)

(b)