Fig. 1. Schematic diagram of experimental setup for the bright and dark configuration PR measurement. (a) Dark configuration; (b) Bright configuration

Fig. 2. Room temperature PR spectra measured by using dark and bright configurations for InP/InGaAs/InP heterostructure. （a） Dark configuration spectrum； （b） Bright configuration spectrum

Fig. 3. Room temperature PR and PL spectra measured by using dark configuration with 1 064 nm laser for InP/InGaAs/InP heterostructure. （a） 0.71-0.80 eV； （b） 1.15-1.45 eV