Ak. Abeeluck et al., Analytical modeling of the resolution of photorefractive multiple quantum well spatial light modulators, J APPL PHYS, 88(10), 2000, pp. 5850-5858
An analytical model that includes lateral drift of photocarriers is develop
ed to explain the experimental resolution of photorefractive multiple quant
um well (MQW) devices. The model is in excellent agreement with a phenomeno
logical fit proposed earlier and it follows a small intensity modulation mo
del closely. Charge distributions with and without lateral drift of carrier
s at the MQW interfaces are assumed in order to calculate the peak diffract
ion efficiency as a function of grating period. An effective mobility-lifet
ime product is used to account for the effect of lateral drift in the MQW r
egion. It is shown that good agreement with experiment is obtained when lat
eral drift is taken into account. Moreover, the model is applied to the stu
dy of design tradeoff between resolution, sensitivity, and diffraction effi
ciency which are all of crucial importance in the performance of practical
devices. (C) 2000 American Institute of Physics. [S0021-8979(00)00622-8].