M. Sydor et al., ELECTROREFLECTANCE-PHOTOREFLECTANCE TECHNIQUE FOR STUDIES OF BUILT-INELECTRIC-FIELD IN LAYERED MATERIALS, Applied physics letters, 63(4), 1993, pp. 527-529
We use a new modulation technique to investigate photoreflectance from
layered electronic materials. The technique can be used to determine
the direction of the electric field, and separate the effects of elect
ric field modulation from extraneous modulations due to laser generate
d charge carriers.