Room temperature electro-optic effect in CdHgTe multiple quantum well heterostructures at 1.5/μm

摘要

We present a study of the room temperature electromodulation properties of CdHgTe heterostructures as a base component for a photorefractive device operating at 1.5 /μm. We reach absorption modulation as high as 200, in the near-gap transparent region of the spectrum, by application of a reverse bias- of the order of 100 kV/cm. We observe the transition from the Franz-Keldysh effect in 200 Anstrom wide wells to the quantum confined Stark effect in 90Anstrom wells. The calculated diffraction efficiency in a suitable photorefractive device would be of the order of 8 × 10↑(-4) in both cases. # 1997 American Institute of Physics. S0003-6951 (97)00107-1