Low-voltage-tunable distributed Bragg reflector using InGaAs/GaAs quantum wells

The operation of the first multiple quantum well (MQW) voltage-tunable distributed Bragg reflector (DBR) with inter-digitated contacts is discussed. Application of only +1 V produces a 12% change in reflectivity, demonstrating the advantages of the interdigitated contact scheme. Qualitative features of the optical response are successfully modeled using the transmission matrix method and absorption and refractive index spectra deduced from transmission measurements of a InGaAs/GaAs quantum-well control sample.<
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