A conductive distributed Bragg reflector (DBR) composed entirely of a single material—indium tin oxide (ITO)—is reported. The high- and low-refractive-index layers of the DBR are deposited by oblique-angle deposition and consist of ITO thin films with low and high porosities, which yield an index contrast of Δn=0.4. A single-material DBR with three periods achieves a reflectivity of 72.7%, in excellent agreement with theory.
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Schubert et al. (2007) studied this question.
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