Phase-change materials (PCM) undergo a phase change transition from an insulating to a metallic phase via a physical mechanism like light-induced heating, external electric or magnetic field etc. Over the years, they have been proven a useful element in many photonic applications ranging from re-writable DVDs and all-optical modulators, to power limiters and switches. In most of these applications PCMs have been considered as stand-alone structures and not as an element of a photonic circuit like a photonic crystal. In this thesis we consider how the transport characteristics of such a PCM element are affected when it is a part of a photonic crystal. Using a numerical example, we show that the transmittance can become highly asymmetric within a broad range of light intensities. This effect can be utilized for directional light transmission (isolation), asymmetric optical limiting, or power switching.
Antonellis, Nicholas J., "Asymmetric Transmission In Photonic Structures With Phase-Change Components" (2018). Masters Theses. 207.
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