We provide a novel photonic topological insulator design (PTI) exhibiting the quantum-spin-Hall effect, which, as opposed to previous designs, is conceived using numerical optimization of the transmission through PTI edge states. Specifically, we use topology optimization to maximize the transmission of light through a carefully configured model domain composed of two photonic crystal phases. This leads to a numerically generated PTI, which features larger bandgaps than previously predicted for planar PTIs and excellent suppression of backscattering from sharp bends.
|Number of pages||2|
|Publication status||Published - 2019|
|Event||10th International Conference on Metamaterials, Photonic Crystals and Plasmonics - Instituto Superior Técnico, Lisbon, Portugal|
Duration: 23 Jul 2019 → 26 Jul 2019
|Conference||10th International Conference on Metamaterials, Photonic Crystals and Plasmonics|
|Location||Instituto Superior Técnico|
|Period||23/07/2019 → 26/07/2019|