TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhysCore.7.3.039
TI  - THz higher-order topological photonics in Ge-on-Si heterostructures
PY  - 2024/07/04
UR  - https://scipost.org/SciPostPhysCore.7.3.039
JF  - SciPost Physics Core
JA  - SciPost Phys. Core
VL  - 7
IS  - 3
SP  - 039
A1  - Colombo, Ian
AU  - Minazzi, Pietro
AU  - Bonera, Emiliano
AU  - Pezzoli, Fabio
AU  - Pedrini, Jacopo
AB  - We design germanium-based higher-order topological cavities for terahertz applications by breaking the symmetry of a two-dimensional photonic crystal following the Su-Schrieffer-Heeger model. Calculations demonstrate the parity inversion of the electric field in differently deformed unit cells. The interface between domains of opposite topology presents edge and corner modes. The former are chiral, locking light propagation to its helicity. The latter prove that Ge-based structures can be used as high-order topological photonic crystals. These findings can accelerate the development of Si-photonic components working in a spectral range of high technological interest.
ER  -

@Article{10.21468/SciPostPhysCore.7.3.039,
	title={{THz higher-order topological photonics in Ge-on-Si heterostructures}},
	author={Ian Colombo and Pietro Minazzi and Emiliano Bonera and Fabio Pezzoli and Jacopo Pedrini},
	journal={SciPost Phys. Core},
	volume={7},
	pages={039},
	year={2024},
	publisher={SciPost},
	doi={10.21468/SciPostPhysCore.7.3.039},
	url={https://scipost.org/10.21468/SciPostPhysCore.7.3.039},
}