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Pré-Publication, Document De Travail Année : 2023

On-chip Amorphous THz Topological Photonic Interconnects

Résumé

Valley Hall photonic crystals (VPCs) offer the potential to create topological waveguides capable of guiding light through sharp bends on a chip. They can seamlessly integrate with functional components while occupying minimal space, making them a promising technology for terahertz (THz) topological photonic integrated circuits. However, a significant limitation for THz-scale integrated VPC-based devices has been the absence of arbitrary bend interconnects. Due to the crystalline symmetry, the traditional VPC designs restrict waveguides to the principal lattice axes (i.e., only 0-, 60- or 120- degree orientations). Here, we present an on-chip, all silicon implementation of deformed VPCs enabling topological waveguides with a variety of shapes and bends. Although the lattice is amorphous and lacks long-range periodicity, the topological protection of the waveguides is sustained by short-range order. We experimentally demonstrate the robust on-chip transmission of THz waves through waveguides of complicated shapes and arbitrary bends. We implement an amorphous lattice that serves as a frequency-dependent router capable of splitting the input signal into two perpendicular output ports, which cannot be achieved with an undeformed VPC. In addition, we showcase on-chip THz communication through 90 degree and P-shaped VPC waveguides, achieving data rates of 72 Gbit/s and 32 Gbit/s, respectively. Our findings demonstrate that the amorphous topological photonic crystals significantly enhance the adaptability of on-chip interconnections while preserving the performance of the topological waveguides.

Dates et versions

hal-04359750 , version 1 (21-12-2023)

Identifiants

Citer

Rimi Banerjee, Abhishek Kumar, Thomas Tan Caiwei, Manoj Gupta, Ridong Jia, et al.. On-chip Amorphous THz Topological Photonic Interconnects. 2023. ⟨hal-04359750⟩
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