Impact of Transforming Interface Geometry on Edge States in Valley Photonic Crystals

Title

Impact of Transforming Interface Geometry on Edge States in Valley Photonic Crystals

 Author

Yu, D. (Kavli institute of nanoscience Delft; Student TU Delft)
Arora, S. (Kavli institute of nanoscience Delft; Student TU Delft)
Kuipers, L. (TU Delft QN/Quantum Nanoscience; Kavli institute of nanoscience Delft)

Department

QN/Quantum Nanoscience

 Date

2024

 Abstract

We investigate how altering the interface geometry from a zigzag to a glide plane interface between two topologically distinct valley Hall emulating photonic crystals (VPC), profoundly affects edge states. We experimentally observe a transition from gapless to gapped edge states, accompanied by the occurrence of slow light within the Brillouin zone, rather than at its edge. We numerically simulate the propagation and measure the transmittance of the modified edge states through a specially designed valley-conserving defect. The robustness to backscattering gradually decreases, suggesting a disruption of valley-dependent transport. We demonstrate the significance of interface geometry to gapless edge states in a VPC.


 To reference this document use:

http://resolver.tudelft.nl/uuid:73491ad5-d288-48a6-8dfd-5454ad5a7318

 DOI

https://doi.org/10.1103/PhysRevLett.132.116901

 ISSN

0031-9007

 Source

Physical Review Letters, 132 (11)

 Part of collection

Institutional Repository

 Document type

journal article

 Rights

© 2024 D. Yu, S. Arora, L. Kuipers
Files
PDF PhysRevLett.132.116901.pdf 1.06 MB
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