TY - GEN
T1 - Tunable Topological Photonic Crystal Waveguides
AU - Chen, Menglin L.N.
AU - Jiang, Li Jun
AU - Sha, Wei E.I.
N1 - Funding Information:
ACKNOWLEDGMENT This work was supported in part by the Research Grants Council of Hong Kong GRF 17209918, AOARD FA2386-17-1-0010, NSFC 61271158, NSFC 61975177, HKU Seed Fund 201711159228, and Thousand Talents Program for Distinguished Young Scholars of China.
Publisher Copyright:
© 2021 Applied Computational Electromagnetics Society (ACES).
PY - 2021/7/28
Y1 - 2021/7/28
N2 - Edge states in topological photonic systems have the robust unidirectional propagation feature which originates from the topological nature of the bulk band dispersion. In this work, we propose a topological photonic crystal (PC) waveguide that is formed by introducing an air gap in an all-dielectric PC with C-{6v} symmetry. The dispersion of the line defect states is tunable by varying the width of the air gap. Based on their field distributions, the states can be classified into even- and odd-symmetric states. The even-symmetric states are found to be the nontrivial topological edge states and exhibit pseudospin-locking unidirectional propagation property. By introducing disorders to the waveguide, these states are proven to be robust with well suppressed backscattering.
AB - Edge states in topological photonic systems have the robust unidirectional propagation feature which originates from the topological nature of the bulk band dispersion. In this work, we propose a topological photonic crystal (PC) waveguide that is formed by introducing an air gap in an all-dielectric PC with C-{6v} symmetry. The dispersion of the line defect states is tunable by varying the width of the air gap. Based on their field distributions, the states can be classified into even- and odd-symmetric states. The even-symmetric states are found to be the nontrivial topological edge states and exhibit pseudospin-locking unidirectional propagation property. By introducing disorders to the waveguide, these states are proven to be robust with well suppressed backscattering.
KW - robust wave-guiding
KW - topological photonics
KW - tunable edge states
UR - http://www.scopus.com/inward/record.url?scp=85119348587&partnerID=8YFLogxK
U2 - 10.23919/ACES-China52398.2021.9581786
DO - 10.23919/ACES-China52398.2021.9581786
M3 - Conference article published in proceeding or book
AN - SCOPUS:85119348587
T3 - 2021 International Applied Computational Electromagnetics Society Symposium, ACES-China 2021, Proceedings
SP - 1
EP - 2
BT - 2021 International Applied Computational Electromagnetics Society Symposium, ACES-China 2021, Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 4th International Applied Computational Electromagnetics Society Symposium in China, ACES-China 2021
Y2 - 28 July 2021 through 31 July 2021
ER -