Abstract

Photonic graphene, a honeycomb lattice of evanescently coupled waveguides, has provided a superior platform for investigating a host of fundamental phenomena such as unconventional edge states, synthetic magnetic fields, photonic Landau levels, Floquet topological insulators, and pseudospin effects. Here, we demonstrate both experimentally and numerically, topological vortex degeneracy lifting and Aharonov–Bohm-like interference from local deformation in a photonic honeycomb lattice. When a single valley is excited, lattice deformation leads to the generation of a vortex pair due to the lifting of degeneracy associated with pseudospin states. In the case of double-valley excitation, we observe the Aharonov–Bohm-like interference merely due to the deformation of the graphene lattice, which gives rise to an artificial gauge field. Our results may provide insight into the understanding of similar phenomena in other graphene-like materials and structures.

© 2017 Optical Society of America

Full Article  |  PDF Article
More Like This
Valley-dependent beams controlled by pseudomagnetic field in distorted photonic graphene

Fusheng Deng, Yunmei Li, Yong Sun, Xiao Wang, Zhiwei Guo, Yunlong Shi, Haitao Jiang, Kai Chang, and Hong Chen
Opt. Lett. 40(14) 3380-3383 (2015)

Achieving nonreciprocal unidirectional single-photon quantum transport using the photonic Aharonov–Bohm effect

Luqi Yuan, Shanshan Xu, and Shanhui Fan
Opt. Lett. 40(22) 5140-5143 (2015)

Rabi-like oscillation of photonic topological valley Hall edge states

Hua Zhong, Yaroslav V. Kartashov, Yiqi Zhang, Daohong Song, Yanpeng Zhang, Fuli Li, and Zhigang Chen
Opt. Lett. 44(13) 3342-3345 (2019)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Metrics