Observation of valley-selective microwave transport in photonic crystals

Observation of valley-selective microwave transport in photonic crystals

Recently, the discrete valley degree of freedom has attracted extensive attention in condensed matter physics. Here, we present an experimental observation of the intriguing valley transport for microwaves in photonic crystals, including the bulk valley transport and the valley-projected edge modes...

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Bibliographic Details
Published in:Applied physics letters Vol. 111; no. 25
Main Authors: Ye, Liping, Yang, Yuting, Hong Hang, Zhi, Qiu, Chunyin, Liu, Zhengyou
Format: Journal Article
Language:English
Published: Melville American Institute of Physics 18-12-2017
Subjects:
Applied physics
Condensed matter physics
Microwave photonics
Photonic crystals
Transport
Online Access:Get full text
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Summary:Recently, the discrete valley degree of freedom has attracted extensive attention in condensed matter physics. Here, we present an experimental observation of the intriguing valley transport for microwaves in photonic crystals, including the bulk valley transport and the valley-projected edge modes along the interface separating different photonic insulating phases. For both cases, valley-selective excitations are realized by a point-like chiral source located at proper locations inside the samples. Our results are promising for exploring unprecedented routes to manipulate microwaves.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.5009597