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Title: Topologically protected photonic modes in composite quantum Hall/quantum spin Hall waveguides

Journal Article · · Physical Review B
 [1];  [1];  [2];  [2];  [2];  [1]
  1. Univ. of Maryland, College Park, MD (United States)
  2. Cornell Univ., Ithaca, NY (United States)

Photonic topological systems, the electromagnetic analog of the topological materials in condensed matter physics, create many opportunities to create optical devices with novel properties. We introduce an experimental realization of the bi-anisotropic meta waveguide photonic system replicating both quantum Hall (QH) and quantum spin-Hall (QSH) topological insulating phases. With careful design, a composite QH-QSH photonic topological material is created and experimentally shown to support reflection-free edgemodes, a heterogeneous topological structure that is unprecedented in condensed matter physics. The effective spin degree of freedom of such topologically protected modes determines their unique pathways through these systems, free from backscattering and able to travel around sharp corners. As an instance of their novel properties, we experimentally demonstrate reflection-less photonic devices including a 2-port isolator, a unique 3-port topological device, and a full 4-port circulator based on composite QH and QSH structures.

Research Organization:
Univ. of Maryland, College Park, MD (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Science Foundation (NSF); US Department of the Navy, Office of Naval Research (ONR); US Air Force Office of Scientific Research (AFOSR)
Grant/Contract Number:
SC0018788; FA9550-15-1-0171; N000141512134; N000141912481; DMR-1120923; PHY-1415547
OSTI ID:
1558294
Alternate ID(s):
OSTI ID: 1550570
Journal Information:
Physical Review B, Vol. 100, Issue 8; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 8 works
Citation information provided by
Web of Science

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Figures / Tables (5)