Valley photonic crystals for control of spin and topology.

@article{Dong2017ValleyPC,
  title={Valley photonic crystals for control of spin and topology.},
  author={Jianwen Dong and Xiaodong Chen and Hanyu Zhu and Yuan Wang and Xiang Zhang},
  journal={Nature materials},
  year={2017},
  volume={16 3},
  pages={
          298-302
        }
}
Photonic crystals offer unprecedented opportunity for light manipulation and applications in optical communication and sensing. Exploration of topology in photonic crystals and metamaterials with non-zero gauge field has inspired a number of intriguing optical phenomena such as one-way transport and Weyl points. Recently, a new degree of freedom, valley, has been demonstrated in two-dimensional materials. Here, we propose a concept of valley photonic crystals with electromagnetic duality… 
Tunable Electromagnetic Flow Control in Valley Photonic Crystal Waveguides
The exploration of binary valley degree of freedom in topological photonic systems has inspired many intriguing optical phenomena such as photonic Hall effect, robust delay lines, and perfect
Tunable topological valley transport in two-dimensional photonic crystals
Recently, exploring the valley degree of freedom in photonic crystals has attracted considerable attentions since it opens up the possibility of extending valleytronics to optics. However, the fi xed
Tunable topological valley transport in two-dimensional photonic crystals
Recently, exploring the valley degree of freedom in photonic crystals has attracted considerable attentions since it opens up the possibility of extending valleytronics to optics. However, the fixed
Pseudo-spin–valley coupled edge states in a photonic topological insulator
TLDR
It is demonstrated that inter-valley scattering is inhibited at a Y-junction between three sections with different valley topology, opening up the possibility of using the valley degree of freedom to control the flow of optical signals in 2D structures.
Valley photonic crystals
ABSTRACT Topological photonics is an emerging field that attracts enormous interest for its novel ways to engineer the flow of light. With the help of topological protection, the surface modes of
Topological Photonic Crystals: Physics, Designs, and Applications
Recent research in topological photonics has not only proposed and realized novel topological phenomena such as one‐way broadband propagation and robust transport of light, but also designed and
Spin- and valley-polarized one-way Klein tunneling in photonic topological insulators
TLDR
A new class of photonic systems, described by effective Hamiltonians in which competing synthetic gauge fields, engineered in pseudospin, chirality/sublattice, and valley subspaces, result in bandgap opening at one of the valleys, whereas the other valley exhibits Dirac-like conical dispersion.
Analysis of Unidirectional Coupling in Topological Valley Photonic Crystal Waveguides
Valley photonic crystal is a typical strategy of topological photonics with promising applications for novel integrated waveguides. The valley pseudospin provides an intrinsic paradigm to implement
Topological photonic crystals: a review
The field of topological photonic crystals has attracted growing interest since the inception of optical analog of quantum Hall effect proposed in 2008. Photonic band structures embraced topological
Topological Photonic Integrated Circuits Based on Valley Kink States
Valley pseudospin, a new degree of freedom in photonic lattices, provides an intriguing way to manipulate photons and enhance the robustness of optical networks. Here, topological waveguiding,
...
...

References

SHOWING 1-10 OF 39 REFERENCES
Topological photonics
Topological photonics is a rapidly emerging field of research in which geometrical and topological ideas are exploited to design and control the behavior of light. Drawing inspiration from the
Topological photonic phase in chiral hyperbolic metamaterials.
TLDR
The effective medium route to topological phases will pave the way for highly compact one-way transportation of electromagnetic waves in integrated photonic circuits and bridge the gap between the advancing field of topological band theory and classical optical phenomena such as the spin Hall effect of light.
Photonic topological insulators.
TLDR
It is shown that metacrystals-superlattices of metamaterials with judiciously designed properties-provide a platform for designing topologically non-trivial photonic states, similar to those identified for condensed-matter topological insulators.
Photonic Floquet topological insulators
TLDR
This work proposes and experimentally demonstrate a photonic topological insulator free of external fields and with scatter-free edge transport—a photonic lattice exhibiting topologically protected transport of visible light on the lattice edges.
Polarization Engineering in Photonic Crystal Waveguides for Spin-Photon Entanglers.
TLDR
It is demonstrated that the light-matter interaction can be asymmetric, leading to unidirectional emission and a deterministic entangled photon source, and understanding the phase associated with both the LDOS and the QD spin is essential for a range of devices that can be realized with a QD in a PCW.
Manipulating pseudospin-polarized state of light in dispersion-immune photonic topological metacrystals
We proposed a group-theory method to calculate topological invariant in bi-isotropic photonic crystals invariant under crystallographic point group symmetries. Spin Chern number has been evaluated by
Photonic Spin Hall Effect at Metasurfaces
TLDR
A strong photonic SHE resulting in a measured large splitting of polarized light at metasurfaces is reported, which may provide a route for exploiting the spin and orbit angular momentum of light for information processing and communication.
Deterministic photon-emitter coupling in chiral photonic circuits.
TLDR
It is shown that the helicity of the optical transition of a quantum emitter determines the direction of single-photon emission in a specially engineered photonic-crystal waveguide.
Photonic Analogue of Two-dimensional Topological Insulators and Helical One-Way Edge Transport in Bi-Anisotropic Metamaterials
Recent progress in understanding the topological pr operties of condensed matter has led to the discove ry of time-reversal invariant topological insulators. Because of limitations imposed by nature,
Experimental realization of photonic topological insulator in a uniaxial metacrystal waveguide.
TLDR
The photonic analogue of topological insulator is experimentally realized by embedding non-bianisotropic and non-resonant metacrystal into a waveguide and the topologically non-trivial bandgap is confirmed by experimentally measured transmission spectra and calculated non-zero spin Chern numbers.
...
...