Selection rule and line shape of Dirac-cone modes in SOI photonic crystals (Conference Presentation)

2020 ◽  
Author(s):  
Yuanzhao Yao ◽  
Takashi Kuroda ◽  
Naoki Ikeda ◽  
Yoshimasa Sugimoto ◽  
Takaaki Mano ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
Line Shape ◽  
Selection Rule ◽  
Dirac Cone

Dirac dispersion in photonic hypercrystals

2015 ◽  
Vol 178 ◽  
pp. 45-59 ◽  
Author(s):  
Evgenii E. Narimanov
Keyword(s):  
Photonic Crystals ◽  
Finite Frequency ◽  
Dirac Cone ◽  
Hyperbolic Metamaterials ◽  
Optical Media

Photonic hypercrystals – the recently introduced concept of artificial optical media that combines the properties of hyperbolic metamaterials and photonic crystals [E. Narimanov, Phys. Rev. X, 2014, 4, 041014] – can support Dirac cone dispersion at a finite frequency.

scholarly journals Selection rule for Dirac-like points in two-dimensional dielectric photonic crystals

2013 ◽  
Vol 21 (6) ◽  
pp. 7699 ◽  
Author(s):  
Yan Li ◽  
Ying Wu ◽  
Xi Chen ◽  
Jun Mei
Keyword(s):  
Photonic Crystals ◽  
Selection Rule ◽  
Two Dimensional

scholarly journals Vortex index identification and unidirectional propagation in Kagome photonic crystals

Nanophotonics ◽  
2019 ◽  
Vol 8 (5) ◽  
pp. 833-840 ◽  
Author(s):  
Wei-Min Deng ◽  
Xiao-Dong Chen ◽  
Wen-Jie Chen ◽  
Fu-Li Zhao ◽  
Jian-Wen Dong
Keyword(s):  
Photonic Crystals ◽  
Optical Fibers ◽  
Electromagnetic Waves ◽  
Selection Rule ◽  
Fourier Spectrum ◽  
External Source ◽  
Higher Order ◽  
Edge States ◽  
Mode Identification ◽  
Vortex Field

AbstractVortex field in photonic metamaterials has been revealed in recent years, which provides an extra degree of freedom to control the behavior of electromagnetic waves, such as the unidirectional propagation in topological metamaterials and orbital angular momentum multiplexing in optical fibers. Achieving topologically protected unidirectionality needs an external source either with a vortex index of m = ±1 (i.e. 2πm phase winding around phase singularity) or with a spin index of ±1 (i.e. right- or left-handed circular polarization). However, it is still an open question on the relationship between higher-order (|m | > 1) vortex field and topological metamaterials. Here, we study the excitation of valley bulk states by a source with a higher-order vortex index in Kagome photonic crystals. The selection rule for the excitation of valley bulk states is derived and can be applied to predict the selective excitation of valley bulk states by a source with a higher-order vortex index. Interestingly, we find that the Fourier spectrum and the averaged Fourier spectrum of the Ez component enable us to identify the vortex index of the source. Besides, it is shown that the unidirectional edge states can be excited by a source with a vortex index of 1 or 2 in a straight or 120° detour waveguide. Our work paves the way for the demonstration of the selection rule and may have potential applications in optical mode identification.

scholarly journals Dirac cone switching in two-dimensional photonic crystals by rotation of the crystal basis

2019 ◽  
Vol 15 ◽  
pp. 102748 ◽  
Author(s):  
Jesus Manzanares-Martinez ◽  
Cesar Augusto Romero-Ramos ◽  
Jorge Alberto Gaspar-Armenta
Keyword(s):  
Photonic Crystals ◽  
Two Dimensional ◽  
Dirac Cone ◽  
Crystal Basis

Observation of trapped light induced by Dwarf Dirac-cone in out-of-plane condition for photonic crystals

2016 ◽  
Vol 25 (10) ◽  
pp. 107102 ◽  
Author(s):  
Subir Majumder ◽  
Tushar Biswas ◽  
Shaymal K Bhadra
Keyword(s):  
Photonic Crystals ◽  
Dirac Cone ◽  
Out Of Plane

Elusive photonic crystals come a step closer

Nature ◽  
2020 ◽  
Vol 585 (7826) ◽  
pp. 506-507
Author(s):  
John C. Crocker
Keyword(s):  
Photonic Crystals
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