scholarly journals Recent Progress in Photonic Crystals

2016 ◽  
Author(s):  
Susumu Noda
Keyword(s):  
Photonic Crystals ◽  
Recent Progress

scholarly journals Pseudospin-1 Physics of Photonic Crystals

Research ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-15 ◽  
Author(s):  
A. Fang ◽  
Z. Q. Zhang ◽  
Steven G. Louie ◽  
C. T. Chan
Keyword(s):  
Photonic Crystals ◽  
Recent Progress ◽  
Berry Phase ◽  
Nodal Point ◽  
Band Shift ◽  
Effective Spin ◽  
Klein Tunneling ◽  
Accidental Degeneracy ◽  
Photonic States ◽  
Zero Index

We review some recent progress in the exploration of pseudospin-1 physics using dielectric photonic crystals (PCs). We show some physical implications of the PCs exhibiting an accidental degeneracy induced conical dispersion at the Γ point, such as the realization of zero refractive index medium and the zero Berry phase of a loop around the nodal point. The photonic states of such PCs near the Dirac-like point can be described by an effective spin-orbit Hamiltonian of pseudospin-1. The wave propagation in the positive, negative, and zero index media can be unified within a framework of pseudospin-1 description. A scale change in PCs results in a rigid band shift of the Dirac-like cone, allowing for the manipulation of waves in pseudospin-1 systems in much the same way as applying a gate voltage in pseudospin-1/2 graphene. The transport of waves in pseudospin-1 systems exhibits many interesting phenomena, including super Klein tunneling, robust supercollimation, and unconventional Anderson localization. The transport properties of pseudospin-1 systems are distinct from their counterparts in pseudospin-1/2 systems, which will also be presented for comparison.

Recent progress in responsive photonic crystals of block copolymers

2020 ◽  
Vol 8 (47) ◽  
pp. 16633-16647
Author(s):  
Simeng Liu ◽  
Yi Yang ◽  
Lianbin Zhang ◽  
Jiangping Xu ◽  
Jintao Zhu
Keyword(s):  
Block Copolymers ◽  
Photonic Crystals ◽  
Recent Progress ◽  
Structural Colour ◽  
External Stimuli

We highlight the recent progress of BCP PC films and microparticles having tunable structural colour in response to external stimuli.

scholarly journals Pseudospin-1 Physics of Photonic Crystals

Research ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-15 ◽  
Author(s):  
A. Fang ◽  
Z. Q. Zhang ◽  
Steven G. Louie ◽  
C. T. Chan
Keyword(s):  
Photonic Crystals ◽  
Recent Progress ◽  
Berry Phase ◽  
Nodal Point ◽  
Band Shift ◽  
Effective Spin ◽  
Klein Tunneling ◽  
Accidental Degeneracy ◽  
Photonic States ◽  
Zero Index

We review some recent progress in the exploration of pseudospin-1 physics using dielectric photonic crystals (PCs). We show some physical implications of the PCs exhibiting an accidental degeneracy induced conical dispersion at the Γ point, such as the realization of zero refractive index medium and the zero Berry phase of a loop around the nodal point. The photonic states of such PCs near the Dirac-like point can be described by an effective spin-orbit Hamiltonian of pseudospin-1. The wave propagation in the positive, negative, and zero index media can be unified within a framework of pseudospin-1 description. A scale change in PCs results in a rigid band shift of the Dirac-like cone, allowing for the manipulation of waves in pseudospin-1 systems in much the same way as applying a gate voltage in pseudospin-1/2 graphene. The transport of waves in pseudospin-1 systems exhibits many interesting phenomena, including super Klein tunneling, robust supercollimation, and unconventional Anderson localization. The transport properties of pseudospin-1 systems are distinct from their counterparts in pseudospin-1/2 systems, which will also be presented for comparison.

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