Title :
Generalized three-dimensional Dirac points and Z2 gapless surface states in a topological photonic crystal
Author :
Ling Lu ; Chen Fang ; Hsieh, Timothy H. ; Liang Fu ; Johnson, Steven G. ; Joannopoulos, John D. ; Soljacic, Marin
Author_Institution :
Dept. of Phys., Massachusetts Inst. of Technol., Cambridge, MA, USA
Abstract :
We discover robust three-dimensional generalized Dirac points - linear four-fold point degeneracies - in a non-symmorphic photonic crystal realizable at near-infrared wavelengths. The surface states exhibit gapless line-nodes characterized by a Z2 topological invariant.
Keywords :
photonic band gap; photonic crystals; surface states; topological insulators; Z2 gapless surface states; Z2 topological invariant; gapless line-nodes; linear four-fold point degeneracy; near-infrared wavelengths; nonsymmorphic photonic crystal; three-dimensional generalized Dirac points; topological photonic crystal; Lattices; Mirrors; Optical surface waves; Photonic crystals; Photonics; Scattering; Three-dimensional displays;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2015 Conference on
Conference_Location :
San Jose, CA
