Jacobs, DanielKhanikaev, Alexander BMiroshnichenko, AndreyKivshar, Yuri2018-11-292018-11-291367-2630http://hdl.handle.net/1885/152987We demonstrate that topologically nontrivial states of light can be engineered in periodic photonic structures containing media with a Tellegen-type bianisotropic response. Whilst in such bianisotropic materials the time-reversal symmetry is broken, they are characterized by an intrinsic magnetic order which does not require macroscopic magnetization. Our design can therefore be considered as a direct analog of the solid state Chern insulator which exhibits a topological order in the absence of an external bias. Numerical simulations of such Tellegen photonic crystals reveal the existence of one-way edge transport at domain walls and perfectly conducting boundaries not sensitive to structural imperfections such as local defects and disorder. We demonstrate a scheme for achieving robust steering of the edge modes by controlling the phase and amplitude of the source.application/pdfDaniel A Jacobs needs to add onto internal list Please. (Done)201510.1088/1367-2630/17/12/1250152018-11-29