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SUMMARY:Photonic topological insulators and pseudomagnetism - Dr Mikael Re
 chtsman\, Technion – Israel Institute of Technology\, Solid State Instit
 ute\, Haifa 32000\, Israel
DTSTART:20140428T103000Z
DTEND:20140428T113000Z
UID:TALK52321@talks.cam.ac.uk
CONTACT:Leona Hope-Coles
DESCRIPTION:I will present two examples in which ‘fictitious fields’ l
 ead to surprising photonic effects that would be difficult (if not impossi
 ble) to achieve with real fields.  Firstly\, I will present the first obse
 rvation of the topological protection of light - a ‘Photonic Floquet Top
 ological Insulator’ [1].  The structure is an array of coupled helical w
 aveguides (the helicity generates a fictitious circularly-polarized electr
 ic field that leads to the TI behavior).  Second\, I will demonstrate arti
 ficial magnetic fields (‘pseudomagnetism’) in photonic lattices [2]. T
 he pseudomagnetic field is generated by inhomogeneously straining the syst
 em (thus breaking periodicity)\, and leads to photonic Landau levels with 
 very high photonic density of states.  Potential applications include robu
 st photonicdevices and strong light-matter interaction over large areas.\n
 \n[1] Rechtsman\, M. C. et al. Nature 496\, 196–200 (2013).\n[2] Rechtsm
 an\, M. C. et al. Nature Photon. 7\, 153–158 (2013).\n
LOCATION:Small Lecture Theatre\, Cavendish Laboratory\, Department of Phys
 ics
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