Honeycomb lattice potentials and Dirac points

C Fefferman, M Weinstein - Journal of the American Mathematical Society, 2012 - ams.org
We prove that the two-dimensional Schrödinger operator with a potential having the
symmetry of a honeycomb structure has dispersion surfaces with conical singularities (Dirac …

Diverging Rabi oscillations in subwavelength photonic lattices

B Alfassi, O Peleg, N Moiseyev, M Segev - Physical Review Letters, 2011 - APS
We show that Rabi oscillations between Bloch modes of an optical waveguide array with
subwavelength periodicity diverge, both in frequency and in field amplitude, when the …

Time-reflection beyond the critical angle

L Bar-Hillel, A Dikopoltsev, Y Sharabi… - 2022 Conference on …, 2022 - ieeexplore.ieee.org
Time-reflection beyond the critical angle Page 1 Time-reflection beyond the critical angle Lior
Bar-Hillel2, Alex Dikopoltsev1, Yonatan Sharabi1, Eran Lustig1, Amir Shmuel1, Mordechai …

Demonstration of pseudospin-to-orbital angular momentum conversion in photonic graphene

X Liu, D Song, S **a, Z Dai, L Tang… - 2018 Conference on …, 2018 - ieeexplore.ieee.org
Momentum-matched selective excitation of two sublattices with vortex beams leads to direct
observation of pseudospin-dependent conical diffraction and topological charge …

Composite multi-vortex diffraction-free beams and van-Hove singularities in honeycomb lattices

V Paltoglou, Z Chen, NK Efremidis - Optics Letters, 2015 - opg.optica.org
We find diffraction-free beams for graphene and MoS 2-type honeycomb optical lattices. The
resulting composite solutions have the form of multi-vortices, with spinor topological charges …

Direct observation of “pseudospin”-mediated vortex generation in photonic graphene

D Song, L Tang, Y Zhu, M Ablowitz… - 2014 Conference on …, 2014 - ieeexplore.ieee.org
Direct observation of “pseudospin”-mediated vortex generation in
photonic graphene Page 1 FM2D.2.pdf CLEO:2014 © 2014 OSA 1 Direct observation of “pseudospin”-mediated …

Asymmetric conical diffraction and generation of non-integer phase singularities in photonic graphene

D Song, S Liu, V Paltoglou, D Gallardo… - CLEO …, 2015 - opg.optica.org
We demonstrate asymmetric conical diffraction accompanied by pseudospin-mediated non-
integer phase singularities when two sublattices of photonic graphene are equally excited …

Light localization and Shockley surface states in honeycomb photonic lattices

D Song, C Lou, N Malkova, Z Ye, Y Hu… - … Electronics and Laser …, 2011 - opg.optica.org
Bandgap guidance in optically-induced photonic lattices with a negative defect Page 1 Light
localization and Shockley surface states in honeycomb photonic lattices Daohong Song1, Cibo …

Demonstration of pseudospin-dependent topological charge transformation in photonic graphene

D Song, X Liu, S **a, Z Dai, L Tang, J Xu… - Conference on Lasers …, 2018 - opg.optica.org
Momentum-matched selective excitation of two sublattices with vortex beams leads to direct
observation of pseudospin-dependent conical diffraction and topological charge …

Landau-Zener-Bloch oscillations and valley-dependent vortex generation in photonic graphene

Y Sun, D Leykam, S Nenni, D Song, H Chen… - CLEO …, 2018 - opg.optica.org
We observe Bloch oscillations and Landau-Zener-tunneling at Dirac points in photonic
graphene. The non-adiabatic wave dynamics depend anisotropically on the direction of an …