Higher-order Dirac semimetal in a photonic crystal

Higher-order photon correlations in pulsed photonic crystal nanolasers

Higher-order vector beams produced by photonic-crystal lasers.

We have successfully generated vector beams with higher-order polarization states using photonic-crystal lasers. We have analyzed and designed lattice structures that provide cavity modes with different symmetries. Fabricated devices based on these lattice structures produced doughnut-shaped vector beams, with symmetries corresponding to the cavity modes. Our study enables the systematic analys...

Dirac semimetal in three dimensions.

We show that the pseudorelativistic physics of graphene near the Fermi level can be extended to three dimensional (3D) materials. Unlike in phase transitions from inversion symmetric topological to normal insulators, we show that particular space groups also allow 3D Dirac points as symmetry protected degeneracies. We provide criteria necessary to identify these groups and, as an example, prese...

Negative magnetoresistance in Dirac semimetal Cd3As2

A large negative magnetoresistance (NMR) is anticipated in topological semimetals in parallel magnetic fields, demonstrating the chiral anomaly, a long-sought high-energy-physics effect, in solid-state systems. Recent experiments reveal that the Dirac semimetal Cd3As2 has the record-high mobility and positive linear magnetoresistance in perpendicular magnetic fields. However, the NMR has not ye...

Nonclassical higher-order photon correlations with a quantum dot strongly coupled to a photonic-crystal nanocavity

Armand Rundquist,1,* Michal Bajcsy,1,2,† Arka Majumdar,1,3,4 Tomas Sarmiento,1 Kevin Fischer,1 Konstantinos G. Lagoudakis,1 Sonia Buckley,1 Alexander Y. Piggott,1 and Jelena Vučković1 1E. L. Ginzton Laboratory, Stanford University, Stanford, California 94305, USA 2Institute for Quantum Computing, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1 3Department of Physics, University of Cal...